
isoRW425_D00052_06_Q_DEEN / 11.2023 9
ISOMETER® isoRW425
Technical data
()* = Factory settings
Insulation coordination acc. to IEC 60664-1/IEC 60664-3
Rated voltage.................................................................................440 V
Overvoltage category...........................................................................III
Supply voltage
Supply voltage Us.................................. AC 100…240 V/DC 24…240 V
Tolerance of Us................................................................. –30…+15 %
Frequency range Us...............................................................47…63 Hz
Power consumption.........................................................≤ 3 W, ≤ 9 VA
Monitored IT system
Nominal system voltage Un................... AC 100…240 V/DC 24…240 V
Nominal system voltage range Un(UL508).................. AC/DC 0…400 V
Tolerance of Un.............................................................................+15 %
Frequency range of Un..................................................DC, 15…460 Hz
Response values
Response value Ran1 ............................................... 2…990 kΩ (40 kΩ)*
Response value Ran2 ............................................... 1…980 kΩ (10 kΩ)*
Relative uncertainty Ran (R mode or ZF≈ RF)
............................................................................ ±15 %, at least ±1 kΩ
Hysteresis Ran............................................................ 25 %, at least 1 kΩ
Response value Zan1 ..................................................11…500 kΩ (off)*
Response value Zan2 ..................................................10…490 kΩ (off)*
Relative uncertainty Zan ...................................... ±15 %, at least ±1 kΩ
Hysteresis Zan ............................................................ 25 %, at least 1 kΩ
Undervoltage detection U<........................................ 10…499 V (off)*
Overvoltage detection U>.......................................... 11…500 V (off)*
Relative uncertainty U............................................. ±5 %, at least ±5 V
Relative uncertainty depending on the frequency ≥ 400 Hz ..................
...........................................................................................–0.015 %/Hz
Hysteresis U............................................................5 %, mindestens 5 V
Time response
Response time tan at RF= 0.5 x Ran and Ce=1 μF acc. to IEC 61557-8......
......................................................................................................≤ 10 s
Response time tan at ZF= 0.5 x Zan..................................................≤ 5 s
Start-up delay t................................................................0…10 s (0 s)*
Response delay ton ...........................................................0…99 s (0 s)*
Delay on release toff..........................................................0…99 s (0 s)*
Interface
Interface/protocol............................RS-485/BMS, Modbus RTU, isoData
Baud rate............................ BMS (9.6 kbit/s), Modbus RTU (selectable),
..............................................................................isoData (115.2 kbit/s)
Cable length (9.6 kbit/s)........................................................ ≤ 1 200 m
Cable (shield connected to PE on one side):
recommended:............................................. CAT6/CAT7 min. WG23
twisted pairs: ...................................................min. J-Y(St)Y 2 x 0.8
Terminating resistor............ 120 Ω (0.25 W), internal, can be connected
Device address, BMS bus, Modbus RTU.................................3…90 (3)*
Technische Daten
()* = Werkseinstellung
Isolationskoordination nach IEC 60664-1/IEC 60664-3
Bemessungsspannung...................................................................440 V
Überspannungskategorie.....................................................................III
Versorgungsspannung
Versorgungsspannung Us...................... AC 100…240 V/DC 24…240 V
Toleranz von Us................................................................ –30…+15 %
Frequenzbereich Us...............................................................47…63 Hz
Eigenverbrauch................................................................≤ 3 W, ≤ 9 VA
Überwachtes IT-System
Netznennspannung Un.......................... AC 100…240 V/DC 24…240 V
Netznennspannungsbereich Un(UL508)...................... AC/DC 0…400 V
Toleranz von Un............................................................................+15 %
Frequenzbereich von Un................................................DC, 15…460 Hz
Ansprechwerte
Ansprechwert Ran1 ................................................. 2…990 kΩ (40 kΩ)*
Ansprechwert Ran2 ................................................. 1…980 kΩ (10 kΩ)*
Ansprechunsicherheit Ran (R-Mode oder ZF≈ RF)
......................................................................±15 %, mindestens ±1 kΩ
Hysterese Ran ......................................................25 %, mindestens 1 kΩ
Ansprechwert Zan1..................................................... 11…500 kΩ (off)*
Ansprechwert Zan2..................................................... 10…490 kΩ (off)*
Ansprechunsicherheit Zan..............................±15 %, mindestens ±1 kΩ
Hysterese Zan.......................................................25 %, mindestens 1 kΩ
Unterspannungserkennung U<.................................. 10…499 V (off)*
Überspannungserkennung U>................................... 11…500 V (off)*
Ansprechunsicherheit U....................................±5 %, mindestens ±5 V
Frequenzabhängige Ansprechunsicherheit ≥ 400 Hz
...........................................................................................–0,015 %/Hz
Hysterese U.............................................................5 %, mindestens 5 V
Zeitverhalten
Ansprechzeit tan bei RF= 0,5 x Ran und Ce=1 μF nach IEC 61557-8..........
......................................................................................................≤ 10 s
Ansprechzeit tan bei ZF= 0,5 x Zan...................................................≤ 5 s
Anlaufverzögerung t........................................................0…10 s (0 s)*
Ansprechverzögerung ton.................................................0…99 s (0 s)*
Rückfallverzögerung toff...................................................0…99 s (0 s)*
Schnittstelle
Schnittstelle/Protokoll.....................RS-485/BMS, Modbus RTU, isoData
Baudrate.............................BMS (9,6 kbit/s), Modbus RTU (einstellbar),
..............................................................................isoData (115,2 kbit/s)
Leitungslänge (9,6 kbit/s)...................................................... ≤ 1 200 m
Leitung (Schirm einseitig an PE)
empfohlen: ..................................................... CAT6/7 min. AWG23
alternativ paarweise verdrillt:..........................min. J-Y(St)Y 2 x 0,8
Abschlusswiderstand.......................120 Ω (0,25 W), intern, zuschaltbar
Geräteadresse, BMS-Bus, Modbus RTU .................................3…90 (3)*