Purchase now: Allen Bradley 1746-OV32 High-Density Module
Purchase now: Atlantechdrives provides you the 1746-OV32, the ultimate high-density digital DC output module designed by Allen Bradley for the proven SLC 500 automation controller. When control panel real estate is at a premium and I/O counts are vast, the 1746-OV32 is the perfect solution. It packs 32 independent, solid-state 24V DC Sinking outputs into a single standard chassis slot. This effectively replaces two 16-point modules (like the OV16) or four 8-point modules, drastically reducing your hardware footprint, backplane power consumption, and overall project costs. It is highly sought after for complex packaging machines, extensive conveyor sorting systems, and large-scale semiconductor manufacturing nodes.
Technical Specifications of the 1746-OV32
The 1746-OV32 operates on standard sinking logic, pulling the load circuits to DC Common when activated. Because it houses 32 points, it utilizes a specialized 40-pin high-density connector instead of a traditional screw-terminal block.
- Part Number: 1746-OV32
- Module Type: High-Density Digital DC Output
- Compatible System: SLC 500 (1746 Series)
- Number of Outputs: 32 Solid-State Sinking points
- Operating Voltage: 10…30V DC
- Wiring Logic: Sinking (Provides ground path)
- Continuous Current per Point: 0.50 Amps at 30°C
- Signal Delay: On: 0.1 ms, Off: 1.0 ms
- Backplane Current Draw: 190 mA at 5V DC
Expert Installation Advice: The 1492 Pre-Wired System
Wiring 32 individual points directly to the front of a PLC module is a logistical nightmare. Expert Tip: You should never attempt to manually pin or solder wires to the 40-pin connector on the front of the 1746-OV32. Instead, you must utilize the Allen Bradley 1492 wiring system. This involves purchasing a pre-wired cable (such as the 1492-CABLE010H) that snaps directly into the front of the module, and routes the 32 signals down to a 1492 Interface Module (IFM) mounted on a DIN rail in your cabinet. The IFM provides neatly organized, externally fused screw terminals for your field wiring. This guarantees a clean, error-free installation and makes future troubleshooting significantly faster.
Maintenance and Thermal Load Balancing
High-density modules require careful thermal management. While each of the 32 points can technically handle 0.5 Amps, the total continuous current for the entire module cannot exceed 8.0 Amps. If you turn on all 32 outputs at the exact same time, the average current per point must drop to 0.25 Amps to prevent the module from experiencing a thermal shutdown. During the machine design phase, distribute your heavy-draw loads (like large solenoid valves) across multiple modules, and use the 1746-OV32 for lighter loads like indicator LEDs and micro-relays to ensure the internal silicon does not overheat.
Frequently Asked Questions (FAQs)
Q: Does the 1746-OV32 feature electronic short-circuit protection?
A: No, it does not. If a field device shorts out, the internal transistor may blow. This is why using an external 1492 IFM block with built-in fuses is highly recommended to protect your investment.
Q: Can I mix sinking and sourcing outputs on this module?
A: No. All 32 points on the 1746-OV32 are strictly dedicated to Sinking logic. They all share the same internal ground paths.
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Optimize your high-density DC sink wiring by installing this 32-point card in a 1746-A10 industrial rack.
