Product Overview
Are you struggling with reliable signal acquisition in your SLC 500 system? The Allen-Bradley 1746-IB16 digital DC sinking input module from Rockwell Automation delivers precise monitoring for 16 discrete inputs. Designed for the SLC 500 series, this module accepts a nominal 24VDC signal with a wide operating range of 10-30VDC, ensuring compatibility with various sensors and switches.
Technical Specifications Breakdown
Key parameters for the 1746-IB16 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Module Type | Digital DC Sinking Input |
| Number of Inputs | 16; Sinking input |
| Input Voltage | 24 Volts DC |
| Input Voltage Range | 10-30VDC |
| Nominal Input Current | 8mA @24VDC |
| Signal Delay (ON transition) | 8 ms |
| Backplane Current (5VDC) | 85 milliamps |
| OFF State Voltage (max) | 5.0V DC |
| OFF State Current (max) | 1 mA |
Industry Applications
This module excels in general-purpose DC input applications, such as monitoring limit switches, proximity sensors, pushbuttons, and auxiliary contacts from relays or contactors. With 16 sinking inputs grouped into one common terminal, it simplifies wiring in manufacturing lines, packaging machinery, and material handling systems. The 8ms signal delay ensures fast response for most industrial processes.
Installation & Setup Guidance
Mount the 1746-IB16 into any available I/O slot of a 1746 chassis. It supports sinking wiring configuration only. Use compatible I/O connection accessories like 1746-HT and 1746-HCA for termination. The module draws 0.050 A from the 5VDC backplane. Ensure the CPU supports the required number of I/O points before installation.
Maintenance & Reliability
Operate the module within 0 to 60 °C (32 to 140 °F) and 5-95% relative humidity. Store between -40 and 85 °C (-40 to 185 °F). The module withstands 30G operational shock and 2.5G vibration at 57-200 Hz. It offers 1500V electro-optical isolation between input terminals and logic. Regularly inspect connections and status LEDs for proper operation.
Compatibility & Integration
The 1746-IB16 works with any SLC 500 chassis and can be installed locally or in a distributed I/O rack via 1746 communication adapters (RIO or Ethernet). It is UL, CSA, and CE-certified, and rated for NEMA ICS 2-230 noise immunity.
Selection Guide & Purchasing Advice
When selecting a DC input module, consider the number of inputs and voltage range. The 1746-IB16 offers 16 sinking inputs at 10-30VDC. For reliable supply, contact SpareTechPLC to verify lifecycle status and availability before ordering.
Troubleshooting & Common Issues
If inputs do not respond, check the wiring configuration (sinking only) and verify the signal voltage is within 10-30VDC. Inspect the backplane connection and ensure the CPU supports the module. Use status LEDs to identify active channels.
