1746-IB32 | Allen-Bradley 32-Point DC Input Module Supplier

Introduction to the 1746-IB32

When your control system requires reliable signal acquisition from switches, sensors, or auxiliary contacts, the 1746-IB32 delivers consistent performance. This Allen-Bradley digital DC input module is part of the SLC 500 series, engineered to interface with 24VDC sinking inputs. With thirty-two input channels, it efficiently handles multiple binary signals in a single slot.

Manufactured by Rockwell Automation, the 1746-IB32 accepts a voltage range of 15 to 30V DC at 50°C and 15 to 26.4V DC at 60°C. Its backplane current draw at 5 volts is 0.05 A, making it energy-efficient for your chassis. The module offers a signal delay of 3 milliseconds for both ON and OFF transitions, ensuring responsive data capture.

Key Features and Technical Specs

• Thirty-two (32) sinking input channels for versatile wiring.
• Operating voltage range: 15 to 30V DC at 50°C; 15 to 26.4V DC at 60°C.
• Backplane current consumption: 0.05 A at 5 volts DC.
• Signal delay: 3 milliseconds for OFF-to-ON and ON-to-OFF transitions.
• Power dissipation: 0.20 watts per channel, 6.65 watts per module.
• Off-state current: 1 milliampere maximum.
• Shock rating: 30G for rugged industrial environments.

A distinctive spec is the 3 ms signal delay, which enables fast detection of input changes. This is critical in applications where timing precision affects process control.

Applications and Use Cases

General-purpose DC inputs make the 1746-IB32 suitable for monitoring pushbuttons, limit switches, proximity sensors, and other ON/OFF devices. In manufacturing lines, it can capture status signals from multiple stations simultaneously. Because of its 32-point density, it reduces the number of modules needed, saving chassis space. This module also works well in material handling systems where quick input response supports efficient sorting.

Installation and Setup

Install the 1746-IB32 into any available slot of a 1746 chassis, except slot 1 which is reserved for the SLC 500 controller. Before installation, ensure power is removed from the chassis, as this module does not support Removal and Insertion Under Power (RIUP). Use the removable terminal block (RTB) for wiring convenience; the RTB allows pre-wiring and easy module swaps. The module accepts 1746-HT and 1746-HCA I/O connection cables for field wiring.

Maintenance and Reliability

Routine inspection of the terminal block connections and module seating helps maintain reliable operation. The 1746-IB32 operates within 0 to 60°C and 5 to 95% non-condensing humidity. Its 30G shock rating ensures durability in vibration-prone environments. For long-term reliability, periodically verify that the backplane current draw remains within specifications.

Compatibility and Integration

The 1746-IB32 is compatible with any SLC 500 processor, including modular and fixed-style controllers. It can be installed locally in the same chassis as the processor, in an expansion I/O rack, or in a remote I/O chassis via an SLC 500 communication adapter. This flexibility allows system expansion without redesign.

Frequently Asked Questions

Q: What is the input voltage range of the 1746-IB32?

A: The operating voltage range is 15 to 30V DC at 50°C and 15 to 26.4V DC at 60°C.

Q: How many input channels does the 1746-IB32 have?

A: It has thirty-two (32) sinking input channels.

Q: What is the signal delay for the 1746-IB32?

A: The signal delay is 3 milliseconds for both OFF-to-ON and ON-to-OFF transitions.

Q: What is the backplane current draw of the 1746-IB32?

A: The backplane current draw is 0.05 A at 5 volts DC.

Q: Can the 1746-IB32 be used in remote I/O configurations?

A: Yes, it can be installed in a remote I/O chassis using an SLC 500 communication adapter.

Product Support and Availability

The 1746-IB32 is available from Petro Auto Tech. Please verify current lifecycle status and availability with Petro Auto Tech before ordering. In-stock units ship promptly to support your automation needs.