Fuji Electric PXZ Series Operation Manual page 8

Wiring Outputs
Before wiring the outputs, make sure the unit has the right kind of
control output, and that all the load handling devices conform to the
controller specifications. Note that it takes 5 seconds for the outputs
to activate after the power is turned on.
Refer to parameter "P-n1" and to the Table of Output Type Codes to
choose the preferred type of control action– reverse acting or direct
acting. If using two outputs in a heat/cool type control, please refer to
Appendix D for more details.
Relay
• Connecting a load to full capacity of the relay will shorten the relay
life, especially if it is operated at a rapid rate. To protect the output
relay, an external relay or a contactor
should be used. If a higher current rating
is required, a solid-state relay driver type
output is recommended.
• Connect the load between the normally
opened contacts of the relay.This way, if
power to the controller is disrupted, the
output circuit would open, preventing the
load from running out of control.
• Set the proportional time cycle parameter, "TC" to 30 secs. or more.
• Use of "Z-trap" (manufacturer: Fuji Electric Co.) is recommended to
protect the relay against switching surges and to ensure the prod-
uct's long life. Connect it between the contacts of the relay as
shown in the example.
Part No.:
ENC241D-05A
(power supply voltage: 100V)
ENC471D-05A
(power supply voltage: 200V)
SSR/SSC Driver (Pulsed DC Voltage)
• The non-isolated DC output is used to drive an external load-han-
dling device such as Solid-State Relay(SSR) or Solid-State
Contactor(SSC).
• The total current drawn, for both single and dual outputs, should be
within the allowed value.
• Make sure the polarity is correct.
• Set the proportional time cycle parameter, "TC" to 1 sec. or more.
4 to 20mA DC
• The output is a non-isolated analog signal used to drive a variety of
output devices such as SCRs and valve actuators.
• The load resistance must be less than 600Ω.
• Make sure the polarity is correct.
• The proportional time cycle parameter, "TC" is set to 0, and is not
displayed on the programming menu.
Wiring Alarms
• Make sure the load does not exceed the rated capacity of the relay.
• Several types of alarm configurations can be programmed and does
not require a change in the wiring. Refer to parameters AL, AH, P-
AH, P-AL, P-An.
• For details on Heater Break alarm, please refer to Appendix D and
the Heater Break Alarm Setpoint parameter "Hb" in the program-
ming section.
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PXZ4
PXZ9
(8-pin)
5
6
7
6 5 4 3 8
9
7
System Wiring Diagram
Example:
L
120V AC
N
Heater (3A or less)
PXZ4-RAY1-4V
–
+
Thermocouple
Input
Contact
Output
4 5
3
6
Power
7
2
85 to 264 VAC
50/60Hz
8
1