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8. Control input signal wiring
M3 screws are used for control signal terminals.
Use the proper terminal and securely fasten the screws.
Use wiring that conforms to crimping terminals.
Control signal from the controller (4
–
20 mA, 1
–
5 V, 0
–
10 V, contact, etc.) enters the control input signal terminals (C1, C2, C3).
Be careful of the polarity and make sure noise from strong electric circuits does not get into the wiring.
Countermeasure against lightning surge will be required for signal line over 30m.
8-1. 1-to-1 connection with controller
Connection with voltage/current output controller
Adjust controller output with control signal of the PAC18A.
In the case of 1-to-1 connection, connect the positive
controller output terminal (+) to C1 and the negative
terminal (-) to C2 as shown in the figure above.
Controller
䚷䚷䚷
PAC18A
C1(+)
C2(-)
Voltage/current
+
-
Connection with contact output controller
Controller
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PAC18A
C2(-)
C3
On-off signal
If connecting with on-off signal, connect between C2
and C3 terminals.
8-2. Multiple units connected to a single controller
Current input connection diagram
Voltage input connection diagram
9. Precautions when turning on the power
9-1. Power supply voltage
Power supply voltage for control should be from 100 to 240V.
If voltage in excess of the rating is applied, internal components could be damaged. You should therefore be careful of the power supply voltage.
Refer to
‘
6. Terminal arrangement and wiring example
’
to connect power supply and load, control power supply. Connect so that main power supply
(R terminal) and control power (Ra terminal) phase are the same.
The equipment will not operate if the phases are reversed.
9-2. Power supply frequency
Power supply frequency should be 50/60 Hz.
Power supply frequency is automatically determined, but the device cannot handle sudden frequency change.
Before switching frequency, turn off the device’s power.
Changing power supply frequency with the power on could result in malfunction and result in 100% output.
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