Bender A-Isometer IRDH 275 - User Manual

Power in electrical safety
Operating Manual
A-ISOMETER® IRDH275
IRDH275B
Insulation monitoring device for
IT AC systems with galvanically connected
rectifiers and converters
and for IT DC systems
Software version IRDH275: D160 V1.4
Software version IRDH275B: D159 V1.4
TGH1361en/11.2009

Bender A-Isometer IRDH 275 Specifications

General

Brand	Bender
Model	A-Isometer IRDH 275
Category	Measuring Instruments
Language	English

Summary

1. Safety information

1.1 Use for the intended purpose

Defines the intended use of the insulation monitoring device.

1.2 Warranty and liability

Details warranty exclusion conditions and manufacturer liability.

1.4 Directions for installation

Provides guidance on installing the insulation monitoring device correctly.

2. Function

2.1 Device Characteristics (IRDH275;B)

Lists shared and specific features of IRDH275 and IRDH275B models.

2.3 Product & Function Overview

2.5 IRDH275 B Additional Functions

Details extra functions available for the IRDH275B model.

4. Connection

4.1 Wiring

Instructions for connecting the A-ISOMETER® terminals to the supply voltage.

5. Operation and setting

5.1 Operating features and displays IRDH275(B)

Describes the operating elements and displays of the IRDH275(B).

5.1.3 Function keys

Explains the functions assigned to each button on the device.

5.2 Menu structure and menu mode

Parameter Changes & Menu Exit

5.4 Menu ISO SETUP: Setting of the basic A-ISOMETER functions

5.4.1 Response values Alarm 1 and Alarm 2

Describes how to select response values for Alarm 1 and Alarm 2.

5.4.2 Operating principle of the alarm relays

Explains the N/O and N/C operation of alarm relays K1 and K2.

5.5 Menu ISO ADVANCED: Setting of the extended functions

Extended Function Settings

5.6 Menu COM SETUP: Setting the BMS interface

5.6.1 Bus address Addr:“ (IRDH275 B)

How to set the BMS bus address for the IRDH275B.

5.6.2 ISOnet function (IRDH275 B)

5.7 Menu PASSWORD

5.7.1 Activating and setting the password

How to activate and set a password for device protection.

6. Serial interfaces

Interface IRDH275

Interface IRDH275 B

6.1 RS485 interface with IsoData protocol (IRDH275)

Details data transmission and requirements for IsoData protocol.

6.2 RS485 interface with BMS protocol (IRDH275 B)

6.3 Topology RS485 network (IRDH275 B)

6.3.3 Wiring

6.4 BMS protocol (IRDH275 B)

6.4.1 BMS Master

6.4.2 BMS Slave

6.4.3 Commissioning of an RS485 network with BMS protocol

Step-by-step guide for commissioning an RS485 network with BMS protocol.

7. Technical data IRDH275(B)

7.1 Data in tabular form

Presents technical specifications in a tabular format.

General data

7.4 Ordering details

7.4.1 A-ISOMETER Models

Lists available A-ISOMETER® types, voltage ranges, and article numbers.