A-ISOMETERÂ® IRDH375 IRDH375B - Bender

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FunctionError message Meaning Steps to be takenSystem connection?Connection PE?Device error xNo low-resistanceconnection of terminalsL1, L2 tothe IT systemNo low-resistanceconnection of theterminals andKE to earth (PE)Internal deviceerror1. Check the wiring of terminal L1, L2 tothe IT system2. Press the test button3. Switch the supply voltage off and on.4. Check the fuses1. Check wiring of terminal and KE toearth (PE)2. Press TEST button3. Switch the supply voltage off and on1. Press TEST button2. Switch the supply voltage off and on3. Contact BENDERIf the on/off switching of the supply voltage is not possible for technicalreasons, a RESET of the process control can be carried out by pressingthe "ESC“, "RESET“ and "MENU“ key.16 TGH1352en/11.2004
Function2.5 Additional functions <strong>IRDH375</strong>BCurrent output for external measuring instrumentThe current output of <strong>IRDH375</strong>B provides 0(4)...20 mA. The current outputis galvanically isolated from the device electronics and the RS485 interface.The ISO SETUP menu, on page 43, allows to switch over between 0...20 mAand 4...20 mA.Real-time clockThe real-time clock serves as a time base for the memory and self test functions.At first, the correct time and date must be set in the menu "ISO AD-VANCED". If time and date are not set, a „C“ (clock) is flashing in thestandard display. In the event of a supply voltage failure, time and date willbe stored for at least thirty days.If the 24 h selv test is activated in the "ISO ADVANCED" menu, a special timeof day can be selected for the execution of the self test in the menu "TEST:12:00". Then a self test will be started automatically once a day exactly at thepreset time. If the 1 h auto test has been selected, the self test is automaticallycarried out every full hour.Interconnected IT systemsWhen using A-ISOMETERs® in IT systems, make sure that only one activeA-ISOMETER® is connected in each interconnected system. If IT systems areinterconnected via coupling switches, make sure that A-ISOMETERs® notcurrently used are disconnected and deactivated via a control system. IT systemscoupled via diodes or capacitances may also influence the insulationmonitoring process. Hence, also in this case a central control of the differentA-ISOMETERs® is required.Function input F1/F2 for connection or disconnection ofIT systems being monitoredThe A-ISOMETER® can be disconnected from the IT system and set toSTANDBY mode with the function input F1/F2. If the input F1/F2 is bridged,the connections L1/L2 are switched off via internal coupling relays, the measuringfunction is stopped and the message "STANDBY" appears on the display.Software version 1.4 or higher does not indicate the measuredinsulation resistance during the disconnection, but indicates the value> 10 MΩ. Furthermore, the alarm relays and alarm LEDs no longer providealarm messages. After opening the function input F1/F2, the connection tothe IT system will be restored and a completely new measuring cycle for in-TGH1352en/11.200417
Page 1 and 2: Operating ManualInsulationR =010KWf
Page 3 and 4: Table of Contents1. Safety informat
Page 5 and 6: Table of Contents5.6.1 Bus address
Page 7 and 8: 1. Safety information1.1 Use for th
Page 9 and 10: Safety information1.2.4 Inspection,
Page 11 and 12: Safety information1.4 Directions fo
Page 13 and 14: 2. Function2.1 Common characteristi
Page 15: Functionmessage, provided that the
Page 19 and 20: FunctionISOnet Function (COM SETUP)
Page 21 and 22: 3. Commissioning flow chart (threep
Page 23 and 24: Commissioning flow chart (threepart
Page 25 and 26: 4. Connection4.1 WiringIRDH375(B) h
Page 27 and 28: ConnectionLegend to wiring diagram:
Page 29 and 30: Connection4.2.2 Connection with AGH
Page 31 and 32: ConnectionIn case of current-contro
Page 33 and 34: 5. Operation and setting5.1 Operati
Page 35 and 36: Operation and setting5.1.3 Function
Page 37 and 38: Operation and settingTGH1352en/11.2
Page 39 and 40: Operation and setting5.2.1 Diagram
Page 43 and 44: Operation and settingDiagram ISO SE
Page 45 and 46: Operation and setting5.5 Menu ISO A
Page 51 and 52: Operation and setting5.8 Menu LANGU
Page 53 and 54: 6. Serial interfacesThe A-ISOMETERs
Page 55 and 56: Serial interfaces6.2 RS485 interfac
Page 57 and 58: Serial interfaces6.4 BMS protocol (
Page 59 and 60: Serial interfacesThe following tabl
Page 61 and 62: 7. Technical data IRDH375(B)7.1 Dat
Page 63 and 64: Technical data IRDH375(B)General da
Page 65 and 66: Technical data IRDH375(B)7.3 Charac
Page 67 and 68:
Technical data IRDH375(B)Current ou
Page 69 and 70:
Technical data IRDH375(B)Current ou
Page 71 and 72:
Technical data IRDH375(B)Dimension
Page 73 and 74:
Technical data IRDH375(B)7.4.3 Coup
Page 75 and 76:
INDEXAAGH... 28Alarm LED 1 33Alarm
Page 77 and 78:
INDEX77 TGH1352en/11.2004
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A-ISOMETERÂ® IRDH375 IRDH375B - Bender

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