Product Overview
When high-current DC output control is required in an SLC 500 system, the Allen-Bradley 1746-OVP16 delivers reliable performance. This Digital DC Output Module features 16 sinking outputs with a voltage range of 20.4–26.4 VDC, making it suitable for demanding industrial applications. With a backplane current of 250 mA at 5V, the 1746-OVP16 integrates seamlessly into existing control cabinets.
Part of the SLC 500 series from Rockwell Automation, the 1746-OVP16 is engineered for high-current loads. Its fused common and blown fuse LED indicator provide immediate visual feedback, while the processor error LED alerts operators to output shutdowns. This module is built for clean, dry industrial environments and operates in temperatures from 0 to 60 °C.
Technical Specifications
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1746-OVP16 |
| Series |
SLC 500 |
| Module Type |
Digital DC Output Module |
| Voltage Range |
20.4–26.4 VDC Sink |
| Outputs |
16 |
| Current per Output |
1.5–1 A |
| Current per Module |
6.4 A |
| Backplane Current (5V) |
250 mA |
| Applications |
High Current |
| Step Response |
60 ms in, 2.5 ms out |
The 1746-OVP16 output module provides 16 outputs with individual fusing and a common fuse LED. Each output can handle up to 1.5 A continuous current, with a module total of 6.4 A. The on-state voltage drop is 1V at 1A, and surge current capability is 4A for 10 ms per point. Off-state leakage remains below 1 mA, ensuring minimal power loss.
Key Features & Benefits
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High-Current Outputs: Each output supports up to 1.5 A, suitable for driving solenoids, contactors, and other inductive loads.
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Fused Protection: Individual fuses and a blown fuse LED indicator provide quick fault identification and short-circuit protection.
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Fast Response: Step response of 60 ms in and 2.5 ms out ensures timely switching for control loops.
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Diagnostic LEDs: Front-panel LEDs display I/O status and processor errors, simplifying troubleshooting.
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Removable Terminal Blocks: Color-coded RTBs allow easy wiring and module replacement without disturbing existing connections.
Industry Applications
In manufacturing lines, the Allen-Bradley 1746-OVP16 controls high-current actuators such as pneumatic valves and motor starters. Its 16 outputs and 6.4 A module capacity make it ideal for controlling multiple devices from a single module.
In material handling systems, the 1746-OVP16 manages conveyor motor contactors and sorting actuators. The fast step response ensures precise timing, while the fused outputs protect against short circuits that could halt production.
For process control applications, the 1746-OVP16 provides reliable on/off control for pumps and heaters. The 20.4–26.4 VDC sink range matches standard 24V industrial supplies, and the high-current design reduces the need for external interposing relays.
Installation & Setup
Mount the 1746-OVP16 in any SLC 500 chassis slot. Ensure the backplane connector aligns properly and secure the module with the locking screws. Connect the 24V DC supply to the module's power terminals, observing polarity.
Wire each output to its load, using the removable terminal blocks for convenience. The fused common configuration requires that all outputs share a common return. Verify that the total load current does not exceed 6.4 A per module and 1.5 A per output.
After wiring, power up the system and check the LED indicators. Each output LED should illuminate when the corresponding bit is set in the processor. If any fuse blows, the blown fuse LED will light, and the affected output will stop functioning.
Maintenance & Reliability
Inspect the 1746-OVP16 module regularly for signs of overheating, loose connections, or damaged wiring. The module's operating temperature range of 0–60 °C allows use in most industrial enclosures.
Check the fuses periodically, especially in applications with frequent short circuits. Replace blown fuses with the correct rating to maintain protection. Keep the front panel clean to ensure LED visibility.
The module's solid-state design offers long service life with minimal moving parts. The 30g operating shock rating ensures durability in vibrating environments. Radiated RF immunity of 10 V/m from 30–2000 MHz and 1 V/m from 2000–2700 MHz protects against electromagnetic interference.
Compatibility & Integration
The 1746-OVP16 is designed exclusively for the Allen-Bradley SLC 500 programmable logic controller system. It fits into any SLC 500 chassis and communicates with the processor over the backplane. No additional communication modules are required.
This output module is compatible with all SLC 500 processors, including the 5/01, 5/02, 5/03, 5/04, and 5/05 models. It can be used in both local and remote I/O configurations, depending on the system architecture.
When integrating the 1746-OVP16 into an existing system, verify that the backplane current consumption (250 mA at 5V) stays within the chassis power budget. The module's 16 outputs can be addressed individually in the processor's I/O image table.
Selection Guide & Purchasing Advice
Before purchasing the 1746-OVP16, confirm that your application requires a sinking DC output module with a 20.4–26.4 VDC range. If your loads are AC-powered or require sourcing outputs, consider other Allen-Bradley SLC 500 modules.
Check the total current draw of your loads to ensure it does not exceed 6.4 A per module. For higher currents, use multiple modules or external relays. Also, verify that your SLC 500 chassis has sufficient slots and backplane power.
When sourcing this module, choose a reputable supplier like PLC Source PRO to ensure genuine parts and reliable delivery. PLC Source PRO offers a wide range of industrial automation spares, including PLC modules, DCS components, and drives.