Here’s a crisp summary of the Allen-Bradley 1746-IB16(C) module:

 Electrical Characteristics

• Type: Digital DC input module (sinking)
• Input Channels: 16 discrete inputs
• Nominal Voltage: 24V DC
• Voltage Range: 10–30V DC
• Input Current: 8 mA 24V DC
• Signal Delay: 8 m s for both ON and OFF transitions
• Backplane Current Draw: 0.05 A 5V DC

 Module Configuration

• Input Grouping: Single group with one common terminal
• Wiring Type: Sinking configuration only
• Compatible Devices: Limit switches, proximity sensors, pushbuttons, relay contacts

 Physical Specs

• Dimensions: Approx. 24.5 cm × 16.5 cm × 5.5 cm
• Weight: Around 0.4–0.5 kg
• Mounting: Fits into any slot of an SLC 500 chassis