Order 1769-OB32 now to maximize your panel space efficiency
The Allen-Bradley 1769-OB32 is an ultra-high-density, 32-point solid-state digital output module designed for the versatile CompactLogix automation platform. Providing 24V DC sourcing logic, this module effectively doubles the output capacity per chassis slot compared to standard 16-point cards. It is engineered specifically for complex automated systems, packaging machinery, and large-scale manufacturing lines where control cabinet real estate is at an absolute premium and a high volume of actuators, pilot lights, and relays must be controlled simultaneously.
Technical Specifications
- Output Channels: 32 Solid-State Sourcing Outputs.
- Operating Voltage Range: 20.4 to 26.4V DC (Nominal 24V DC).
- Current Rating: 0.5 Amps per point.
- Maximum Module Current: 4.0 Amps total at 60°C.
- Hardware Delay: 0.1 ms (ON to OFF) / 0.1 ms (OFF to ON).
- Backplane Current Draw: 300 mA at 5V DC.
Comprehensive Technical Overview
The primary advantage of the 1769-OB32 is its exceptional spatial efficiency. By packing 32 discrete sourcing outputs into a single module footprint, engineers can dramatically reduce the physical size of the PLC rack, leading to smaller, more cost-effective control panels. In a sourcing configuration, the module supplies the positive voltage (+24V DC) to the load, which is securely grounded at the other end. This setup is the industry standard for minimizing accidental machine start-ups due to field wiring ground faults. The module features integrated electronic fusing to protect internal circuitry; however, external fusing is always recommended for maximum system resilience.
Advanced Installation Advice
Due to the high density of this module, wire management becomes a critical engineering task. Using a standard terminal block with 32 individual wires can lead to a cluttered and hard-to-maintain panel. We strongly recommend utilizing Allen-Bradley 1492 pre-wired interface cables and remote terminal blocks. This approach not only saves hours of labor during panel building but also significantly reduces the likelihood of wiring errors. Additionally, pay close attention to the power supply distance rating: the 1769-OB32 draws more current from the backplane than smaller modules and must be located within 8 slots of the CompactLogix power supply.
Expert Maintenance Tips
Thermal accumulation is the biggest enemy of high-density electronic modules. When utilizing all 32 points simultaneously, ensure that the total current draw does not exceed the 4.0 Amps module limit. Provide adequate spacing and active ventilation within the control cabinet to dissipate the heat generated by the solid-state switching components, guaranteeing a long operational lifespan.
Frequently Asked Questions (FAQs)
Q: Can I draw 0.5 Amps from all 32 points at the same time?
A: No. While each point can handle up to 0.5 Amps individually, the entire module cannot exceed a total of 4.0 Amps. You must balance your loads accordingly.
Q: Does the 1769-OB32 come with a removable terminal block?
A: High-density modules typically require a specialized high-density terminal block or a pre-wired cable assembly (such as the 1492 series), which must be ordered separately.
Q: Is this module hot-swappable?
A: No, the 1769 CompactLogix series requires the chassis power to be completely disconnected before removing or inserting any I/O module.
Related Components
If your system requires sinking logic instead of sourcing, explore the 1769-OV32T 32-point sinking output module for complete compatibility.
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