Product Overview
The Allen-Bradley 1746-IV32 is a high-density discrete input module designed for the SLC 500 programmable controller family. This 1746-IV32 module provides 32 channels of 24 Volt DC current-sourcing input, organized into four groups of eight channels each. It directly installs into any SLC 500 chassis, making it a versatile choice for expanding I/O capacity in existing control systems.
With a backplane current consumption of only 0.050 Amperes at 5 Volts DC, the 1746-IV32 minimizes power draw and helps maintain system efficiency. Its compact single-slot design simplifies installation and reduces panel space requirements.
Technical Specifications
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Series |
SLC 500 |
| Part Number |
1746-IV32 |
| Module Type |
24VDC input module |
| Number of Inputs |
32 |
| Number 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 |
| Signal Delay |
ON = 3 ms; OFF = 8 ms |
| Backplane Current (5V DC) |
106 milliamps |
| Operating Temperature |
0 to +60 °C (+32 to +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 Class I, Division 2, Groups A, B, C, D; CE marked; C-Tick marked |
Key Benefits
-
High Density: 32 inputs in a single slot maximize I/O capacity without expanding the chassis.
-
Fast Signal Response: With an ON delay of 3 ms and OFF delay of 8 ms, the 1746-IV32 ensures responsive monitoring of fast-changing field signals.
-
Wide Operating Range: Accepts 15-30V DC at 50°C and 15-26.4V DC at 60°C, accommodating various power supply conditions.
-
Reliable Isolation: Provides 1500V AC isolation from the backplane (tested for 60 seconds), enhancing system safety.
-
Robust Certification: UL, C-UL, CE, and C-Tick marks ensure compliance with international standards.
Applications
The 1746-IV32 is ideal for applications requiring dense digital input monitoring, such as:
- Machine tool control systems monitoring limit switches and proximity sensors.
- Material handling systems tracking part presence and position.
- Packaging lines detecting product flow and jam conditions.
Its 24VDC sourcing design makes it compatible with most industrial sensors and switches, simplifying wiring in new and retrofit installations.
Installation & Setup
Installing the 1746-IV32 is straightforward. Simply insert the module into any slot of an SLC 500 chassis (local, extended, or distributed I/O rack). Ensure the chassis power is off during installation. The module requires no external power supply beyond the backplane. Connect field wiring to the terminal block, observing the input voltage range and polarity. Each group shares a common, so verify that the wiring matches the group configuration.
Maintenance & Reliability
Designed for long service life, the 1746-IV32 has no moving parts and requires minimal maintenance. Periodically inspect the module for dust accumulation and ensure proper airflow around the chassis. The module operates reliably in temperatures up to 60°C and humidity up to 95% non-condensing. Its robust construction withstands vibration and shock, ensuring dependable performance in demanding industrial environments.
Selection Guide
When selecting the 1746-IV32, verify that your SLC 500 system has an available slot and that the backplane power budget can accommodate the module's 106 mA draw at 5V DC. Confirm the input voltage range matches your field devices. For assistance with compatibility or to place an order, contact PLC Source PRO — your trusted supplier for industrial automation spares.