Product Introduction
When you need to control multiple DC loads efficiently and reliably, the Allen-Bradley 1762-OB32T Source Output Module delivers a high-density, solid-state solution. Part of the MicroLogix family, this module features thirty-two (32) channels arranged in two isolated output groups of sixteen (16) channels each. With a nominal output voltage of 24VDC and a wide operating range of 10.2–26.4 VDC, the 1762-OB32T is designed for demanding industrial environments. Its solid-state construction minimizes wear and tear, reducing maintenance costs and improving system uptime—key benefits for any cost-conscious operation.
Technical Specifications
The Allen-Bradley 1762-OB32T offers precise control and robust performance. Below are the key parameters derived from the product datasheet.
| Specification |
Value |
| Number of Outputs |
32 |
| Output Groups |
2 (16 channels each) |
| Nominal Output Voltage |
24VDC |
| Operating Voltage Range |
10.2–26.4 VDC |
| Output Current per Channel |
0.5 A @ 60°C (140°F) |
| Output Current per Group |
2.0 A @ 60°C (140°F) |
| Output Current per Module |
4.0 A @ 60°C (140°F) |
| Surge Current |
2.0 A (repeatable every 2 s @ 60°C for 10 ms) |
| Minimum On-State Current |
1 mA |
| Heat Dissipation |
3.4 W |
| Wire Size |
22, 24, and 26 AWG |
| Isolation Rating |
1200V AC for 2 s or 1697V DC for 2 s |
The low heat dissipation of 3.4 W extends component life, while the robust isolation ensures reliable operation in harsh environments—reinforcing the long-term return on investment.
Industry Applications
The Allen-Bradley 1762-OB32T is well-suited for a variety of DC load control tasks. Typical applications include energizing indicating lights, sounding devices, solenoid-actuated valves, and small DC motors. In automated assembly lines, the module’s high-density output reduces the number of modules needed, saving panel space and wiring costs. For material handling systems, the solid-state outputs respond quickly (0.5 ms turn-on, 4.0 ms turn-off) and eliminate mechanical relay wear, leading to lower maintenance and higher throughput.
Installation and Maintenance
Proper installation is critical for maximizing the lifespan of the Allen-Bradley 1762-OB32T. The module should be mounted in an enclosure with a flame-spread rating of 5VA, V2, V1, V0 (or equivalent) to prevent fire risk. Ensure the enclosure is only accessible by a tool to meet safety standards. The module is designed for Pollution Degree 2 environments and can operate at altitudes up to 6562 feet without derating. For wiring, use 22, 24, or 26 AWG wire and observe proper polarity for source wiring. Regular inspections should verify that the output voltage stays within the 10.2–26.4 VDC range and that the ambient temperature does not exceed 60°C (140°F). These simple steps help prevent common issues like overcurrent or thermal stress, preserving the module’s reliability and your operational efficiency.
Compatibility and Integration
The Allen-Bradley 1762-OB32T is designed for seamless integration with MicroLogix programmable controllers. It plugs directly into the MicroLogix chassis and communicates using the backplane protocol. No additional communication modules are required for basic I/O control. This compatibility simplifies system design and reduces the total cost of ownership. When upgrading from older output modules, the 1762-OB32T offers higher density and solid-state longevity, making it a cost-effective replacement.
Selection Guide and Purchasing Advice
Before purchasing the Allen-Bradley 1762-OB32T, verify that your MicroLogix controller supports the number of I/O slots required and that the operating voltage matches your system’s power supply. Ensure the load current per channel does not exceed 0.5 A and the total per module stays under 4.0 A. For applications requiring higher current, consider using interposing relays. UBEST Automation is a trusted supplier of genuine Allen-Bradley industrial automation parts. We stock the 1762-OB32T and provide expert support to help you select the right module for your application. Contact us for pricing and fast delivery.