Order now: Allen-Bradley 1769-OF8C Compact High-Density Current Output
Atlantechdrives provides you the 1769-OF8C, a high-density 8-channel analog current output module designed for the CompactLogix system. This module is the ultimate space-saving solution for large-scale process control, allowing for the management of 8 independent 4-20mA loops in a single expansion slot.
- Channels: 8 Single-ended Current Outputs
- Output Range: 0-20 mA, 4-20 mA
- Resolution: 16-bit
- Backplane Current: 145 mA @ 5.1V / 185 mA @ 24V
- Update Rate: 5 ms for all channels
- Full Scale Accuracy: ±0.1% at 25°C
Technical Performance: 16-bit Precision for Process Automation
Secure now the 1769-OF8C to achieve laboratory-grade accuracy in your 4-20mA control loops. This module is engineered with 16-bit digital-to-analog converters, providing 65,536 discrete levels of control. This level of granularity is vital for industries such as water treatment, food and beverage, and chemical processing, where precise valve modulation or pump speed control directly impacts batch quality. The 1769-OF8C features advanced diagnostics, including «Open Loop» detection for each channel. If a field wire is severed, the module instantly reports a fault to the controller, allowing for an immediate safety response. When you order the 1769-OF8C, you are gaining a high-density component that significantly reduces the overall cost and size of your I/O system without sacrificing resolution.
Installation Advice: Managing Current Loop Impedance
When installing the 1769-OF8C, the total loop impedance is a critical factor. Each channel can drive a load of up to 500 ohms. If the resistance of your actuator and cabling exceeds this, the module will be unable to maintain the 20mA setpoint, leading to «Under-range» errors. Always use high-quality shielded twisted-pair (STP) cable and ensure the 1769-ECR end cap is securely installed. The high-density nature of the 1769-OF8C means that all 8 channels share a common return (VDC-). Ensure your sensors and actuators are wired correctly to this common point to avoid measurement offsets. Sourcing your 1769-OF8C from Atlantechdrives ensures you get a unit with high-stability internal resistors, protecting the 0.1% accuracy of your loops.
Maintenance and Heat Management
The 1769-OF8C generates significant heat when all 8 channels are driving 20mA into a full load. Maintenance protocols must include verifying adequate cabinet ventilation. Check the front panel «OK» LED; a solid green light indicates the internal diagnostics have passed all power-up tests. Sourcing from Atlantechdrives provides the reliability of original Rockwell Automation components, ensuring long-term thermal stability in high-density racks.
FAQs
Q: Can I use the 1769-OF8C for voltage control?
A: No, the 1769-OF8C is strictly for current. For voltage outputs, you must use the 1769-OF8V.
Q: Does it support «Hold Last State» on communication failure?
A: Yes, each channel is software-configurable to either clear the output or hold its last value during a fault.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
Maximize your analog output density with this 8-channel current card, technically compatible with the 1769-L30ER processor.
