Wiring Instructions - Omega CN4420 Series Manual

WIRING INSTRUCTIONS

Warning
Be sure to use the rated power supply voltage and polarity.
CN4421-A (with alarm)
* For current input, install the 250Ω precision
resistor (accessory) before using the unit.
CN4421 (without alarm)
Current output, DC SSR driver output
RTD
*Voltage/current
B
–
B
A
+
Current output, DC SSR driver output
*Voltage/ –
current
+
RTD
(viewing from the back
of instrument)
+
–
5
4
3 6
–
2 7
+
1 8
Thermocouple
input
(viewing from the
back of instrument)
+
–
Contact output
6
5 7
4
B
3
B
–
10
2
A
+
1 11
Thermocouple
input
18
Contact output
–
~
Power supply
+
Alarm output
8
9
–
Power supply
+
~
250Ω
+
–