Discrete Input Module 1746-ITB16 Allen-Bradley

Allen-Bradley 1746-ITB16 Fast Response Discrete Input Module

Core Technical Specifications

• Brand & Manufacturer: Allen-Bradley
• Series & Model: SLC 500 Series, 1746-ITB16
• Module Type: Fast Response Discrete Sinking Input Module
• Input Channels: 16 points in one common group.
• Nominal Input Voltage: 24 Volts DC.
• Operating Voltage Range: 10 to 30 Volts DC.
• Wiring Configuration: Sink wiring configuration.
• Signal Delay (Max): 0.3 ms ON and 0.5 ms OFF.
• Nominal Input Current: 8 mA per point at 24VDC.
• Backplane Current: 85 milliamps at 5VDC.

Detailed Performance & Design

• Off-State Specifications: Max 5VDC voltage and 1.5 mA current.
• High-Speed Capability: Supports reading pulses up to 1 kHz (2 kHz with Gray Code encoder).
• Processor Compatibility: Works with all SLC 500 processors. Optimized for SLC 5/03 and 5/04 with DII instructions.
• Power Dissipation: Maximum power dissipation of 3.6 Watts.
• Isolation & Filtering: Features optical coupling and filter circuitry for noise reduction.
• Diagnostic Indicators: Front-panel LEDs display real-time input status for easy troubleshooting.
• Connection: Supports connections from multiple sensors via removable terminal blocks.
• Installation Note: Does not support Removal Under Power (RIUP). Install only with chassis power off.
• Operating Temperature: Reliable from 0 to 60 °C (32 to 140 °F).
• Operating Humidity: 5% to 95% non-condensing.

Frequently Asked Questions (FAQ)

• Q: Is the 1746-ITB16 module new and genuine?
  A: Yes, we supply only brand new, original Allen-Bradley products.
• Q: How fast is this input module?
  A: It features very fast response, with signal delays as low as 0.3 milliseconds.
• Q: What is the 'sinking' wiring configuration?
  A: It means the module provides a path to ground (sinks current) for the connected field devices.
• Q: Can I hot-swap this module?
  A: No. The 1746-ITB16 does not support Removal Under Power (RIUP). Always power down the chassis first.
• Q: What is it typically used for?
  A: It is perfect for high-speed applications like reading encoder pulses or fast counter inputs.
• Q: Do you have this module in stock and what is your return policy?
  A: Yes, we stock it. We offer a 30-day return policy and ship via major carriers.