Bulletin 408427 R01 13.06.2016
Instructions de Montage, Mise en Service & Maintenance
EPP4 Pressure Regulator
Part Mo. 497312
6
Parker Hannifin Manufacturing Switzerland SA
Fluid Control Division Europe
CH-1227 Carouge-Genève
EPP4 SETTING INSTRUCTIONS
The EPP4 regulators are fully adjusted and quality controlled at the factory to obtain standard specifications.
Here are the main factory settings:
Control signal
calibration
U output
calibration
I output
calibration
Alarm
Logic
Alarm
Error+
Alarm
Error-
Alarm
Delay ON
Alarm
Ton min
Alarm
Delay OFF
0-10V or
4-20mA
0-10bar
0-10bar
0-10V
0-10bar
4-20mA
negative
0.5 bar
0.5 bar
0
0
0
0-10V or
4-20mA
0-20bar
0-20bar
0-10V
0-20bar
4-20mA
negative
1 bar
1 bar
0
0
0
Control signal:
0 to 10 Volt or 4 to 20mA corresponding to an output pressure range of, for example, 0 to 10 bar.
(1V / 1 bar or 5,6mA / 1 bar)
REGULATION
Hysteresis:
This value is adjusted in order to obtain an inaudible correction of the two 2-way solenoid pilots when
there is no change of the control signal.
P4B.61.. < 100 mBar
P4B.91.. < 100 mBar
P4B.41.. < 200 mBar
Forced exhaust:
The EPP4 regulator is equipped with an electronic safety circuit which automatically drops the output pressure at 0 bar
when the control signal is below 50 mV or 4.1 mA.
For safety reasons, it is recommended to reset the control signal at 0 bar
before
re-connecting the supply voltage
(24VDC).
MAINTENANCE
The EPP4 does not require any maintenance. However the quality of used air should be checked periodically.
Use current product to clean EPP4.
TROUBLE SHOOTING
Without removing the EPP top cap:
Record :
- EPP type
- Manufacturing date
- Input pressure
Check :
- Ports thread (P, A, R) quality
- Correct contact plastic cover / regulator body
- Correct pins level / position in the M12 plug
- Pilot exhaust orifice
TROUBLE SHOOTING
Problem
Procedure
Unexpected behaviour
Basic electrical controls See paragraph Electrical connections
Basic pneumatic controls See paragraph Port connections
Shut down 24 VDC. Wait 10 sec. Turn on 24VDC
Check the PLC signal
For other problems
Contact your agent.
