ABB HAC319AEV1 | ACS800 Control Board, In Stock

Description

Product Introduction (Anti-Template)

The ACS800 drive is a workhorse, but sometimes the main RDCU control board just doesn’t have enough screw terminals for all the signals you need. The ABB HAC319AEV1 solves that. It’s the I/O extension board that piggybacks onto the RDCU, giving you additional programmable inputs and outputs without taking up another slot or requiring a fieldbus module.

This board is essentially a signal multiplier for the drive. It connects via a short ribbon cable and expands the drive’s ability to interface with external relays, pushbuttons, and indicators. The value is in the density—adding eight more digital points or an extra analog channel in a tight cabinet, using the existing power supply and processor. For a machine builder or a plant retrofitting a line, it cleans up the panel and centralizes control wiring back to the drive.

Key Technical Specifications

Compatible Replacement Models

The HAC319AEV1 is specific to the ACS800 architecture. Here is how it relates to other ABB drive options.

• ✅ Drop-in Replacement: HAC319AEV1 (any revision)
  This board may have minor hardware revisions, but any board labeled HAC319AEV1 is a direct replacement. It will physically mount on any RDCU (RDCO, RDCU-01, -02, etc.) that has the mating connector. The I/O mapping is identical. Install the board, reconnect the ribbon cable, and the drive recognizes the additional I/O automatically in most cases.
• ⚠️ Software Compatible: RMIO Board (for ACS800)
  The RMIO is the main I/O board on the RDCU itself. It’s not a replacement for the HAC319AEV1; it’s the board the HAC319 connects to. If your RMIO has failed, you replace the entire RDCU. If your HAC319 fails, you replace just this piggyback board. They are complementary, not interchangeable.
• ❌ Hardware Incompatible: HAC319AEV2
  The “V2” suffix likely indicates a different I/O configuration or a board designed for a different drive series (like the ACS880). While it may look similar, the pinout on the ribbon cable or the mounting holes could be different. Verify against your RDCU documentation. In our experience, V1 and V2 are not cross-compatible without verifying the exact wiring diagram.

 Frequently Asked Questions (FAQ)

What RDCU boards is the HAC319AEV1 compatible with?
It is designed for the standard RDCU (RDCU-01, RDCU-02, RDCU-12) boards used in the ACS800. It mounts directly on top using the provided standoffs and connects via the dedicated I/O expansion port. If you have a very early or specialized RDCU variant, visually check that the board has the mating header before ordering.

How do I know if my HAC319AEV1 has failed?
The board itself has no status LEDs. You diagnose it by process of elimination. If the main drive is running and communicating, but the specific I/O points on this extension board are unresponsive or behave erratically, suspect the board. First, reseat the ribbon cable on both ends—we’ve seen more “failures” from loose cables than dead electronics. If the problem persists, replace the HAC319 board.

Can I add a HAC319AEV1 to an existing ACS800 drive?
Yes, if your RDCU board has the unused expansion header. You simply mount the board, connect the ribbon cable, and power up. The drive’s firmware should auto-detect the additional I/O. You will then need to go into the drive parameters (typically group 10 or 11) to configure what each new I/O point does (e.g., start/stop, reference, fault reset).

What is the difference between HAC319AEV1 and a standard fieldbus module?
Functionally, both add I/O, but they do it differently. The HAC319AEV1 adds hardwired I/O locally at the drive. A fieldbus module (like an RDCO or FIO) adds I/O remotely over a network (Profibus, DeviceNet, etc.). If you need to connect pushbuttons in the same panel as the drive, the HAC319 is the simpler, lower-cost solution. If you need I/O at the other end of the plant, use fieldbus.

My replacement HAC319AEV1 is causing a drive fault. What should I check?
First, power down and double-check the ribbon cable orientation. It is keyed, but it’s possible to force it. A reversed cable can short out the I/O power on the RDCU. Second, verify that the replacement board is seated properly on the standoffs and not shorting against any components on the RDCU below. If the hardware checks out, the fault may be a parameter mismatch—the new board may have a slightly different I/O configuration that requires adjusting the drive parameters.

Do I need to update firmware when installing a used HAC319AEV1?
No. The HAC319AEV1 is a passive I/O board—it has no firmware of its own. It simply passes signals through to the RDCU. The drive’s firmware handles all the I/O logic. A used board, provided it’s electrically sound, will work identically to a new one. However, we always recommend testing it on the bench with a 24V source to verify each input and output responds before putting it into critical service.

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