ABB ERH Technical Manual
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ABB ERH Technical Manual

ABB ERH Technical Manual

Low-speed, high-volume variable-speed, exterior-rotor integrated motor drive
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ERH low-speed, high-volume
Variable-speed, exterior-rotor
Integrated Motor Drive
Technical manual and user's guide
© Copyright 2025 ABB. All rights reserved.
Specifications subject to change without notice.

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  • Page 1 — ERH low-speed, high-volume Variable-speed, exterior-rotor Integrated Motor Drive Technical manual and user's guide © Copyright 2025 ABB. All rights reserved. Specifications subject to change without notice.

  • Page 3: Table Of Contents

    — Table of contents 01 Introduction 1.1 Getting assistance from ABB 1.2 Safety notices 1.2.1 General safety 1.2.2 Safe start-up and operation 1.3 Electrical installation, mounting, start-up 02 General information and ratings 2.1 Type designation key 2.2 Nameplate descripions 2.3 Catalog numbers and ratings 03 Mechanical information and mounting 3.1 Receiving and inspection...
  • Page 4 — Table of contents 3.7.3 Customer responsibility 3.7.4 Testing conditions 3.7.5 Measurement parameters 3.7.6 Data recording 04 Electrical installation and planning 4.1 Control and power terminal access 4.2 Input/output, ground, terminal block 4.2.1 Mains power connection 4.2.2 Grounding 4.3 Fuse/breaker sizing 05 Control wiring 5.1 User control signals 5.2 Relay...
  • Page 5 — Table of contents 7.4 Percentage mode 7.5 ERH configurator software 7.5.1 Software connection and driver 7.5.2 Connect to the ERH driver 7.6 ERH configurator firmware update 7.6.1 Connect to the ERH driver 08 Parameters and alarms 8.1 Parameter navigation 8.2 Holding register menu...

  • Page 6: Chapter 1 Introduction

    Chapter 1 Introduction Overview The ABB ERH series of Integrated Motor Drives (IMDs) provide an integrated drive that simplifies installation and wiring, reduces cost and saves valuable panel space. Focused on variable-torque fan applications. This manual is intended to provide information needed for planning the installation, start-up, operating and serving of the ERH.

  • Page 7: Getting Assistance From Abb

    Getting assistance from ABB For technical assistance, contact your local ABB representative or Global-IMD_support@abb.com. Before calling, review the troubleshooting section later in this manual. You will be asked for the ERH model number or catalog number that is located on the nameplate.

  • Page 8: Safe Start-Up And Operation

    Suitably rated fuses should be fitted in the mains supply to the ERH, according to any local legislation or codes. Do not carry out any work on the ERH control cables when power is applied to the ERH or to the external control circuits.
  • Page 9 The ERH can start at power up if the enable input signal is present or Input Mode is “None” and previously set. The STOP function does not remove potentially lethal high voltages. ISOLATE the ERH and wait 10 minutes before starting any work on it.

  • Page 10: Chapter 2 General Information And Ratings

    Chapter 2 General information and ratings Overview This chapter contains information about the ERH integrated motor drive including how to identify the product, general information and ratings. Type Designation Key The type designation contains information on the specifications and configuration of the motor and drive integrated unit. The catalog model number label is contained on the motor nameplate.

  • Page 11: Nameplate Descripions

    Nameplate Descriptions The EHR nameplate is located on the side of the drive part of the IMD, where the lid is located. It includes the NEMA rating, ap- propriate markings, a catalog number and a serial number, which allows identification of each unit. It also contains electrical in- formation, reference Figure 2.1 and Table 2.2 for detail.

  • Page 12: Catalog Numbers And Ratings

    E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E Catalog numbers and ratings The ERH integrated motor drive is an all-in-one package designed for fan applications. Table 2.3 provides the electrical ratings of each of the standard available models.

  • Page 13: Chapter 3 Mechanical Information And Mounting

    Check the ERH rating label to ensure it is of the correct type and power requirements for the application. If the ERH is to be stored for more than 14 days before use, be sure that it is stored in a clean and dry environment and within a temperature range of –40°C to +60°C.

  • Page 14: Dimensions

    Regular maintenance: Schedule regular maintenance checks to identify and rectify any wear or potential failure points early. • Using a calibrated torque wrench, bolt the ERH to the end device using the following torque specifications. Improper securement can cause damage. Use a star pattern and rotate through bolts frequently to keep proper alignment. •...
  • Page 15 View of cable gland...
  • Page 16 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E View of motor face Figure 3.5.2: Size 13 dimensions Table 3.5.3 Size 17 dimensions...
  • Page 17 View of drive face...
  • Page 18 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E View of drive face...
  • Page 19 View of cable gland...
  • Page 20 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E View of motor face Figure 3.5.4 Size 17 dimensions...

  • Page 21: Drive And Motor Service

    Drive and motor service The drive and motor may be serviced independently. Contact ABB Integrated Motor Drives for part numbers and availa-bility of replacement parts. Warning: When replacing the drive module, it must be replaced with a complete drive unit with heatsink. The drive control board is thermally bonded to the drive heatsink.
  • Page 22 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E Step 3 Remove the four screws(G) that secure the drive housing(H) and remove it.
  • Page 23 Step 4 Remove the four screws(J) countersunk into the PCB board that secure the drive to the motor.

  • Page 24: Imd Thermal Managemant

    E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E IMD Thermal Management 3.7.1 Introduction...

  • Page 25: Measurement Parameters

    Airflow conditions: Evaluate under both adequate and insufficient airflow conditions to simulate TEAO scenarios • Duration: Conduct tests over extended periods to capture transient and steady-state thermal behaviors Note: Special test motors are equipped with resistant temperature detectors (RTDs) for thermal test-ing. Contact ABB sales to obtain a special order. 3.7.5...

  • Page 26: Chapter 4 Electrical Installation And Planning

    Electrical installation and planning Overview This chapter outlines the basic power wiring for the ERH external rotor motor drive and contains example for input power wiring, cable sizing recommendations, grounding guidelines and fuse breaker sizing. If problems arise after installation, please refer to the diagnostics and troubleshooting section of this manual.

  • Page 27: Input/Output, Ground, Terminal Block

    Caution: The drive cable cover is installed with an IP65 gasket. Caution should be taken when removing and re-attaching the cover to not damage the gasket. Danger: When the drive is connected to the mains, there is a risk that the motor could start unintentionally, which could lead to a dangerous situation and/or personal injuries.

  • Page 28: Grounding

    The ground cable must be atleast the same size of the Line cable sizes • Do not use a residual current device (RCD) with an ERH product • Protective earthing of the drive must always be performed in accordance with applicable local and international standards...

  • Page 29: Fuse/Breaker Sizing

    Fuse/breaker sizing Provide overload protection to avoid overheating of the cables in the installation. Overcurrent protection must always be carried out according to local and national regulations. Table 4.3 Fuse/breaker sizing Model Breaker Fuse 130 sizes, 1-phase motors 15A, 480Y/277VAC 6A, 600V 130 sizes, 3-phase motors 15A, 480Y/277VAC...
  • Page 30 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E Figure 5.1.1: Control signals Figure 5.1.2: Cabling of control signals The digital output “DO”...

  • Page 31: Relay

    Overview This chapter contains quick start information that allows first time users to quickly and easily configure the ERH for operation. Refer to chapter 8 for a complete list of the parameters along with their definitions and default values. The parameters can be accessed and programmed through the ERH Configurator...

  • Page 32: Factory Default Quick Start

    E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E The following figure provides an overview for the out of the box control and power connections.
  • Page 33 STEP 9 STOP the motor, disable the drive by opening the control switch (terminals 24V to DI1). CAUTION: If the potentiometer is turned to zero with the enable closed, the ERH will go into a standby mode. The drive is still...

  • Page 34: 6.2 Modbus Control Quick Start

    Note: The default input control mode is Modbus. STEP 1 Perform Mechanical and Electrical installation as per Chapters 4 and 5. STEP 2 Connect the ERH with the RS485 to USB interface to the PC. STEP 3 Launch the ERH Configurator software tool. Note: If the customer requested specific parameters, they will be pre-loaded.

  • Page 35: Chapter 7 Control Modes

    STEP 5 Type in the desired speed at which ERH should run, press enter, and the motor will accelerate at the acceleration parameter value until it reaches the Speed reference parameter. STEP 6 To stop, simply hit the big “Stop” button next to the table. If there are any faults, pressing “Reset” will clear it.
  • Page 36 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E 485 B RJ45 Breakout 485 A Connector To PC USB to RJ45 Example of PC to ERH connection...

  • Page 37: Software Connection And Driver

    1. Input register table: Shows in real time information about the motor control algorithm and other parameters. 2. Holding register table: Allows the user to change different parameters of the drive. 3. RAM holding register table: These are special holding registers that will only be used to control the drive but not to configure it.

  • Page 38: Connect To The Erh Driver

    STEP 3 Select the COMx port that matches the serial port on the PC. 7.5.2 Connect to the ERH driver Establish communications to the drive by pressing the connection icon. The Information window will in real time update the status of actions.

  • Page 39: Erh Configurator Firmware Update

    If the COM port is provided via a USB port, then the user must also have a USB to RS485 converter. It is possible to use the ABB ECS100U converter. If this is done, pins 4 & 5 on the RJ45 connector must be brought out via a break-out board to access those pins.
  • Page 40 Then, connect the 485A and 485B cables to the bottom row of the Isolated I/O connectors: No other connections are needed for this procedure. Step 1: Download the ERH configurator software from this ink: xx.xxxx.com and double-click on the downloaded "ERHconfigurator.exe" file to launch the ERH configurator:...
  • Page 41 Step 2: Make sure the communication speed is set to the default settings the drives come in: If not, press the configuration icon: And select speed: Press OK and hit the connect icon again. The message “NOT CONNECTED!” should disappear:...
  • Page 42 There are 3 levels of access: Press the login icon: Note: Developer level is needed for flashing, contact ABB tech support (global-IMD_support@abb.com) Select the access level “Level 3: Developer” Enter password.
  • Page 43 And the “Time Graph” will progress again. Step 6: Press the flash icon again. And select the file “.._user.kld”, the up-to-date version of the IO firmware you are flashing. Wait for the progress bar to complete again. Check to make sure the "version" register matches the new version. Example is V2 for version 2: Step 7: Do a startup test to verify that the drive and motor are running properly After any motor testing procedure, enter the password again (it logs out after the update is finished), and restore the communication speed by changing the “Baudrate”...

  • Page 44: Chapter 8 Parameters And Alarms

    Holding Registers” function or written with either the 0x06 “Write Single Register” or the 0x10 “Write Multiple registers” functions. Note: Contact support (global-IMD_support@abb.com) with the motor spec number for default parameters values. Parameter navigation To view the general drive parameters, select the button from the menu bar.

  • Page 45: Holding Register Menu

    Holding register menu The holding parameter list contains the following sub menu list for drive adjustments: • Application parameters • I/O configuration • Communication • Current/power limits • Dynamics/speed stability • Motor parameters • Temperature • Configurable limits • Counters •...
  • Page 46 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E IO configuration Name Description...
  • Page 47 Communication Name Description Default Units Modbus address Address assigned to ERH Modbus Par/Stop Sets the parity and stop bit configuration 8-None-2 8-None-2 8-Odd-1 8-Even-1 Baud rate Rate of communication 9600 9600 19200 36400 57600 115200 Com timeout Current/power limits Name...
  • Page 48 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E Motor parameters Name Description...
  • Page 49 Counters Name Description Default Units 1000 Status Internal flags of the interface microcontroller 1001 Motor version Motor firmware version 1002 Interface version Interface firmware version 1003 Hard. model Model number 1004 Modbus address Modbus address from 1 to 247 1005 Baudrate Communication speed 1006...

  • Page 50: Input Register Descriptions

    E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E Alarm log Name Description...
  • Page 51 0.001 peak Direct current Direct component of the motor phase current vector in peak value 0.001 peak Quadrature current Quadrature component of the motor phase current vector in peak value 0.001 Direct voltage Direct component of the motor phase voltage vector in peak value 0.001 Quadrature voltage Quadrature component of the motor phase voltage vector in peak value...

  • Page 52: Chapter 9 Toubleshooting & Maintenance

    E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E Digital output Value for the PWM duty of the digital output bool...
  • Page 53 Code Alarm Reset condition No alarm None Memory Manual reset Short circuit Manual reset Loss of synchronism Automatic reset 10 times, then becomes manual Low voltage with motor stopped Automatic reset Low voltage with motor running Automatic reset High voltage Automatic reset High IPM temperature Automatic reset...
  • Page 54 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E Memory Alarm Indicates an inconsistency in the CRC (cyclic redundancy check) bits of the parameter table.

  • Page 55: Periodic Inspection

    Temperature Derating One or more of the measured temperatures are closer to its maximum allowed value than the configured derating margin. Single Phase Mode If in a three phase, only two phases are connected, the maximum allowed power will be limited to P Periodic inspection A periodic inspection schedule for the drive and driven equipment promotes proper operation and reduces time.

  • Page 56: Single-Phase Solution

    E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E Drive output data Number of phases Maximum current...
  • Page 57 — Appendix A CE declarations of conformity and usage guides — Appendix B Options & kits...
  • Page 58 E R H VA R I A B L E - S P E E D , E X T E R N A L - R O T O R I N T E G R AT E D M O T O R D R I V E EC series, USB to RS485 Product specifications Manufacturer...
  • Page 59 Any reproduc- tion, disclosure to third parties or utilization of its contents – in whole or in parts – is forbidden without prior written consent of ABB. © Copyright 2025 ABB. All rights reserved. Specifications subject to change without notice.

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