This document describes the DriveIT low voltage AC drives with embedded fieldbus (EFB) control Modbus®, Metasys® N2, APOGEE® FLN, and BACnet® protocols. It provides an overview of the features and characteristics of the ACH550-01/02/U1/U2 drives.
The ABB ACH550 series provides low‑voltage AC drives with embedded fieldbus (EFB) control. This manual includes safety guidelines, mechanical and electrical installation instructions, and detailed configuration steps for serial communication protocols such as Modbus, Metasys N2, APOGEE FLN and BACnet.
It also contains technical data, mapping tables for Modbus registers, point database definitions, and guidance for planning, wiring, termination and troubleshooting. The document is intended for installers, integrators and service technicians working with the ACH550‑01, ACH550‑02, U1 and U2 models.
| Power rating (ACH550‑01/UH) | 0.75 kW (90 kW) / 1 150 HP |
|---|---|
| Power rating (ACH550‑02/U2) | 110 kW (355 kW) / 150 550 HP |
| Communication interface | RS485 at terminals X1:28‑32 |
| Supported fieldbus protocols | Modbus, Metasys N2, APOGEE FLN, BACnet |
The ACH550 supports Modbus, Metasys N2, APOGEE FLN and BACnet (not available at the time of printing).
Set parameter 9802 COMM PROTOCOL SEL to the desired value (1 = Modbus, 2 = N2, 3 = FLN, 5 = BACnet).
Terminate the RS485 bus with 120 Ω resistors at both ends and avoid grounding the shield at multiple points.