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WIRING INSTRUCTIONS
Be sure to use the rated power supply voltage and polarity
PXZ4 socket type (standard)
Current output, SSR/SSC driving output
RTD
*Voltage/current
B
–
B
–
A
+
+
Thermocouple
input
When no alarms are provided
PXZ4 socket type (with alarm)
Current output, SSR/SSC driving output
B
*Voltage/
–
B
current
+
A
RTD
When alarms are provided
* For current input, install the 250Ω precision
resistor (accessory) before using the unit.
Wiring Power to Controllers
• Be sure to use the rated power supply voltage and polarity for the
unit to protect it against damage and to prevent the occurrence of
failure.
• Keep the power off until all of the wiring is completed to prevent
electric shock and abnormal operation.
• Keep the power supply wires separated from the input and output
wires.
• Power connections should be made with 18-gauge or larger insulat-
ed wire. Stranded wire improves noise immunity. Noise filters and
isolation transformers are recommended in case of noisy power
lines.
• When the Heater Break option is selected, use the same power line
for both the controller and the heater.
Wiring Inputs
There are two input categories available: Thermocouple/RTD or cur-
rent/voltage. Make sure you have the right type before wiring the
inputs. Refer to Table of Input Type Codes and set the parameter
"P-n2" accordingly.
Note: In order to minimize the risk of high frequency noise induced by
coils and windings in relays, solenoids, and transformers, use leads
which have braided sheath and ground one end of the sheath. Keep
your input leads separate from power and output leads. If you have
to bring the input signal from a long distance, a signal transmitter
might be needed to maintain an accurate reading; in this case, a unit
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(viewing from the back
of instrument)
+
–
Contact output
4
5
3
6
2
7
~
Power supply
1
8
(viewing from the back of instrument)
+
–
Contact output
6
5
7
Alarm output
4
8
3
9
–
2
10
+
~
1
11
Power supply
Thermocouple
input
250Ω
–
+
*Voltage/
PXZ7
Current input
Current output,
SSR/SSC driving output
+
1
1
Control output 1
2
3
3
–
4
5
~
Power supply
6
PXZ5, PXZ9
*Voltage/
Current
RTD
input
A
1
1
B
2
2
Current output
B
3
SSR/SSC driving output
+
5
Control output 1
7
–
Power supply
~
that accepts current/voltage input would be necessary.
Thermocouple
• Connect thermocouples directly to the input terminals whenever
possible.
• If using extension wires, make sure they are of the same thermocou-
ple material and grade; any dissimilar metal junctions will lead to
erroneous readings.
• Ungrounded thermocouples are recommended for optimal perfor-
mance and to prevent ground loops.
• Make sure the polarity is correct.
RTD Pt100
• Use a 3-wire Pt100Ω RTD whenever possible. All three wires must
have low lead resistance (less than 10Ω) and no resistance differen-
tials among them.
• If using a 2-wire RTD, jumper the two B-legs with a wire of equal
resistance.
• Make sure A and B leads are connected to the right terminals.
Current/Voltage
• The controller accepts 1-5V, 0-5V, 4-20mA, and 0-20mA DC signals. If
wiring for a voltage input, feed the signal directly to the input termi-
nals. For current inputs, first connect the 250Ω precision resistor
that comes with the unit.
• Make sure the polarity is correct.
6
RTD
A
7
7
B
8
8
B
9
Alarm 1
T.C.
+
–
(Upper limit alarm)
7
13
Alarm 2
8
14
(Lower limit alarm)
9
15
Heater break
alarm output
10
16
Common
11
17
CT input
12
18
Control output 2(on the cooling side)
Current output, SSR/SSC
12
10
driving output
+
–
Current output, SSR/SSC
T.C.
driving output
+
+
1
10
10
Control output 2
–
2
11
(on the cooling side)
3
12
12
–
4
13
Alarm 1 (upper limit alarm)
Alarm 2 (lower limit alarm)
5
14
Heater break alarm output
6
15
Common
7
16
8
17
9
18
CT input
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