AB-7350-U
16
3) Refer to Figs. 3 and 10 and correctly connect the wires to the M3.5 screw terminals. Note that the wires of the temperature
sensor, Display Panel, and RS-485 communication lines are connected to the connectors.
Figure 10. Terminals arrangement
4) Separate the power supply line from the signal lines. Do not lead the power supply line through the wiring port (knockout) for
the signal lines since the power supply line may generate noise causing operation error and failure.
5) Connect the wires of each line. After connecting the wires, lightly pull them from the wiring ports so that minimum wire slack
remains inside the actuator. Too long wire slack inside the actuator may block the terminal cover to close or may hold down
the reset switch and interrupt the operation. See Fig. 3 for the location of the reset switch.
6) Tighten the seal connectors of the wiring ports. On the wiring ports for Display Panel cable and temperature sensor (Pt100
input) cable, tighten the seal connectors until the clearance between the wiring port and the seal connector becomes
narrower than 0.04" (1 mm).
Cable may get twisted as you tighten the seal connector. In such a case, loosen and remove the seal connector and untwist
the cable, then re-tighten the seal connector.
Wires connection of the temperature sensor (Pt100 input)
Figure 13. 6-pin connector for temperature
sensor (Pt100 input)
Terminal
Wire color*
Description
Temperature
sensor for pipe
surface
Insertion-type pipe
temperature sensor
T1A
Red
Red
Pt100 A (supply water temperature)
T1B
White
Black
Pt100 B (supply water temperature)
T1B
White
White
Pt100 B (supply water temperature)
T2A
Red
Red
Pt100 A (return water temperature)
T2B
White
Black
Pt100 B (return water temperature)
T2B
White
White
Pt100 B (return water temperature)
Note:
Wire color of the insertion-type pipe temperature sensor shown in the above
table is the wire colors of the recommended cable.
1) Pass the 3-core cable of the temperature sensor (Temperature sensor for pipe surface/Insertion-type pipe temperature
sensor) through the actuator port for the temperature sensor (Pt100 input). (See Fig. 3 for the location of the port.)
Use AWG 18–22 x 3-core cable or equivalent for the insertion-type pipe temperature sensor.
2) Strip the wire sheath. Strip length is 0.28" (7 mm) (See Fig. 14.)
Figure
14.
Wire
sheath
strip
length
T1A T1B T1B
T2A T2B T2B
Seal
connectors
Max. 0.04" (1 mm)
clearance
Max. 0.04" (1 mm)
clearance
Figure 12. Clearance for seal connector connection
Wiring port for
valve sensor
Wiring port for
temperature sensor
(Pt100 input)
Knockout for
the wiring port
6-pin connector for
RS-485 communication
6-pin connector for
temperature sensor
(Pt100 input)
4-pin connector for
Display Panel
Figure 11. Connectors for the temperature sensor,
Display Panel, and RS-485 communication
0.28" (7 mm)
