Product Overview
Downtime in a ControlLogix chassis often traces back to a single failed output point. The Allen-Bradley 1756-OV32E solves that problem by putting electronic fusing on every one of its 32 sinking outputs. Instead of replacing an entire module when one channel faults, you get point-level protection that keeps the rest of the process running. This is a chassis-located output module built for 12-24 Volts DC field devices, with an operating voltage range of 10-30 Volts DC.
Technical Specifications
| Specification | Value |
|---|---|
| Outputs | 32-Point Electronically Fused |
| Voltage | 12-24 Volts DC |
| Operating Voltage Range | 10-30 Volts DC |
| Max Output Current per Point | 0.5 Amps at 50 Celsius |
| Max Output Current per Module | 16 Amps at 50 Celsius |
| Backplane Current at 5 Volts | 390 milliamps |
| Power Dissipation (Max) | 5.88 Watts at 60 Celsius |
| Isolation Voltage | 50 Volts Continuous |
| Removeable Terminal Block(s) | 1756-TBCH, 1756-TBS6H |
| Enclosure | None |
What the 32-Point Architecture Means for Your Panel
Thirty-two outputs in one slot changes how you design a panel. You reduce module count, free up chassis space, and cut the wiring labor that comes with spreading the same I/O across multiple cards. The 1756-OV32E draws 390 milliamps at 5 Volts from the backplane, so power budgeting stays predictable.
Current Ratings and Thermal Planning
Each point carries up to 0.5 Amps at 50 Celsius, dropping to 0.35 Amps at 60 Celsius. The module total reaches 16 Amps at 50 Celsius and 10 Amps at 60 Celsius. Maximum power dissipation is 5.88 Watts at 60 Celsius, which matters when you calculate enclosure heat load. Plan your cabinet airflow around that figure rather than guessing.
Where the 1756-OV32E Earns Its Place
Oil and gas operations rarely fail because of one output. They fail because a single shorted channel takes a whole card offline. Electronic fusing isolates that fault to the affected point, so the remaining 31 outputs keep driving valves, relays, and indicator circuits. That is the practical value of this module in upstream and midstream control rooms.
In water treatment and packaging lines, the same logic applies. High-density sinking outputs suit panels where space is tight and every slot counts. The 10-30 Volts DC range also tolerates the voltage sag common on longer field runs.
Integration and Compatibility
The 1756-OV32E is a ControlLogix series module, so it slots into an existing ControlLogix chassis alongside your current I/O. It uses the 1756-TBCH or 1756-TBS6H removable terminal blocks, which lets you swap a module without disturbing field wiring. Isolation is rated at 50 Volts continuous, keeping field and backplane circuits separated. If your architecture ties into a plant network, confirm gateway and cabling requirements with your supplier before commissioning.
Selection Checklist Before You Buy
Verify four things: your field devices are sinking type, your load per point stays under 0.5 Amps at 50 Celsius, your chassis has an open slot, and you have the correct terminal block on hand. Getting these right the first time avoids a second shipment. Oil AutoTech offers hands-on technical selection help for exactly this reason, and keeps fast-dispatch spares for oil, gas and industrial automation applications.
Please verify current lifecycle status and availability with Oil AutoTech before ordering.
Maintenance and Reliability
Electronic fusing removes the fuse-replacement cycle from routine maintenance. Inspect terminal connections periodically and confirm cabinet temperature stays within the 0-60 Celsius operating range. Humidity should remain between 5 and 95 percent without condensation. Because the module has no enclosure, keep the chassis clean and free of conductive dust. A stable thermal environment is the single biggest factor in long service life.
Contact Oil AutoTech today for pricing and availability.
