Allen-Bradley 1746-IV32 SLC 500 Discrete Input Module

Manufacturer

Allen Bradley

Category

PLCs

Product Line

SLC 500

Part Number

1746-IV32

GTIN

10662468092767

Weight

0.38 lbs (0.17 kg)

Signal delay

ON = 3 ms; OFF = 8 ms

Module Type

24VDC input module

No. of groups

4

Input voltage range

15 to 30V dc at 50° C; 15 to 26.4V dc at 60° C

On-state Voltage, min.

15.0V dc

Off-state voltage, max

5.0V dc

Off-state current, max

1.5 mA

Input current

5.1 mA at 24V dc

Storage Temperature

-40°C to +85°C (-40°F to +185°F)

Operating Temperature

0...+60 °C (+32...+140 °F)

Relative Humidity

5 to 95% without condensation

Agency Certification

UL / C-UL listed Class I, Division 2, Groups A, B, C, D CE marked for all applicable directives C-Tick marked for all applicable acts

Voltage Range

15-30 Volts DC Source

Inputs

32

Backplane Current (5 Volts DC)

106 milliamps

Off State Current

1 milliamp

Applications

Combination 120 Volts AC I/O

UPC

10662468092767

The Allen-Bradley 1746-IV32 is a Discrete Input module that is a component module of the SLC 500 product range. This module is a 24 Volt DC sourcing input module, with thirty-two (32) input channels grouped into four (4) of eight (8) channels each.

Each channel of this module operates at a voltage range of 15 to 30 Volts DC at 50 degrees Celsius and 15 to 26.4 Volts DC at 60 degrees Celsius. It has a backplane current consumption of 0.050 Amperes @ 5 Volts DC and 0 Amperes @ 24 Volts DC with a channel isolation from backplane of 1500 Volts AC for 1 minute.

The module’s channels have a maximum signal delay of 3 milliseconds for both On and Off transition. The minimum on-state voltage is 15.0 Volts DC while the maximum off state voltage is 5.0 Volts DC and maximum off-state current is 1.5 milliamperes. The nominal input current to this module is 5.1 milliamperes at 24 Volts DC. It has an individual channel heat dissipation of 0.20 Watts and total heat dissipation of 0.25 Watts.

The 1746-IV32 is available in four (4) series - specifically, Series A, B , C and D. Series A, B, and C come with a fuse per input common which means that four (4) internally installed, non-replaceable fuses are integral to this series. Series D modules do not have internal group fusing.

The 1746-IV32 may be installed to any SLC 500 chassis. Similarly, it can be used as input module of any SLC 500 processor. It may also be installed in a local I/O rack, extended rack, and distributed I/O rack.

The wiring diagrams include both decimal and octal numbers. To wire your module when used in an SLC system, use the decimal numbers. To wire your module when used in a PLC system, use the octal numbers.

Q1. How does the AB 1746-IV32 optimize high-density discrete input acquisition in sophisticated SLC 500 automation architectures?

A: The AB 1746-IV32 provides 32 digital input channels in a single-slot configuration, enabling efficient monitoring of multiple 24V DC field devices while maximizing rack space utilization within SLC 500 control systems.

Q2. What diagnostic capabilities does the AB 1746-IV32 offer for enhancing signal integrity and operational reliability?

A: The AB 1746-IV32 incorporates status indicators for each input point, allowing maintenance personnel to rapidly validate field signal conditions, troubleshoot wiring anomalies, and reduce system downtime.

Q3. Why is the AB 1746-IV32 considered a strategic choice for large-scale industrial input aggregation applications?

A: With its 32-channel input density and seamless integration into SLC 500 platforms, the AB 1746-IV32 simplifies field wiring management and supports extensive sensor and switch monitoring requirements in complex automation environments.

Q4. In what ways does the AB 1746-IV32 ensure compatibility with demanding industrial control infrastructures?

A: The AB 1746-IV32 is engineered for 24V DC sinking/sourcing input applications and is fully compatible with Allen-Bradley SLC 500 systems, making it suitable for manufacturing, material handling, and process control installations.

Q5. How can the AB 1746-IV32 contribute to improved system scalability and future-proof control system expansion?

A: The modular design of the AB 1746-IV32 enables users to expand input capacity without significant system redesign, providing a flexible pathway for accommodating additional field devices as operational requirements evolve.

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