Frequently Asked Questions
What is the Allen-Bradley 2080-OF2?
It is a Rockwell Automation Micro800 plug-in analog output module featuring two non-isolated, unipolar voltage or current output channels for compatible programmable controllers.
How many analog output channels does the module provide?
The 2080-OF2 provides two analog output channels. Both channels are designed to generate appropriately configured analog command signals for connected field devices.
What voltage output range does the 2080-OF2 support?
The manufacturer's specified voltage output range is 0–10 VDC. The voltage load must be at least 1 kΩ, and the maximum output load current is 10 mA.
What current output range is supported?
The published current output range is 0–20 mA. The total resistive load, including cable resistance, must not exceed 500 Ω.
Can the module be used for a 4–20 mA control signal?
Its published hardware range is 0–20 mA. A 4–20 mA command may be produced within this range by applying the appropriate PLC scaling, but it should not be confused with a separately specified native 4–20 mA output range or with the configuration features of the 2085-OF4.
Does the module support negative voltage outputs?
No. The 2080-OF2 provides a unipolar 0–10 VDC voltage range. It is not specified for bipolar -10 to +10 VDC output operation.
What is the module's analog output resolution?
Rockwell Automation specifies 12-bit unipolar resolution with an output count range of 0–65535. The available analog resolution and controller-side data representation should be handled according to the manufacturer's scaling documentation.
What is the output accuracy?
Overall accuracy is specified as ±1% of full scale at 25°C for both voltage and current terminals. Across the -20 to +65°C temperature range, the published maximum output errors are ±1.5% for voltage and ±2.0% for current.
How fast does the 2080-OF2 update its outputs?
The manufacturer specifies a maximum D/A conversion time of 2.5 ms for all channels and a step response time of 5 ms to reach 63% of a full-scale change.
Are the two output channels electrically isolated?
No. The 2080-OF2 is a non-isolated analog output module. Rockwell Automation specifies no channel-to-channel isolation and no output-group-to-bus isolation.
Which Micro800 controllers are compatible?
The module is intended for supported Micro820, Micro830, Micro850 and Micro870 controllers with compatible plug-in slots. Confirm the specific controller catalog number, available slot and firmware or programming-software requirements.
Does the module require a separate expansion I/O bus terminator?
No. The 2080-OF2 is a Bulletin 2080 plug-in module rather than a Bulletin 2085 expansion I/O module. The 2085-ECR terminator applies to compatible expansion I/O assemblies, not to the plug-in module itself.
Does the module have output protection?
Yes. Rockwell Automation lists open-circuit protection, short-circuit protection and output-overvoltage protection. These features do not eliminate the need for correct wiring and suitable connected loads.
What is the recommended maximum analog cable length?
The manufacturer specifies a maximum shielded cable length of 10 m. Appropriate cable routing and grounding are important because the analog output circuitry is non-isolated.
What is the difference between 2080-OF2 and 2085-OF4?
The 2080-OF2 is a two-channel controller plug-in module with 0–10 VDC and 0–20 mA unipolar outputs. The 2085-OF4 is a four-channel expansion I/O module with additional selectable analog ranges, a different electrical interface and different installation requirements. They are not direct physical replacements.
What is the difference between 2080-OF2 and 2080-IF2?
The 2080-OF2 generates two analog output signals. The 2080-IF2 receives and measures two analog input signals. One is an output module, while the other is an input module.
Can the 2080-OF2 be installed while the PLC is powered?
No. Disconnect the appropriate controller and field power sources before installing or removing the plug-in module. Follow the manufacturer's electrical safety and wiring instructions.
What should be checked before ordering?
Confirm the exact catalog number 2080-OF2, two unipolar non-isolated outputs, 0–10 VDC or 0–20 mA signal requirements, 12-bit resolution, compatible Micro800 controller and plug-in slot, signal scaling, load resistance, 24 VDC power consumption, shielded cable requirements and open-type enclosure installation. Use Rockwell Automation publications 2080-TD001, 2080-UM004 and 2080-WD004 for technical verification.