172-65188M-08 (
M-COS 3,16,21
Pressure Reducing Valve) 24 Jun 2015
17
Wiring
MC-2
Ground
Power
Supply
Motor
Pressure
Sensor
AC100V
or
AC200V
Red Black White
1 2 3 4 5 6 7 8
Class 3
Grounding
Class 3
Grounding
Red White Shield*
(+) (–)
1. Before arranging wiring, check the correct supply voltage values specified for the
controller unit and for the actuator (motor) once again.
2. Connections of the wires to the terminal board must be made securely with
insulated pressure-connection terminals.
3. To ensure safety, be sure to ground the controller unit and the actuator.
Grounding requirements: Class 3 grounding or better
(Use mild steel wires of 2 mm
2
(AWG 14) or larger size and of 100
Ω or less
resistance, extending up to 20 m.)
4. Wiring should be routed in the shortest distance practical, located at least 0.5 m
away from other pieces of equipment that can be noise-generating sources.
Wiring should never contact any exposed steam piping.
Cables used for wiring shall be as follows:
Power Cable
: min. 0.5 mm
2
(AWG 20) x 2-core
Motor Cable
: min. 0.5 mm
2
(AWG 20) x 3-core
Pressure Sensor : min. 0.5 mm
2
(AWG 20) x 2-core shielded wire
NOTE: Wiring for the shielded wire should be made only on the controller side
and not on the pressure sensor side.
(Shielded wire should never contact the pressure sensor case.)
5. To allow access for maintenance, provide 100 mm of clearance around the
actuator when arranging wiring.
6. Upon completion of wiring to the terminal board, fit the supplied insulation board
and fix it in securely in place.
* Wiring for the pressure
switch should be made
only when necessary.
