Overview
The Allen-Bradley 1746-IV16 is a current sourcing discrete input module designed for integration within the SLC 500 modular automation platform. This module has sixteen channels that accept a nominal input voltage of 24VDC with an operating voltage range of 10-30VDC. The module features sixteen sourcing input channels, ideally used for interfacing electrical signaling devices such as switches, auxiliary contacts, sensors and other devices that provide binary or ON/OFF signal states. The 1746-IV16 is a single-slot module that enables rapid prototyping and system expansion without redesigning the entire control platform.
Key Features
- Sourcing Configuration: The 1746-IV16 supports source wiring configuration, allowing the module to supply signal voltage to external devices that do not carry their own input voltage.
- Fast Response: The 1746-IV16 has a signal delay of 0.5 ms during off-state and 0.3 ms during on-state.
- Removable Terminal Block: The 1746-IV16 module comes with removable terminal blocks, eliminating the need to disconnect any wires and making module replacement easy.
- Signal Conditioning: It includes filter circuitry and optical coupling for signal noise reduction.
- LED Status Indicators: Troubleshooting becomes easier with LED indicators that show input status ratings.
- Flexible Scaling: Expansion rack and remote I/O racks are both supported by the 1746-IV16.
Technical Specifications
- Number of Inputs: 16
- Input Type: Sourcing Discrete (Digital)
- Nominal Input Voltage: 24V DC
- Operating Voltage Range: 10–30V DC
- Nominal Input Current: 8 mA @ 24V DC
- Maximum Power Dissipation: 3.6 W
- Signal On Delay: 0.3 ms maximum
- Signal Off Delay: 0.5 ms maximum
- Backplane Current Load @ 5V: 85 mA
- Operating Temperature: 0–60°C (32–140°F)
- Relative Humidity: 5–95% (non-condensing)
- Mounting: Single slot in SLC 500 chassis
- Terminal Connection: Screw-type, removable blocks
Typical Applications
This current sourcing DC input module works with general purpose DC inputs applications. Common uses include:
- Detecting on/off states of pushbuttons, limit switches, and proximity sensors
- Interfacing with pilot lights, solenoid feedback, and auxiliary contacts
- Status monitoring in packaging, bottling, and material handling systems
- Discrete device interfacing in machine tool and pump control applications
- Sensor signal acquisition in assembly and palletizing operations
Compatibility & Replacements
Compatible With
- SLC 500 fixed and modular processor platforms (1747-L5x series)
- SLC 500 expansion and remote I/O chassis
- Ladder Logic programming via RS-Logix 500 / Studio 5000
- EtherNet/IP gateways and remote I/O modules
- Rockwell Automation ControlLogix and CompactLogix with appropriate gateway modules
Replaces / Drop-In Replacement For
- 1746-IV16 earlier production runs and revisions (compatible across series)
- Similar capacity requirements previously met with 1746-IV8 (2 units required for 16-point equivalent)
Works With
- RS-Logix 500 / Studio 5000 Logix Designer environments
- AnyBUSâ„¢ communication gateways for PROFINET and PROFIBUS integration
- Standard 24V DC power supplies (10–30V rated)
- DIN-rail mounted terminal blocks and wiring accessories (1492 cable series)
