5-2 Chapter 5: Testing SHB_U14
Electrical connections
What electrical
connections are
provided?
The following connections are always present:
• 50-pin ribbon cable
IR module circuit board
↔ IR components
• 4 pin connection
Sensor-CPU circuit board
↔ Circuit board temperature control
• 4-pin connection
Emitter circuit board
↔ Emitter case, one connection per emitter case
• 24 V plug
Connection plate
↔ Sensor-CPU circuit board
only connected for external power supply
• Bus connection (internal)
Connection plate
↔ Sensor-CPU circuit board
only connected for external bus link
The following connections are only used when applicable:
• 20-pin ribbon cable
IR module circuit board
↔ IR detectors 3 and 4
• 26-pin ribbon cable
Sensor-CPU circuit board
↔ Internal gas module / Oxygen sensor
Available connections for unused options:
• Conductors that are not needed are fitted with plugs, rolled together and wire tied
to a bracket.
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