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Allen-Bradley 1756-IA32 ControlLogix 32-channel AC digital input module (two groups of 16). Input voltage 74-132V AC, 10 mA per input, 250V AC channel isolation.
Allen-Bradley 1756-IB16 Series A ControlLogix 16-channel DC digital input module.
Allen-Bradley 1756-IB16D ControlLogix 16-channel discrete DC input module with diagnostics, organised into two isolated groups of 8 points. Input impedance max 8.25 kOhm at 132V.
Allen-Bradley 1756-IB16I ControlLogix 16-channel individually isolated DC input module. Input range 10-30V DC, nominal 24V DC, 2.0 mA at 24V DC.