ENMET ISA-40 - Manual (Page 8)

ENMET Corporation ISA-40 Oxygen Monitor
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3.2.2 Remote Sensor Assembly Wiring
See Figure 4 for location of terminal blocks and optional intrinsic safety barrier.
Sensor assemblies with intrinsic safety barriers cannot have an audio alarm.
Table 2: Remote Sensor Assembly Wiring (without Intrinsic Safety Barrier)
Channel Signal Control Unit Connection Sensor Connection
1 Audio Alarm (–) TB3 – 1 TBS – 1
1 Audio Alarm (+) TB1 – 1 Horn TBS – 2
1 Oxygen Cell (–) TB1 – 1 O2 – TBS – 3
1 Oxygen Cell (+) TB1 – 1 O2 + TBS – 4
2 Audio Alarm (–) TB3 – 2 TBS – 1
2 Audio Alarm (+) TB1 – 2 Horn TBS – 2
2 Oxygen Cell (–) TB1 – 2 O2 – TBS – 3
2 Oxygen Cell (+) TB1 – 2 O2 + TBS – 4
3 Audio Alarm (–) TB4 – 1 TBS – 1
3 Audio Alarm (+) TB2 – 3 Horn TBS – 2
3 Oxygen Cell (–) TB2 – 3 O2 – TBS – 3
3 Oxygen Cell (+) TB2 – 3 O2 + TBS – 4
4 Audio Alarm (–) TB4 – 2 TBS – 1
4 Audio Alarm (+) TB2 – 4 Horn TBS – 2
4 Oxygen Cell (–) TB2 – 4 O2 – TBS – 3
4 Oxygen Cell (+) TB2 – 4 O2 + TBS – 4
Table 2A: Remote Sensor Assembly Wiring(with Intrinsic Safety Barrier)
Channel Signal Control Unit Connection Sensor Connection
1 Oxygen Cell (–) IS1 – 2 TBS – 3
1 Oxygen Cell (+) IS1 – 3 TBS – 4
2 Oxygen Cell (–) IS2 – 2 TBS – 3
2 Oxygen Cell (+) IS2 – 3 TBS – 4
3 Oxygen Cell (–) IS3 – 2 TBS – 3
3 Oxygen Cell (+) IS3 – 3 TBS – 4
4 Oxygen Cell (–) IS4 – 2 TBS – 3
4 Oxygen Cell (+) IS4 – 3 TBS – 4
N OTE : These sensor assemblies cannot have an audio alarm.