4.HYDRO UNIT
Engineering Data book
58
4
▼External input board
Feature
* “TCB-PCMO3E“ is used for the following external master controls.
1. Room thermostat input
2. Emergency shutdown input
Refer to “Function/Electric wiring diagram“ for feature of each control because connection is different according to
the control.
Function / Electric wiring diagram
Room thermostat input
2-3 : Room thermostat input for cooling mode
1-3 : Room thermostat input for heating mode
• Output enabled when either heating or cooling mode selected on room thermostat. (locally procured)
• Volt free details :
• Connection details :
Cooling connection :Terminals 3 (COM) and 2 (COOL) on TCB-BCMO3E (See Schematic below)
Heating connection :Terminals 3 (COM) and 1 (HEAT) on TCB-BCMO3E (See Schematic below)
Thermostat operation
Emergency shutdown input
S2 : Emergency stop input
• Non-voltage contacts
• Connection details :
Emergency stop :Terminals 3 (COM) and 1 (HEAT) on TCB-PCMO3E (See Schematic below)
CAUTION
• Be sure to prepare non voltage continuous point of contact for each terminal.
• Supplementary Insulation must be added to user touched to user touchabel part of switches.
Cooling Heating
on off on off
2 - 3 open close – –
1 - 3 – – close open
1
2
3
PJ17
CN211
TCB-PCMO3E
Connection
Cable
COM
Thermostat (locally procured)
COOL
HEAT
Cool
Hot
TCB-PCMO3E
1
2
3
PJ17CN210
S2
Locally procured
Connection
Cable
COM
COOL
HEAT
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