Bender ISOMETER isoEV425 User Manual

Manual
EN
isoEV425_D00126_09_M_XXEN/03.2019
ISOMETER® isoEV425/
isoEV425HC
with AGH420 coupling device
Insulation monitoring device for unearthed
DC circuits (IT systems)
for the charging of electric vehicles
Software version: D0430 V2.xx/D0640 V2.xx (isoEV425)
D0586 V2.xx (isoEV425HC)

Bender ISOMETER isoEV425 Specifications

General

Brand	Bender
Model	ISOMETER isoEV425
Category	Measuring Instruments
Language	English

Summary

1. Important Information

1.2 Technical Support and Service

Information on contacting Bender for first-level support, repair services, and field service operations.

2. Safety Instructions

2.1 General Safety Instructions

2.2 Work Activities on Electrical Installations

Specifies that only skilled persons can perform installation, commission, and operation work.

2.3 Intended Use

3. Function

3.2 Functional Description

Explains how the ISOMETER® measures insulation resistance, voltage, and handles faults and alarms.

4. Installation, Connection, and Commissioning

4.1 Installation

4.2 Wiring Diagram

Illustrates the electrical connections and terminal assignments for the ISOMETER® and AGH420.

4.3 Commissioning

Details the steps for device calibration, self-testing, and initial functional checks after installation.

5. Operation of the Device

5.3 Menu "AL"

5.4 Menu "out"

7. Data Access using the Modbus RTU Protocol

7.1 Reading Modbus Registers

Instructions for requesting and reading data from the ISOMETER® using Modbus function codes.

7.2 Writing Modbus Registers

Procedures for modifying device parameters by writing to registers via the Modbus protocol.

7.3 Exception Codes

8. Modbus Register Assignment

8.1 ISOMETER® Device-Specific Data Type

Defines the data formats, including device name and measured values, for Modbus communication.

8.2 Channel Descriptions

Maps numerical values and codes to specific measured values and alarm messages for Modbus channels.