Allen-Bradley 1746-OV16 – 16-Point DC Source Output Module | SLC 500 Platform
Engineering Background
The Allen-Bradley 1746-OV16 is a 16-point DC source (sourcing) digital output module designed for the SLC 500 modular I/O system. It is engineered to interface directly with field devices such as solenoid valves, motor starters, indicator lamps, and relay coils operating on 10–50 VDC. As part of Rockwell Automation’s proven SLC 500 family, this module delivers deterministic, high-density output control in demanding industrial environments.
Product Positioning
The 1746-OV16 occupies the high-density sourcing output tier within the SLC 500 I/O chassis ecosystem. It is the preferred choice for engineers who require compact footprint, reliable solid-state switching, and seamless integration with SLC 5/01 through SLC 5/05 processors. Its 16-channel architecture reduces chassis slot consumption while maintaining full diagnostic visibility through the SLC backplane.
Complete Technical Specifications
| Catalog Number | 1746-OV16 |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Platform | SLC 500 Modular I/O |
| Module Type | Digital Output — DC Source (Sourcing) |
| Number of Output Points | 16 |
| Output Voltage Range | 10–50 VDC |
| Output Current per Point | 1.0 A continuous |
| Maximum Load Current (Module) | 8.0 A total (all points combined) |
| Output Type | Solid-state transistor (sourcing) |
| Backplane Current Draw (5 VDC) | 185 mA |
| Backplane Current Draw (24 VDC) | 0 mA |
| Field Power Supply | User-supplied, 10–50 VDC |
| Isolation | Optical isolation between field and backplane |
| Output Indicator | LED per output point |
| Wiring Style | Removable terminal block (RTB) |
| Wire Gauge | 14–22 AWG |
| Operating Temperature | 0 °C to +60 °C (32 °F to 140 °F) |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5–95% non-condensing |
| Enclosure Rating | Open type — must be installed in suitable enclosure |
| Certifications | UL Listed, CE Marked, CSA Certified |
| Module Weight | Approx. 400 g |
| Compatible Processors | SLC 5/01, 5/02, 5/03, 5/04, 5/05 |
| Compatible Chassis | 1746-A4, 1746-A7, 1746-A10, 1746-A13 |
Proven Application Environments
- Discrete Manufacturing: Conveyor control, assembly line actuator switching, and end-of-line test fixtures requiring high-density sourcing outputs.
- Material Handling: Solenoid valve control for pneumatic cylinders, diverters, and sortation systems in distribution centers.
- Water & Wastewater Treatment: Pump motor starter control, valve actuation, and alarm annunciation panels.
- Food & Beverage Processing: Hygienic line control with solid-state outputs eliminating contact wear in high-cycle applications.
- Automotive Body Shops: Weld gun control, fixture clamping, and part-present indicator circuits.
- OEM Machine Builders: Compact panel designs where slot economy and proven SLC 500 compatibility are mandatory.
Engineering Advantages
- High-Density I/O: 16 sourcing outputs in a single slot reduces chassis cost and panel footprint versus 8-point alternatives.
- Solid-State Reliability: Transistor outputs eliminate mechanical contact wear, supporting millions of switching cycles without degradation.
- Optical Isolation: Full galvanic isolation between field wiring and SLC backplane protects the processor from field-side transients and ground loops.
- Per-Point LED Diagnostics: 16 individual output status LEDs enable rapid fault isolation without a programming terminal.
- Wide Voltage Tolerance: 10–50 VDC field supply range accommodates both 12 VDC and 24 VDC field device standards without module substitution.
- Removable Terminal Block: RTB wiring allows module replacement without rewiring field cables, minimizing MTTR in production environments.
- Backplane Compatibility: Drop-in compatible with all SLC 500 modular chassis — no firmware or configuration changes required when replacing a failed unit.
System Architecture & Signal Flow
The 1746-OV16 occupies one slot in any SLC 500 modular chassis (1746-Axxx series). The SLC processor writes output data to the module’s output image table via the SLC backplane at each program scan. The module’s internal logic latches the output states and drives the transistor output circuits accordingly. Each output channel sources current from the user-supplied field power bus through the load device to the common return. Optical isolators on each channel prevent field-side noise from coupling into the backplane logic. The removable terminal block (RTB) connects field wiring to the module face; the RTB can be unplugged for module swap while field wiring remains intact.
Sourcing & Quality Verification
- Origin: Konmask.com sources 1746-OV16 modules from authorized distributors and verified surplus channels with documented chain of custody.
- Inspection Protocol: Each unit undergoes visual inspection for label authenticity, connector integrity, and physical condition prior to listing.
- Functional Testing: Where applicable, modules are bench-tested against SLC 500 backplane to verify backplane communication and output switching function.
- Counterfeit Mitigation: Label verification, date code cross-reference, and physical marking checks are performed per Konmask incoming inspection procedures.
- Documentation: Rockwell Automation publication 1746-UM009 (SLC 500 Digital I/O Modules User Manual) governs all specification references on this page.
Procurement Process
- Confirm Compatibility: Verify your SLC 500 chassis model (1746-Axxx) and processor series (5/01–5/05) are compatible with the 1746-OV16.
- Check Field Voltage: Confirm your field devices operate within 10–50 VDC and require sourcing (PNP) output type.
- Verify Slot Availability: Ensure an open I/O slot exists in your chassis; the 1746-OV16 occupies one slot.
- Place Order: Add to cart and complete checkout at Konmask.com. Purchase orders accepted for qualified B2B accounts — contact support@konmask.com.
- Receive & Install: Module ships with RTB. Install per Rockwell publication 1746-UM009. No firmware download required.
Technical FAQ
Q: Is the 1746-OV16 a sourcing or sinking output module?
A: Sourcing (PNP). The module supplies current from the field power bus through the load. For sinking (NPN) applications, refer to the 1746-OB16.
Q: Can I mix 1746-OV16 with other SLC 500 I/O modules in the same chassis?
A: Yes. All SLC 500 modular I/O modules are slot-independent and can be mixed freely within any 1746-Axxx chassis.
Q: What is the maximum inrush current the module can handle?
A: The transistor outputs are rated for 1.0 A continuous per point. For inductive loads, ensure appropriate suppression (flyback diode or MOV) is installed at the load to protect the output transistors.
Q: Does the 1746-OV16 require any special configuration in RSLogix 500?
A: No special configuration is required. The module is auto-identified by the SLC processor. Output data is written directly to the output image file (O:x.0) in your ladder program.
Q: What is the difference between 1746-OV16 and 1746-OV32?
A: The 1746-OV32 provides 32 sourcing output points in a single slot at reduced per-point current ratings. The 1746-OV16 offers 1.0 A per point, making it preferable for higher-current loads such as solenoid valves and motor starters.
Q: Can Konmask provide a test report or inspection certificate?
A: Yes. Inspection documentation is available upon request for B2B orders. Contact support@konmask.com with your order number.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
