HYDRAULIC POWER CONTROL
54
99740000PDV AC 11/06/2021
997PDV00074 // 25/08/2022
Pb
T
Pp
Pa
T
Pp
PID
μP
PEAC111 is a proportional high performance PDV spool actuation
with integrated electronics and inductive transducer ( LVDT ) that
operates safely and precisely the main spool movement according
to an electrical signal coming from a remote control.
The input signal by means of the PCB and the two proportional
pressure reducing valves, determines the level of the pilot pressu-
re which moves the main spool.
The spool position is detected in the LVDT transducer which gene-
rates an electric feed-back signal registered by the electronics.
The variation between the input signal and the feed-back signal,
actuates the solenoid valves accordingly, so that, the hydraulic
pilot pressure will drive the main spool in the right position.
All PEAC111 modules comes with integrated fault monitoring
system, available in two version:
Active version
Passive version
Active fault monitoring
When an error state is detected, the two proportional solenoid
valves will be automatically deactivated, a red lamp will light-up
and drive the spool in neutral position (if it’s not seized up ).
The system will only react to failures of more than 500 ms ( in
other words there is delay of half a second before anything
happens ). An alarm signal is sent out through the connector, and
minus is opened.
This error state is memorized, and continues until the system is
being reset by switching o the supply voltage.
Shortly, when the active fault monitoring system is connected
and an error state is detected, the system ensures a fast and
operator free reaction, that will put the complete hydraulic circuit
into venting conditions, thus preventing uncontrollable machine
movements.
Passive fault monitoring
When an error state is detected, the two proportional solenoid
valves will not be deactivated, a red lamp will light-up, but still
control the main spool.
When a fault condition occurs, after a delay of 250 ms an alarm
signal is sent out through a devoted pin
This state is not memorized, and when the faulty state disappears,
the alarm signal will turn to passive again.
In order to prevent the electronic from going into an unde ned
state, any time the system is being triggered or reset, a general
check of power supply and the internal clock frequency is made.
The use of PEAC111 module both passive or active version, allows
the machines hydraulic system to be made with di erent level of
safety degree that for the choice of which it is essential to know
the exactly required functions.
When the PEAC111 module active version is connected with
the pump unloading system, the level of safety degree pro-
tection for the complete hydraulic system becomes very high,
operator free, and helps OEM to meet the PL ( Performance
Level ) required to be comply with the safety demands of Ma-
chinery Directive 2006/42/EC.
PDV74 - PEAC111 Electro-hydraulic proportional actuation
Closed loop spool control, high performance resolution
Input signal control 0,5 Udc