Parker VRD355 Series - Comparator Output; Externally selected Command Signals and Directions; Wiring Diagram of Rear Connector

34
IA VRD UK.INDD RH 02.06
Digital Power Amplifier
Series VRD350 and VRD355Installation Manual
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Select
Direction
Sign for
meas. value
parameter
LED for Direction
+ -
none
positive flashes off
negative off flashes
+
positive flashes fast off
negative on flashes
-
positive flashes on
negative off flashes fast
Pin d b z
2 0V external not connected - direction (A)
4 S2 not connected + direction (B)
6 S3 not connected S4
8 Enable not connected S1
10 Feedback input Feedback value display RS232C RXD
12 Command signal 6U
E+
RS232C TXD Command signal 5
14 Error Comparator not connected
16 Command signal 6U
E-
PE (decoupled) not connected
18 PE PE Reset Ramp
20 -10V output PE (decoupled) +10V output
22 Solenoid A Solenoid A Solenoid A
24 Solenoid B Solenoid B Solenoid B
26 Supply 0V Supply 0V Analogue 0
28 Solenoid A Solenoid A Solenoid A
30 Solenoid B Solenoid B Solenoid B
32 Supply +24V Supply +24V 24V external
5. Terminals on Rear Connector
4.5. Externally selected Command Signals and
Directions
4 LEDs indicate the selected command signal
(S1 to S4). 2 LEDs indicate the selected direction
(+ or -).
The LED’s + and - are also used to show the signs
for internal measured values and parameters (see
also page 20).
4.4. Comparator Output
• When the switching conditions for the com-
parator are fulfilled, the signal at the output
Comparator (terminal 14b) is set to 24V.
• The ‘comparator’ output is opto-decoupled (see
also page 9) and is short circuit protected by a
PTC resistor.
• The LED “reset ramp“ is also used for display
of the comparator status (see also page 31).