• Model: TC-OAV081
• Brand: Honeywell
• Series: Honeywell Series C / Experion LS I/O
• Core Function: Provides eight configurable analog outputs
• Type: Analog Output Module
• Key Specs: 8 channels; 0–21 mA; ±10.4 V; 25 ms update rate

Honeywell system documentation identifies TC-OAV081 as an 8-point analog output module with 4–20 mA / 10 V non-isolated output.

Product Introduction

Honeywell TC-OAV081 is an 8-channel analog output module for industrial process-control systems. Each channel can provide current or voltage output, making the module suitable for control signals to valves, actuators, drives, and other analog field devices.

The published specifications give a 0–21 mA current range, ±10.4 V voltage range, and 25 ms update rate for all channels. Voltage resolution is 320 µV/count, while current resolution is 650 nA/count.

Key Technical Specifications

These specifications are supported by Honeywell’s system documentation and the corresponding technical-data listing.

Honeywell TC-OAV081

Installation & Configuration Guide

Estimated replacement time: 20–30 minutes, excluding commissioning.

Stage 1 — Pre-Installation

Estimated time: 5–10 minutes

⚠️ Follow the site’s LOTO and process-safety procedure before removing the module.

1. Confirm the affected control loop can be taken out of service.
2. Isolate the applicable power according to the approved procedure.
3. Wear an ESD wrist strap.
4. Photograph the existing module and terminal wiring.
5. Record each field-wire terminal number.
6. Confirm the replacement model is TC-OAV081.
7. Check the existing application for current-output or voltage-output configuration.

Stage 2 — Remove the Existing Module

Estimated time: 5 minutes

1. Verify the circuit is de-energized.
2. Label field wiring before disconnection.
3. Disconnect the terminal block carefully.
4. Release the module retaining mechanism.
5. Remove the module from the I/O assembly.
6. Inspect the connector and terminal block for damage or contamination.

Do not assume that a similar Honeywell analog-output module has identical channel characteristics.

Stage 3 — Install the Replacement

Estimated time: 5–10 minutes

1. Compare the replacement label with the removed unit.
2. Check the module and terminal-block type.
3. Insert the module into its designated position.
4. Secure the module correctly.
5. Reconnect the terminal block according to the wiring documentation.
6. Verify polarity and field-device wiring.
7. Compare every connection with the photographs taken before removal.

Important: Do not guess whether a loop is configured for current or voltage output. Verify it against the control-system configuration and wiring documentation.

Stage 4 — Power-On and Testing

Estimated time: 10 minutes

1. Perform a visual wiring inspection.
2. Restore power following the approved startup sequence.
3. Check module status indications.
4. Confirm the module is recognized by the control system.
5. Check each configured analog output.
6. Verify representative field-device response.
7. Confirm the control loop returns to normal operation.
8. Record the module serial number and replacement date.

For a current loop, verify the actual measured output against the commanded value. For voltage applications, measure the output at the appropriate test point and compare it with the engineering configuration.

Frequently Asked Questions

1. What is Honeywell TC-OAV081?

It is an 8-channel analog output module. Honeywell documentation identifies it as an AO module supporting 4–20 mA / 10 V non-isolated output configurations.

2. Can the eight channels output both current and voltage?

Yes. The published technical data specifies 0–21 mA current output and ±10.4 V voltage output. The actual configuration depends on the application.

3. How fast does TC-OAV081 update its outputs?

The specified module update rate is 25 ms for all channels. Output settling time is specified as less than 2 ms to 95% of final value with resistive loads.

4. What terminal block does it use?

The technical data identifies TC-TBNH, 20-position terminal block as the connection terminal block.

5. Is TC-OAV081 discontinued?

Several current industrial-part listings describe TC-OAV081 as discontinued, although replacement-stock and unused inventory may still be available through the surplus market. Treat availability as supplier-specific and verify condition before purchasing.

6. What should I check before ordering a replacement?

Match the exact model number, channel count, output type, terminal-block arrangement, and installed Honeywell system configuration. Do not substitute TC-OAH061, TC-OAV061, or another analog-output module merely because the modules have similar names; Honeywell lists these as different output configurations.

7. What is the main commissioning risk?

The practical risk is incorrect signal configuration or field wiring. A 4–20 mA control loop and a voltage-controlled device cannot simply be treated as interchangeable. Verify the loop drawing and engineering configuration before putting the channel back into automatic control.