Wilkerson ER2 - Manual (Page 3)

Position #4
ON PSIG / OFF Bar
(For LCD Units Only)
Position #3
4–20 mA Control
Position #2
INTERNAL Control
Position #5
Internal Sensor
Position #6
(Not Used)
Position #7
Range Selection
Position #1
0–10 VDC Control
Position #6
4–20 mA
Control Signal
Position #5
0–10 VDC
Control Signal
Position #4
Not Used
Position #3
0–10 VDC
Monitor Signal
Position #2
Common
Ground (-)
Position #1
VDC Supply (+)
Positive Pole
!
Figure 3A – Control Options
PLC Control with 0 – 10 VDC
PLC
Power Supply (+)
12 – 28 VDC (–)
Monitor Signal (+)
0 – 10 VDC (–)
Control Signal (+)
0 – 10 VDC (–)
Pressure Display
and
Internal Pressure Control
E
P
1
2
3
4
5
6
PLC Control with 4 – 20 mA
PLC
Power Supply (+)
12 – 28 VDC (–)
Monitor Signal (+)
0 – 10 VDC (–)
Control Signal (+)
4 – 20 mA (–)
Pressure Display
and
Internal Pressure Control
I
P
1
2
3
4
5
6
Internal Potentiometer
Power Supply (+)
12 – 28 VDC (–)
Monitor Signal (+)
0 – 10 VDC (–)
Pressure Display
and
Internal Pressure Control
E
P
1
2
3
4
5
6
Figure 3 – Terminal Block
Figure 2 – Jumper Connections
If using an external control circuit, connect the wires to
the appropriate terminals as follows:
(Refer to Figure 3)
Control signal:
- If using a 0–10 VDC control signal, connect the control wire
to position #5.
- If using a 4–20mA control signal, connect control wire to
position #6.
Monitor signal: (If used)
- Connect the external monitor feedback to position #3, this
outputs a 0–10 VDC that corresponds to a 1 VDC per 10%
of range.
Supply voltage and common ground:
- Connect the supply voltage positive pole (+) to position #1.
- Connect the common ground (–) for supply, control and
monitor signals to position #2.
If using the internal resistor control, wire the unit as follows:
Monitor signal: If monitor signal is not required, no
connection is required.
- Connect the external monitor feedback to position #3, this
outputs a 0–10 VDC that corresponds to a 1 VDC per 10%
of range.
Supply voltage and common ground:
- Connect the supply voltage positive pole (+) to position #1.
- Connect the common ground (–) for supply, and monitor
signals to position #2.
CAUTION: Reversing the polarity of the supply signal my
result in damage to the board.
Once the wires are properly located, secure the wires in the
terminal block and tighten the strain relief to secure the wires
and provide protection from the environment.