4. Wiring connection
Warning
Turn the power supply to the instrument off before wiring or checking it.
Working or touching the terminal with the power switched on may result in Electric
Shock causing severe injury or death.
•
OUT1 : Control output 1 (Heating output)
•
OUT2 : Control output 2 (Cooling output)
•
A1
: Alarm 1 output
•
EVT
:
Event output (A2 output, Heater
burnout alarm output, Loop break
alarm
output)
•
CT
: CT input
•
SV2
: Main setting 2 (SV2)
•
RS-485 : Serial communication (RS-485)
•
TC :
Thermocouple
•
RTD : Resistance temperature detector
•
DC
: DC current, DC voltage
(Fig.
4-1)
Notice
•
The terminal block of the TP40A is designed to be wired from the left side.
The lead wire must be inserted from the left side of the terminal, and fastened by the
terminal screw.
•
Dotted lines show options.
•
Use a thermocouple and compensating lead wire according to the sensor input specification of
this controller.
•
Use the 3-wire RTD which corresponds to the input specification of this controller.
•
This controller does not have built-in power switch, circuit breaker or fuse. Therefore, it is
necessary to install them in the circuit near the external controller.
(Recommended fuse: Time-lag fuse, rated voltage 250V AC, rated current 2A)
• When using a 24V AC/DC for the power source, do not confuse the polarity when it is
DC.
•
When using a relay contact output type, externally use a relay according to the capacity of
the load to protect the built-in relay contact.
•
When wiring, keep input wires (thermocouple, RTD, etc.) away from AC sources or load
wires to avoid external interference.
•
Do not apply a commercial power source to the sensor connected to the input terminal nor
allow the power source to come into contact with the sensor.
Lead wire solderless terminal
Use a solderless terminal with isolation sleeve that fits in the M3 screw as shown below.
The torque is approximately 0.6N•m to 1.0N•m.
Solderless
terminal
Manufacturer
Model name
Tightening torque
Nichifu Terminal Industries CO.,LTD.
1.25Y-3
Y type
Japan Solderless Terminal MFG CO.,LTD.
VD1.25-B3A
0.6N•m
Nichifu Terminal Industries CO.,LTD.
1.25-3
Max. 1.0N•m
Round type
Japan Solderless Terminal MFG CO.,LTD.
V1.25-3
3.2mm
5.8mm or less
(Fig.
4-2)
3.2mm
5.8mm or less
4
