Get now: Allen-Bradley 1769-OF2 Compact Analog Output Module
Atlantechdrives provides you the 1769-OF2, a high-precision 2-channel analog output module designed for the CompactLogix and MicroLogix 1500 platforms. This module is essential for applications requiring proportional control, such as commanding Variable Frequency Drives (VFDs), modulating valves, or providing setpoints to other specialized controllers.
- Channels: 2 Single-ended
- Output Ranges: 0-10V DC, 0-20 mA, 4-20 mA
- Resolution: 14-bit (unipolar)
- Backplane Current: 120 mA @ 5.1V / 120 mA @ 24V
- Converter Type: Resistor String
- Isolation: 30V continuous
Technical Architecture: High-Precision Signal Generation
Purchase now the 1769-OF2 to experience superior signal stability in your industrial processes. This module is engineered with a 14-bit digital-to-analog converter (DAC), which translates digital values from the Logix engine into 16,384 discrete voltage or current levels. This technical granularity is critical for precision tasks like maintaining consistent pump speeds in chemical dosing or managing air pressure in HVAC systems. The 1769-OF2 features software-configurable output ranges, allowing engineers to switch between voltage and current modes without changing hardware. Its design includes an integrated «Safe State» feature, where outputs can be programmed to hold their last value or move to a specific safety value upon a communication loss with the PLC, preventing equipment damage during network failures.
Installation Advice: Managing Output Impedance and Shielding
When installing the 1769-OF2, the impedance of the connected load is a vital consideration. In voltage mode, ensure the load resistance is 1k ohm or higher to prevent voltage drops. In current mode, the maximum loop impedance must be 500 ohms or less. To eliminate electromagnetic interference (EMI), which is particularly aggressive in analog loops near high-power motors, always use high-quality shielded twisted-pair (STP) cabling. Ground the shield at the PLC chassis ground only. Sourcing your 1769-OF2 from Atlantechdrives ensures you receive a unit with factory-certified DACs, protecting the accuracy of your command signals.
Maintenance and Hardware Integrity
Maintenance of the 1769-OF2 involves periodic verification of the output values using a certified multimeter. If you observe «Drift» in your command signals, check the stability of the 24V DC backplane power provided by the 1769-PA2/PB2. The front panel features an «OK» LED; if it is flashing red, a hardware fault has occurred. Sourcing an authentic 1769-OF2 from Atlantechdrives guarantees original high-grade components that resist the thermal aging common in industrial environments.
FAQs
Q: Does the 1769-OF2 support bipolar signals (like ±10V)?
A: No, the 1769-OF2 is strictly unipolar. For bipolar motion references, the 1769-OF4 is the recommended choice.
Q: Can I use one channel for voltage and the other for current?
A: Yes, each of the two channels is independently software-configurable.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
For basic analog control loops, this 2-channel output card provides precise voltage/current signals managed by the 1769-L24ER-QB1B CPU.
