Description
Description
The Allen-Bradley 1756-IA32 is a 32-point high-density discrete AC input module designed for the ControlLogix platform. This module provides reliable signal sensing for 120V AC systems, offering 32 independent inputs within a single slot of a ControlLogix chassis. It features programmable input filtering to help mitigate signal noise and bounce, ensuring robust performance in industrial control environments.
Features
- 32-point discrete AC input density for space-efficient cabinet design.
- Supports a nominal input voltage of 120V AC with an operating range of 74-132V AC.
- Programmable input delay times (9 ms or 18 ms) for flexible signal processing.
- Electronic module keying to prevent improper installation in the chassis.
- Integrated status indicators for clear visual diagnostics of input states.
Technical Specifications
| Module Type |
Discrete AC Input |
| Input Points |
32 |
| Operating Voltage Range |
74-132V AC |
| Input Delay (Programmable) |
9 ms or 18 ms |
| Backplane Current (5V) |
165 mA |
| Power Dissipation (Max) |
6.1 W @ 60 degC |
| Thermal Dissipation |
20.8 BTU/hr |
| Off-State Current (Max) |
2.5 mA |
Installation Guidelines
- Ensure the ControlLogix chassis is powered down before inserting or removing the 1756-IA32 module.
- Use appropriate RTB (Removable Terminal Block) connectors for wiring; ensure all connections are secured to prevent intermittent faults.
- Maintain proper ventilation within the enclosure to ensure ambient temperature remains within the specified operating range, particularly as the module dissipates up to 6.1W.
- Follow standard ESD (Electrostatic Discharge) precautions when handling the module to prevent damage to internal circuitry.
- Ensure the module is fully seated in the chassis slot before engaging the locking mechanism.
FAQ
What is the primary function of the 1756-IA32?
This module serves as a digital input interface, converting 120V AC signals from field devices into logic levels compatible with the ControlLogix controller backplane.
Can I program the input delay?
Yes, the module supports programmable input delay times of either 9 or 18 milliseconds, allowing you to tune the input response to suit specific application requirements.
