CytroPac
Contents
Features 1
Ordering code 2
Selection table 3
Selection table 4
Selection table 5
Technical data
(For applications outside these values, please consult
us!) 7
Technical data
(For applications outside these values, please consult
us!) 8
Characteristic curves
(measured with HLP32, ϑ
oil


Characteristic curves
(measured with HLP32, ϑ
oil

 
Characteristic curves
(measured with HLP32, ϑ
oil

 
Dimensions:
 
Circuit diagram, hydraulic 13
Sensor and interface selection 15
CytroPac UL version (cULus-listed) 16
Electrical connections 17
Accessories (separate order) 21
Accessories (separate order) 22
Project planning information 26
Further information 26
RE51055, edition: 2022-07, BoschRexrothAG
Features

Power 1.5 …
interfaces
Power unit is suitable for S1 operation
(continuous operation)
Early warning signals in case of faults regarding oil

converter

(plug&play)
Integrated cooling for motor and frequency converter,
optionally also for active oil cooling




Sleep function to reduce the power consumption,

Component series 1X
Contents
Features 1
Ordering code 2
Selection table 3 ... 5
Technical data 7, 8
 
Dimensions: 12
Circuit diagram, hydraulic 13
Sensor and interface selection 15
 
Electrical connections 17
Accessories (separate order) 21, 22
Project planning information 26
Further information 26
Hydraulic power unit
TypeCytroPac
RE51055 


2/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Ordering code
01 Hydraulic power unit CYTROPAC
02 Component series 10…19(10…19: unchanged installation and connection dimensions) 1X
Tank size
03 20 liters 20
Drive
04 Asynchronous motor with frequency converter AF
Asynchronous motor with frequency converter and STO ST
Performance class
05 1.5 kW 1
2.2 kW 2
3.0 kW 3
4.0 kW 4
Pump
06 Size4 AS04
Size5 AS05
Size8 AS08
Size11 AS11
07 Maximum operating pressure (see characteristic curve page 9) 2
Sensor technology
08 Basic B
Premium RJ45 P
Premium M12x1 E
Cooling type/ maximum cooling power of uid
1)
09 Without additional cooling packages WA
500 … 1000Watt (1 cooling package)
2)
WB
1000…1500Watt (2 cooling packages)
2)
WC
1500…2000Watt (3 cooling packages)
2)
WD
Filling
10 Return ow lter 1
Coloring
11 RAL 7035 7035
Further details
12 Without ‒
Additional tank port A1
UL-certied UL
01 02 03 04 05 06 07 08 09 10 11 12
CYTROPAC – 1X / 20 / / 2 / / / 1 / 7035 /
1)

and the frequency converter must always be ensured before the

Notice:



2)
Depending on the water inlet temperature, oil level, pressure and
flow
CytroPac | Hydraulic power unit 3/28
RE51055, edition: 2022-07, BoschRexrothAG
Selection table
CytroPac power 1.5kW
Power  Displacement Sensor technology design Cooling type Material number Material number STO
1.5
4
Basic
  
  
  
  
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  
  
  
  
5.5
Basic
  
  
  
  
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  
  
  
  
8
Basic
  
  
  
  
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  
  
  
  
11
Basic
  
  
  
  
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  
  
  
  
4/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Power  Displacement Sensor technology design Cooling type Material number Material number STO
2.2
4
Basic
  
  
  
  
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  
  
  
  
5.5
Basic
  
  
  
  
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  
  
  
  
8
Basic
  
  
  
  
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  
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  
11
Basic
  
  
  
  
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  
  
  
  
CytroPac power 2.2kW
Selection table
CytroPac | Hydraulic power unit 5/28
RE51055, edition: 2022-07, BoschRexrothAG
Selection table
Power  Displacement Sensor design Cooling type Material number Material number STO

4
Basic
  
  
  
  
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  
  
  
  
5.5
Basic
  
  
  
  
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  
  
  
  
8
Basic
  
  
  
  
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  
  
  
  
11
Basic
  
  
  
  
Premium RJ45
  
  
  
  
CytroPac power 3.0kW
6/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Power  Displacement Sensor technology design Cooling type Material number Material number STO

4
Basic
  
  
  
  
Premium RJ45
  
  
  
  
5.5
Basic
  
  
  
  
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  
  
  
  
8
Basic
  
  
  
  
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  
  
  
  
11
Basic
  
  
  
  
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  
  
  
  
CytroPac power 4.0kW
CytroPac | Hydraulic power unit 7/28
RE51055, edition: 2022-07, BoschRexrothAG
Technical data
(For applications outside these values, please consult us!)
Hydraulic
Maximum operating pressure bar 
Maximum flow l/min 
Oscillating volume l 
 l 
Maximum return flow via return flow filter l/min 35
Temperature range hydraulic fluid  
Admissible hydraulic fluids 
Maximum admissible degree of contamination of the


1)
Return flow filter 
Filter rating µm 
Cold start  
Early warning % 75
 % 
Filling level monitoring
(residual volume)
Early warning l 
 l 7
Temperature monitoring Early warning  
  65
Pump
Minimum flow l/min 

 mm
2
/s 

General
Installation position 
Line connections Pressure port G1/2
Return flow G1/2 (via filter)

Place of installation Industrial building with minor corrosion conditions

Ambient temperature range (during operation)  
Material  Polyamide
Hood
Hood, UL version
Polyamide
Steel
Central plate 
  
1)
The cleanliness classes specified for the components must be
adhered to in hydraulic systems. Effective filtration prevents
faults and at the same time increases the life cycle of the com
ponents.

Hydraulic fluid Classification Suitable sealing
materials
Standards Datasheet
Mineral oils



NBR, FKM DIN 51524 
Important notes on hydraulic uids:
For further information and data on the use of other hydraulic

8/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Technical data
(For applications outside these values, please consult us!)
Electrical
Performance class  
 -
Frequency  
 

protective motor
switch (on the
customer side)
  
  16
  
  
Cooling water
Requirement
cooling water
supply
Flow
1)
l/min > 8
Inlet temperature  
Connections G1/2 (2x, cylindrical)
Maximum glycol share % 
Maximum cooling water pressure bar 
Notice:
The cooling water supply for cooling the motor and the
frequency converter must always be activated before the
operation. It must be ensured that the cooling water supply
temperature does not fall below the dewpoint of the ambient
air of the power unit.
Different coolant possible after consultation.
1)
In case of deviating flow, please consult the product
management.
CytroPac | Hydraulic power unit 
RE51055, edition: 2022-07, BoschRexrothAG
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
135791113151719212325272931333
537
230
240
250
1
2
3
4
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
135 791113151719212325272931333
53
7
230
240
250
3
2
1
1 2 3 4
4
Characteristic curves
(measured with HLP32, ϑ
oil

Performance diagram for the project planning of the performance class
Continuous operation (S1) 1.5kW



Continuous operation (S1)
1 
2 
3 
4 
1 4 ccm
2 5.5 ccm
3 8 ccm
4 11 ccm
Performance diagram for selecting the pump
0
10
20
30
40
50
60
70
80
90
135791113151719212325272931333
4
3
2
1
1 2 3 4
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
135791113151719212325272931333537
230
240
250
4
3
2
1
1 2 3 4


Performance diagram for selecting the pump

1 4 ccm
2 5.5 ccm
3 8 ccm
4 11 ccm
1 4 ccm
2 5.5 ccm
3 8 ccm
4 11 ccm
 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Characteristic curves
(measured with HLP32, ϑ
oil

Continuous operation (S1) 2.2kW
Continuous operation (S1) 3.0kW
Performance diagram for selecting the pump

0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
135791113151719212325272931333
537
230
240
250
4
3
2
1
1 2 3 4

1 4 ccm
2 5.5 ccm
3 8 ccm
4 11 ccm
200140 160180 200220 2401201008040 60
0
50
100
150
200
250
300
350
400
450
CytroPac | Hydraulic power unit 11/28
RE51055, edition: 2022-07, BoschRexrothAG
Characteristic curves
(measured with HLP32, ϑ
oil

Performance diagram for selecting the pump
Continuous operation (S1) 4.0kW

Minimum speed of drive unit


63,5
G1
G1/2*
G1
G1/2
130
405
610
X
T
T
T
P
G1/2*
130
K
K
366
X (port p) Pump design
65 
64 
61 
58 AS11
12/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Dimensions:


Notice:




The cooling water ports K: G1/2 are to be designed with

12X1
14X1
15X1
16X1
21X1
22X1
a
c
EFC5610
G1/2
G1/2
NG20
10 µm
PS
60 °C = T1
7l B4
-S*
10 l A2
-S*
75 % 100 %
T G1/2
T G1
A1 G1
T G1
P G1/2
4 - 20 mA
1.1
2
8
3
9
576
4.1
4
65 °C = T2
10
1
4.2
21X2
CytroPac | Hydraulic power unit 13/28
RE51055, edition: 2022-07, BoschRexrothAG
Circuit diagram, hydraulic
1 
1.1 Central plate (integrated heat exchanger)

2 Pump
3 Motor
4 
4.1 Filter contamination sensor 75%
4.2 
5 Filling level and temperature sensor
6 
7 Frequency converter
8 O
9 Pressure load cell
10 
11 Filling coupling (optional)
15X1
22X1
14X1
4.1
6
12X1
21X2
21X1
5
Electrical connections



14X1: Mini USB service interface
22X1: STO interface (optional)



22X1: STO interface (optional)
4.2
14/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
STOfunctionality (Safe Torque Off)
The STO function is used if separation from the mains is

this function, the energy supply of the motor can be
safely interrupted.
In this case, the drive cannot generate any torque /
force and thus no dangerous movements.
Sleep function

accelerated before hydraulic actuators are connected.
This reduces the collapse of pressure and you can

By means of the integrated pressure monitoring,
the hydraulic power unit is automatically switched off

below the set threshold value or respectively switched
on if the pressure is dropping.
This increases the energy efficiency and you can,



A1 option


next to the pressure port.
4
2
1
3
=25 Nm
50
3
47
610
Option A1
Optional

Notice:
For further information, refer to the EFC operating instructions

A1 option
Prestart Control (pressure drop/excessive pressure
compensation)
Pos. Component designation Material number
1 
2 SQUARE NUT 53X53X8 / G1 
3 CENTERING RING  
4  
CytroPac | Hydraulic power unit 15/28
RE51055, edition: 2022-07, BoschRexrothAG
Basic Premium
Sensor
technology

✓ ✓

✓ ✓

✓ ✓

✓ ✓

✓ ✓

✓ ✓

✓ ✓
Analysis

✓
–
 –
✓
 –
✓
Interfaces

✓ ✓

✓ ✓
USB service interface
✓ ✓

✓ ✓
 –
✓
 –
✓
Functions
Sleep function for accumulator charging circuit
✓ ✓

✓ ✓
Prestart Control
✓ ✓
 –
✓
 –
✓
Sensor and interface selection
16/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
CytroPac UL version (cULus-listed)

and is therefore approved for the American and

The main difference to the standard is the newly designed


The CytroPac can be found in the UL database by

https://iq.ulprospector.com/info/
Material
number
Denomination
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1)
Individual configurations can be created on request from

Preferred types
1)
CytroPac | Hydraulic power unit 17/28
RE51055, edition: 2022-07, BoschRexrothAG
+EXT
L1 L2 L3 PE
-POWER
2 PE3
-12X1
1
Electrical connections
12X1: Feed-in / voltage supply


12X1: Connector
1 2
PE 3
Pin Function
1 L1
2 L2
3 L3
Voltage 
Frequency 
Assignment L1/L2/L3/PE
Rotating eld 
Pre-fuse on the
customer side




14X1: USB to the frequency converter
-INTERFACE
2 4 5 73 8
-15X1 1
6
+EXT
15X1: 24 V interface (Basic)

Ready for operation
Enable


Parameter set

Parameter set
Bit 1
Note:

GND
18/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
15X1: 24 V interface (Premium)
15X1: 24 V interface (Basic and Premium)
Pin Function Basic Premium
1 
✓ ✓
2 Ready for operation
✓
*
3 Enable
✓
*
4 Ground
✓ ✓
5 
✓
*
6  ‒ *
7 
✓
*
8 Selection of pressure command value bit 1
✓
*
(Connector)


*
Pin 8
bit 1
Pin 7
bit 0
Parameter Designation
Parameter set 1 
Pressure command

1 Parameter set 2 
Pressure command
digital setting 1
1 Parameter set 3 
Pressure command
digital setting 2
1 1 Parameter set 4 
Pressure command
digital setting 3
Note:

Note:

the integrated control and evaluated at the factory.

and can be read out via the USB service interface.
Changing the operating pressure:
In the Basic version, up to four pressure ratings can be set.
The settings are described accordingly in the operating

-INTERFACE
2 4 5 73 8
-15X1 1
6
+EXT

Ready for operation
Enable



Parameter set

Parameter set
Bit 1
GND
CytroPac | Hydraulic power unit 
RE51055, edition: 2022-07, BoschRexrothAG
22X1: Safe Torque OFF (STO)
Pin Function
1 Not used (NC)
2 STO 1 +
3 
4 STO 2 +
5 
6 Not used (NC)
7 Not used (NC)
8 Not used (NC)
(Connector)


-STO
+
-
24VDC
STO1 STO2
2 4 5 73 8
-22X1
1
6
+EXT
21X1 / 21X2: Multi-Ethernet interface

21X1 / 21X2: Alternative version "E"
(Premium-M12)
2
5
1
4
3
Pin Function
1 TxD +
2 RxD +
3 TxD +
4 RxD +
5 Not used

(bushing)
 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Filter contamination sensor 75%
Pin Function
1 
2 

(Connector)
Filter contamination sensor 100%
Pin Function
1 
3 

(Connector)
Filling level/temperature sensor
Pin Function
1 
2 
3 
4 Early warning temperature

(Connector)
Notice:
Use only suitable connectors and/or lines with IP67 rating.

Filling level, temperature and filter contamination sensor
P P
1
34
34
2
1
321
Filter contamination
sensor 75%
Filter contamination

M12x1 thread

M12x1 thread

M12x1 thread

Filling level/
temperature sensor
A2
T1

B4
T2

 
Notice:

evaluated on the customer side.
Notice:
Circuit diagram representation in the ready for operation state,

CytroPac | Hydraulic power unit 21/28
RE51055, edition: 2022-07, BoschRexrothAG
Accessories (separate order)
12X1 Voltage supply
Electric
 
Straight power connector without cable
mandatory for operation
  
  
  
 


14X1
USB - service interface
  
USB mobile phone or charging cables are not suitable and
susceptible to fault!
15X1 / 22X1 Enable customer interface / STO
  


2

  


2


  
Contact jumper for port 22X1 to be able to deactivate the

21X1 / 21X2 Multi-Ethernet interface
1)
   Connector without cable
   
   
   
  


  


  


General
  
Optional cable set for Basic version to connect the sensors for

temperature with one supply line
1)

22/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
34,6
SW27
approx. 78,5
19,5
Power connector (12X1)
Accessories (separate order)
Mechanical
Filter element (return ow lter)
 
Filter element (air lter)
 AIR FILTER
TMDF/1/BRC Standard
 AIR FILTER
TMDF/1/BR 
Pressure limitation unit

PRESSURE LIMITATION UNIT



PRESSURE LIMITATION UNIT


Material number Denomination
 

*OPT.CYTROPAC
Mechanical
Mounting kit
 MOUNTING KIT
BASE285 *OPT CYTROPAC 
Filling device
 FUEL UNIT
 
 COUPLING SOCKET
 
Connection accessories

CONNECTION ACCESSORIES HYDR.CON*OPT.
CYTROPAC

Oil pan
  
CytroPac | Hydraulic power unit 23/28
RE51055, edition: 2022-07, BoschRexrothAG
Ø285
Ø162
4x Ø9
Foot mounting
Material number Denomination
 MOUNTING KIT BASE285 *OPT.CYTROPAC 
Foot mounting with


(not included in the
scope of delivery)



scope of delivery)
24/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Oil pan
Material number Denomination
  Optional oil pan
500
(700)
87
105
500
560
430
n14 (4x)
600
77
77
480
Material number Denomination

PRESSURE LIMITATION UNIT


PRESSURE LIMITATION UNIT

CytroPac | Hydraulic power unit 25/28
RE51055, edition: 2022-07, BoschRexrothAG
Pressure limitation (optional)


Minimess connection
Hose
Fittings
Technical data
Hydraulic
 NG 6
Set pressure bar 
bar 
 16S
26/28 Hydraulic power unit | CytroPac
BoschRexrothAG, RE51055, edition: 2022-07
Project planning information
It has to be ensured before the commissioning that



in the pressure line.


on the customer side, as described on page 17.
For the cooling of the motor and the frequency
converter, the power unit must imperatively be
connected to cooling water.
Further information
 
 
 www.boschrexroth.com/filter
 www.boschrexroth.com/spc
EFC operating instructions 
 
The connection of the power unit to the machine

(no rigid pipeline admissible).
It must be ensured on the customer side that the
cooling water supply temperature does not fall below
the dewpoint of the ambient air of the power unit.

must not be exceeded.
BoschRexrothAG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specications and other information
set forth in it, are the exclusive property of BoschRexrothAG. It may not be
reproduced or given to third parties without consent of BoschRexrothAG.
The data specied above only serve to describe the product. No statements
concerning acertain condition or suitability for acertain application can be
derived from our information. The information givendoes not release the user
from the obligation of own judgment and verication.
It must be remembered that our products are subject to anatural process of
wear and aging.
CytroPac | Hydraulic power unit 27/28
RE51055, edition: 2022-07, BoschRexrothAG
BoschRexrothAG, RE51055, edition: 2022-07
28/28 Hydraulic power unit | CytroPac
BoschRexrothAG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specications and other information
set forth in it, are the exclusive property of BoschRexrothAG. It may not be
reproduced or given to third parties without consent of BoschRexrothAG.
The data specied above only serve to describe the product. No statements
concerning acertain condition or suitability for acertain application can be
derived from our information. The information givendoes not release the user
from the obligation of own judgment and verication.
It must be remembered that our products are subject to anatural process of
wear and aging.