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THERMOSTAT TERMINALS AND WIRING
Diagram: page 3
1 Power Terminals
1
2
Line
Neutral
Out
Out
• Terminals 2 and 3 are joined electrically
• Terminals 5, 6 and 7 are joined electrically
NOTE: Do not remove Earth connecting wire.
2 Sensor/Failure Mode Select Terminals
1
2
3
Link 3-4 removed = Output OFF
Link 3-4 connected= output ON
• Terminals 1 to 3 allow for the connection of a three wire sensor.
• Terminals 3 to 4 allow the user to select the default heating status on
sensor error:
– Without a link fitted the heating will turn OFF if a sensor error
is detected (default)
– With a link fitted the heating will turn ON if a sensor error
is detected
3 Alarm relay
• Healthy situation: 1-3 is closed, 2-3 is open
• Alarm situation: 1-3 is open, 2-3 is closed
1 2 3
4 Voltage and current rating
Maximum switch current 32A resistive
Um = 253 Vac for all versions except Extended Voltage Range
Um = 277 Vac for all other versions
Note: Only Ex eb and Ex tb equipment certified cable glands or stopping
plugs which employ a sealing washer or gasket may be used.
6 | nVent.com/RAYCHEM
3
Neutral
Supply
4
4
5
230V
Earth
Supply
6
7
Earth
Earth
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