Description
16-point DC input module optimized for 24 VDC systems, designated as current-source type (PNP style). Provides higher channel density compared to 8-point modules.
The Polar Energy Assessment:
The G6I-D22B offers 16 DC inputs and is typically the current-source variant used where PNP wiring is required. It’s photocoupler-isolated and intended to maximize digital input density in the G6 rack while maintaining typical industrial input thresholds and protection. Use it where many 24 VDC sensor inputs must be aggregated without needing individual 8-point modules.
Pros
- Higher channel density: 16 inputs per module helps conserve rack slots.
- Current-source variant fits PNP sensor wiring conventions.
- Photocoupler isolation improves immunity to transients.
Limitations
- Current-source only: incompatible with some NPN wiring unless reconfigured.
- More channels mean more cabling at the terminal block so routing can get messy.
- Some sellers list certain G6 parts as discontinued or limited stock; verify availability.
Typical use cases
- Mass collection of 24 VDC sensor signals (photoelectric sensors, proximity switches) in medium-density I/O cabinets.

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