Description
Product Overview
The ABB AO650 3BHT300051R1 is an eight-channel analog output module designed for ABB S600 I/O and Advant Master process control systems. It converts digital output commands from the control system into analog electrical signals for compatible field devices, including control-valve positioners, actuators, and other equipment requiring continuous command signals. With 12-bit resolution and opto-isolation on each channel, the AO650 supports multiple output ranges within an established industrial I/O architecture.
The module supports current outputs of 0–20 mA, 4–20 mA, and ±20 mA, along with voltage outputs of 0–5 V, 0–10 V, 1–5 V, and ±10 V. This range of signal options allows the module to serve different control-loop requirements, provided each channel is configured for the correct output type and range. The individual channel isolation is particularly relevant in control cabinets where field wiring, grounding arrangements, and connected equipment can vary. The published product information identifies the AO650 as an S600 I/O module; it should not be treated as an independent networked analog controller or assumed to support generic Ethernet protocols.
For maintenance and procurement, the ABB AO650 3BHT300051R1 must be matched to the installed I/O system and the required field signal configuration. Before replacement, record the original channel assignments, output ranges, and connected-device requirements. The available product data does not reliably establish all electrical load limits, accuracy figures, or environmental ratings, so those values should be confirmed from the applicable ABB technical documentation. For a used or refurbished unit, request photographs of the actual module and documented functional testing rather than relying on a generic condition statement.
Product Introduction
The AO650 is intended for distributed process-control applications where several analog command signals must be generated from a compatible ABB control system. Its eight isolated output channels allow multiple field devices to be served by one module, while configurable current and voltage ranges support different types of receiving equipment.
During replacement, verify the installed hardware arrangement, channel configuration, field wiring, and controller engineering settings. After installation, measure the actual output at the relevant terminals and confirm that each receiving device responds correctly. Correct module identification alone does not guarantee that the configured output range or scaling will match the original installation.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model | AO650 |
| Part number | 3BHT300051R1 |
| Product type | Analog output I/O module |
| System family | S600 I/O / Advant Master |
| Output channels | 8 |
| Resolution | 12 bits per channel |
| Current output ranges | 0–20 mA, 4–20 mA, ±20 mA |
| Voltage output ranges | 0–5 V, 0–10 V, 1–5 V, ±10 V |
| Channel isolation | Opto-isolated per channel |
| Communication | Through the compatible I/O system; no standalone Ethernet protocol verified |
| Supply requirements | Confirm from the applicable ABB hardware documentation |
| Output load limits | Confirm for the selected signal range |
| Output accuracy | Not independently verified |
| Operating temperature | Not verified from the primary product data reviewed |
| Installation | Compatible S600 I/O installation arrangement |
| Protection rating | Not verified |
| Dimensions | Approximately 252 × 273 × 40 mm, as listed by supplier catalog records |
| Weight | Approximately 1.485 kg, as listed by supplier catalog records |
| Product condition | Confirm whether new, used, or refurbished |
Technical caution: Some reseller pages incorrectly attribute generic communication protocols, 24 V DC supply requirements, or unsupported accuracy figures to the . Do not use those claims for engineering design without a matching ABB manual or product specification.
AO650 3BHT300051R1
Related Products
- ABB S600 I/O modules: Related I/O components within the same broader system family.
- ABB analog input modules: Used to acquire analog process measurements rather than generate analog control commands.
- ABB Advant Master control equipment: Provides the control logic and I/O management for supported installations.
- Compatible S600 I/O connection hardware: Confirm the required mounting and connection components from the existing cabinet documentation.
These are related by application or system family, not confirmed drop-in replacements for the .
Frequently Asked Questions
Q1: What is the ABB 3BHT300051R1?
It is an eight-channel, 12-bit analog output module for ABB I/O and Advant Master process control systems.
Q2: Which output signals does the support?
Published specifications list current outputs of 0–20 mA, 4–20 mA, and ±20 mA, plus voltage outputs of 0–5 V, 0–10 V, 1–5 V, and ±10 V.
Q3: Are the output channels isolated?
Yes. ABB product information identifies each channel as opto-isolated. Check the applicable technical manual for specific isolation ratings if required by the application.
Q4: Does the support Modbus or Profinet directly?
The is documented as an I/O module. Standalone Modbus or Profinet support is not established by the reviewed product information.
Q5: Can another ABB analog output module replace the ?
Not automatically. Verify the hardware family, channel count, signal ranges, wiring, and controller configuration before considering another model.
Q6: What should I check when purchasing a replacement?
Confirm the complete part number, condition, connector integrity, compatibility with the installed system, and available test records. Request clear photographs of the actual unit.
Q7: How should the replacement be tested?
Follow the site’s approved commissioning procedure. Verify each configured channel against the controller command, measure the output signal, and confirm the connected field device responds as expected before returning the loop to service.
Procurement Recommendation
The ABB 3BHT300051R1 should be sourced against the exact installed I/O configuration. Confirm the required current or voltage output ranges, channel assignments, and receiving-device requirements before purchase. Ask the supplier for the actual unit’s label, condition declaration, and available functional-test records. After installation, verify every affected analog loop before returning the equipment to normal operation.
