Bender ISOMETER isoCHA425HV Manual page 4

Table of contents
3.1 Dimensions...................................................................................................................................................... 18
3.2 Installation........................................................................................................................................................18
3.3 Connection.......................................................................................................................................................18
3.4 Commissioning...............................................................................................................................................21
4 Operation.......................................................................................................... 22
4.1 Operating and display elements.............................................................................................................22
4.2 Menu overview...............................................................................................................................................24
4.3 Displaying measured values..................................................................................................................... 25
4.4 Setting the response values (AL)............................................................................................................ 26
4.4.1 Response values overview.........................................................................................................................26
4.4.2 Setting the response values for monitoring the insulation resistance......................................26
4.4.3 Setting the response values for undervoltage and overvoltage.................................................26
4.5 Configuring fault memory, alarm relays, and interfaces (out)......................................................26
4.5.1 Configuring the relays.................................................................................................................................27
4.5.2 Assigning the alarm messages to the relays...................................................................................... 27
4.5.3 Activating or deactivating fault memory.............................................................................................28
4.5.4 Configuring interface...................................................................................................................................28
4.6 Setting delay times and self test cycles (t).......................................................................................... 28
4.7 Setting device control parameters (SEt)...............................................................................................29
4.8 Reset to factory settings.............................................................................................................................29
4.9 Showing and deleting the history memory........................................................................................29
4.10 Querying software version (InF).............................................................................................................. 30
5 Data access via RS-485 interface.....................................................................31
5.1 Data access using the BMS protocol..................................................................................................... 31
5.2 Data access using the Modbus RTU protocol.................................................................................... 31
5.2.1 Reading out the Modbus register from the ISOMETER®.................................................................31
5.2.2 Writing the Modbus register (parameter setting).............................................................................32
5.2.3 Exception code...............................................................................................................................................33
5.3 Modbus register assignment.................................................................................................................... 34
5.3.1 Modbus measured value registers......................................................................................................... 34
5.3.2 Modbus parameter register...................................................................................................................... 37
5.4 IsoData data string....................................................................................................................................... 41
6 Technical data...................................................................................................42
6.1 Technical data isoCHA425HV................................................................................................................... 42
6.2 Technical data AGH420-1 and AGH421-1............................................................................................47
6.3 Connection (for ISOMETER® and AGH) (for ISOMETER® and ZE420)...........................................48
4 isoCHA425HV_D00404_04_M_XXEN/10.2023