Product Overview
The Allen-Bradley 1746-IM16 is a discrete AC input module from the SLC 500 series, designed to interface high-voltage AC signals with a programmable logic controller. It provides sixteen input channels in a single group, each accepting 170-265 Volts AC at 47-63 Hertz. This module is engineered for reliable detection of AC field devices such as limit switches, push buttons, and proximity sensors in industrial environments. Its robust electrical isolation and noise immunity make it a trusted choice for demanding applications.
Technical Specifications Breakdown
Key parameters for the 1746-IM16 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Input Voltage Range | 170-265 VAC, 47-63 Hz |
| Number of Inputs | 16 |
| Backplane Current (5V DC) | 85 milliamps |
| Off-state Voltage, max | 30V AC |
| Off-state Current, max | 2 mA |
| Input Current (nominal) | 12 mA @ 120V AC |
| Inrush Current, max | 0.8 A |
| Inrush Duration, max | 0.5 ms |
| Signal Delay ON | 35 ms |
| Signal Delay OFF | 45 ms |
| Operating Temperature | 0...+60 °C (+32...+140 °F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Relative Humidity | 5 to 95% without condensation |
| Agency Certification | UL / C-UL listed, CE marked, C-Tick marked |
Industry Applications
This AC input module is commonly used in material handling, packaging, and conveyor systems where 200-240V AC sensors and switches are prevalent. Its high off-state voltage threshold (30V AC) ensures reliable distinction between ON and OFF states even in electrically noisy environments. The 16-channel density allows efficient monitoring of multiple field devices from a single slot, reducing overall system cost.
Installation & Setup Guidance
Install the module into any available slot in an SLC 500 chassis. Use a 1746-HT or 1746-HCA removable terminal block for field wiring. Ensure the input voltage is within the 170-265V AC range and frequency is 47-63 Hz. The module draws 85 milliamps from the 5V DC backplane; verify the power supply capacity. No external power supply is needed for the inputs as they are powered by the AC source.
Maintenance & Reliability
Periodically inspect the terminal block connections for tightness and signs of corrosion. Operate the module within the specified temperature and humidity range to maximize lifespan. The module is designed for continuous duty in industrial environments with proper enclosure protection.
Compatibility & Integration
The 1746-IM16 is compatible with all SLC 500 processors and chassis. It can be used in local, expansion, or distributed I/O racks. The module is UL listed and CE marked, meeting international safety and electromagnetic compatibility standards.
Selection Guide & Purchasing Advice
When selecting an AC input module, consider the voltage requirements and number of inputs. AutoDCSTech offers this module with fast shipping and expert support. Verify current lifecycle status before ordering.
Troubleshooting & Common Issues
If an input does not respond, check the field wiring and ensure the AC voltage is within range. Use a multimeter to measure voltage at the terminal. For intermittent faults, inspect for loose connections or moisture. The module's LED indicators show input status for quick diagnosis.
Availability & Condition at AutoDCSTech
| Part Number | 1746-IM16 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
