$ 96.54
Description Product Introduction The ABB ACH550-UH-097A-4 is an HVAC-specific drive from ABB’s ACH550 series—the go-to VFD for building automation applications like air handlers, cooling towers, chilled water pumps, and condenser fans. This unit delivers 97 A continuous output at 480 VAC, making it suitable for 75 HP (55 kW) motors. The “UH” suffix indicates a NEMA 1 enclosure (IP21), rated for indoor installation where drips and dust are minimal but no washdown. What separates the ABB ACH550-UH-097A-4 from general-purpose drives is the HVAC feature set. It includes a built-in PID controller that handles pressure, flow, or temperature loops directly—no external controller needed. The drive also supports BACnet MSTP, Modbus RTU, and N2 protocols natively, with an optional Ethernet adapter for BACnet/IP or Modbus TCP. In my experience, the ACH550 series is one of the easiest HVAC drives to commission. The startup wizard walks you through motor data, application type, and feedback configuration in under ten minutes. The “UH-097A-4” part number breaks down as: U = NEMA 1 enclosure, H = 480 VAC input, 097A = 97 A output, 4 = 3-phase 480 V. Key Technical Specifications Parameter Specification Model ABB ACH550-UH-097A-4 Series ACH550 (HVAC) Input Voltage 480 VAC ±10%, 3-phase, 50/60 Hz Output Current 97 A (continuous) Motor Power 75 HP (55 kW) at 480 VAC Overload Capacity 110% for 60 seconds Enclosure NEMA 1 (IP21), indoor Communication BACnet MSTP, Modbus RTU, N2 (standard); Ethernet options available Built-in PID Yes (pressure, flow, temperature, or custom) Control Method V/Hz, sensorless vector Ambient Temp -10°C to 40°C (derate above 40°C) Dimensions Approximately 22″ H x 12″ W x 9″ D (varies by frame) Weight Approx. 85 lbs (38 kg) Compliance UL, cUL, CE, RoHS Firmware / Software Versions & Upgrade Notes The ABB ACH550-UH-097A-4 contains firmware that is field-upgradable using the DriveStudio or Drive Composer software and a suitable communication adapter. Minimum firmware: Version 3.0 (shipped on units manufactured after 2010). Version 2.x units exist—check the label. Recommended firmware: Version 3.2 or later. Version 3.2 adds enhanced BACnet object support and fixes a rare Modbus RTU timeout issue. Software compatibility: DriveStudio 2.0 or later, Drive Composer Pro 1.5 or later. The free Drive Composer Starter can view parameters but cannot upgrade firmware. Upgrade procedure: Connect a PC to the drive’s control panel port or via the optional Ethernet adapter. Use the software to load the firmware file. Takes about 8 minutes. Do not interrupt power during upgrade. Rollback: Supported but requires a full parameter backup first. Downgrading firmware will reset all parameters to factory defaults. ⚠️ Field note: The ABB ACH550-UH-097A-4 has a control panel (standard on this model) that stores parameters. If you’re replacing a drive, you can move the control panel from the old drive to the new one. The panel holds the entire parameter set—power up the new drive with the old panel attached, and it asks if you want to restore parameters. Answer yes, and the drive is ready to run in under a minute. Compatibility & Replacement Matrix Original Model Replacement Model Compatibility Level Key Notes ABB ACH550-UH-097A-2 (older) ABB ACH550-UH-097A-4 Drop-in Same form factor, same wiring. The -4 revision is the current production. Direct swap. ABB ACH550-UH-097A-4 (same) ABB ACH550-UH-097A-4 Drop-in Direct replacement. Any -4 revision is interchangeable. ABB ACH550-UH-075A-4 (lower current) ABB ACH550-UH-097A-4 Upgrade path 075A is 75 A (60 HP). Upgrading to 97 A (75 HP) requires checking motor and feeder sizing. ABB ACS550-UH-097A-4 (general purpose) ABB ACH550-UH-097A-4 Drop-in (with parameter changes) ACS550 lacks HVAC-specific features (BACnet, built-in PID). The ACH550 is a functional upgrade if you need those features. Wiring is identical. Third-party VFD (75 HP) ABB ACH550-UH-097A-4 Needs adaptation Different programming, different communication mapping. Not a plug-and-play swap. Frequently Asked Questions Q: What motors can I run with this drive? The ABB ACH550-UH-097A-4 is designed for variable torque loads—fans, pumps, and blowers. It can run standard induction motors (squirrel cage) rated for 75 HP at 480 VAC. It is not recommended for constant torque applications (conveyors, extruders) unless you oversize the drive. For constant torque, use the ACS550 series. Q: Does this drive include a bypass? No. The ABB ACH550-UH-097A-4 is a standalone VFD. If you need a bypass (for manual run in case of drive failure), you need an external bypass panel or the ACH550-BYP series. The bypass version has the drive and contactors in a single enclosure. Q: How do I wire the BACnet communication? The ABB ACH550-UH-097A-4 has a built-in BACnet MSTP port on the control terminal block (terminals X1:1 and X1:2). Use shielded twisted-pair cable. Set the BACnet MAC address and baud rate in parameters 53.01–53.03. The drive is BACnet BTL-certified—it shows up as a BACnet device with 16 analog input objects, 16 analog output objects, and numerous BACnet standard objects. Q: My drive trips on “OVERCURRENT.” What should I check? First, verify the motor parameters (voltage, FLA, speed) are entered correctly. The ABB ACH550-UH-097A-4 has an autotune function—run it. If the drive still trips, check the motor and wiring for shorts. A common issue: the drive is oversized for the motor and the acceleration time is too short. Increase parameter 22.02 (Acceleration Time) to 20–30 seconds and try again. Q: Can I run this drive with a single-phase input? No. The ABB ACH550-UH-097A-4 requires three-phase input. Single-phase input will cause an input phase loss fault. For single-phase input applications, use the smaller ACH550 drives (up to 10 HP) that are rated for single-phase input. Q: What’s the difference between ACH550 and ACS550? ACH550 is the HVAC version with built-in BACnet, PID, and energy optimization for pumps and fans. ACS550 is the general-purpose version for constant torque applications. The ABB ACH550-UH-097A-4 has the same power section as the ACS550-UH-097A-4 but different firmware. You cannot convert one to the other without changing the control board. Q: How do I set up the built-in PID? Use parameters 40.01–40.10. The ABB ACH550-UH-097A-4 PID accepts a 4-20 mA or 0-10 V feedback signal. Set parameter 40.01 to “PID” to enable. Configure the feedback source (parameter 40.02), setpoint source (40.03), and PID gains (40.06–40.08). The drive will automatically regulate speed to maintain the setpoint. Q: My drive shows “COMM LOSS” to the building automation system. Check the BACnet or Modbus wiring. The ABB ACH550-UH-097A-4 has a 120 Ω termination resistor that can be enabled via dip switch on the control board. For long runs, enable termination at the last drive on the trunk. Also verify the baud rate matches the BAS controller. Q: What’s the warranty on this drive? New ABB ACH550-UH-097A-4 drives typically carry a 12-month warranty from the supplier. ABB’s standard manufacturer warranty is 12 months from date of manufacture or 18 months from date of shipment, whichever is earlier. Check with your supplier for specific terms. TPS02 PLC DSQC352B-3HNE00009-1/17 PLC PFTL101A0.5 DMC-2182 PLC REXROT-AB31-04 PLC A06B-6092-H245#H500 PLC Email: [email protected] Phone: 86 15340683922 Sales:Wu Jiedong Our products are guaranteed for 1 year, with new and original production stopped and imported spare parts. All prices listed on the official website are subject to confirmation by contact: Wu Jiedong (manager). Our product: brand new original packaging Our warranty: All new or repaired parts have a 12 month warranty period beginning Our payment: 100% telegraphic transfer of inventory items before shipment, conditions can be proposed! If you have any downtime spare parts that you cannot find, please feel free to call or use email to contact me. If there are issues that the product cannot solve, please contact me. Product prices can be negotiated. Please do not consider contacting me!
