1746-IA16 | Allen-Bradley SLC 500 16-Channel AC Input Module
Introduction:
The Allen-Bradley 1746-IA16 is a 16-channel AC input module for SLC 500 systems, accepting 85-132 VAC signals for discrete device interfacing.
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Product Overview: What Is the 1746-IA16?
The Allen-Bradley 1746-IA16 is a digital AC input module designed for the SLC 500 programmable controller platform. It provides sixteen input channels that accept an AC signal voltage range of 85-132 volts AC. As a result, it serves as a critical interface between field devices and the controller's logic processor.
Input modules like this one represent the primary scan phase for executing a user program. Without detected input signals, the controller has no reference for program execution. Therefore, the 1746-IA16 delivers the real-time state of signaling devices for reliable processing in rugged, mission-critical environments.
Key Features and Technical Specifications
Engineers evaluating the 1746-IA16 should consider these field-proven parameters:
- Input Voltage Range: 85-132 Volts AC
- Input Channels: 16
- Operating Frequency: 47-63 Hz
- Backplane Current (5 Volts DC): 85 milliamps
- Signal Delay, ON: 35 milliseconds
- Signal Delay, OFF: 45 milliseconds
- Off-State Current: 2 milliamps
- Off-State Voltage, Max: 50V AC
- Slots Occupied: 1
- Terminals: 20 (terminals 18 and 19 are internally connected commons)
Notably, the removable terminal block allows module replacement without reconnecting input terminations. This reduces downtime during maintenance. The 1746-IA16 weighs 0.34 kg and measures 13 cm x 5 cm x 15 cm.
Installation and Setup Guidance
Installing the 1746-IA16 requires an available slot in an SLC 500 chassis. The module may be placed in fixed or modular hardware style controllers, locally or in an expansion rack. Since there is no limit on installation location, you can position it wherever chassis space permits.
However, any AC input device terminated to this module must be compatible with the SLC 500 input circuit inrush current. The module does not offer internal protection circuitry. Therefore, verify that field devices match the 85-132 VAC range and the inrush characteristics before wiring.
Compatibility and Integration Notes
The 1746-IA16 connects via I/O connection 1746-HT and 1746-HCA. It belongs to the SLC 500 AC input module family with an operating voltage category of 100-120VAC. For 200/240VAC operation, the counterpart part number is 1746-IM16.
Integration into existing SLC 500 systems is straightforward because the module uses the platform's standard backplane. However, confirm that your chassis power supply can deliver the required backplane current at 5 Volts DC.
Frequently Asked Questions
Q: What is the input voltage range for the 1746-IA16?
A: The module accepts 85-132 Volts AC.
Q: How many input channels does this module provide?
A: It has sixteen input channels.
Q: What is the signal delay for the 1746-IA16?
A: The ON delay is 35 milliseconds and the OFF delay is 45 milliseconds.
Q: Can I use this module for 240VAC applications?
A: No. For 200/240VAC operation, use the 1746-IM16 instead.
Q: What is the backplane current consumption?
A: It draws 85 milliamps at 5 Volts DC.
Product Support and Availability
PetroPartsOnline supplies the 1746-IA16 for critical oil and gas operations. This module is in stock and ready to ship. Contact PetroPartsOnline for parts suited to your application's requirements.