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ISOMETER® IRDH275BM-7
Messkreis
Messspannung U
..................................................................≤ 50 V
m
Messstrom I
(bei R
= 0 Ω) ................................................. ≤ 21 μA
m
F
Innenwiderstand DC R
.......................................................≥ 2,4 MΩ
i
Impedanz Z
bei 50 Hz ....................................................... ≥ 2,4 MΩ
i
Zulässige Fremdgleichspannung U
Zulässige Netzableitkapazität C
Werksseitige Einstellung ............................................................. 2 μF
Anzeigen
Anzeige, beleuchtet. ........................................... zweizeiliges Display
Zeichen (Anzahl) ....................................................................... 2 x 16
Anzeigebereich Messwert .......................................... 50 kΩ...10 MΩ
Betriebsmessabweichung 50...500 kΩ ................................ ± 50 kΩ
Betriebsmessabweichung 500 kΩ...10 MΩ ............................±10 %
Ausgänge/Eingänge
Test-/Reset-Taste ..........................................................intern/extern
Leitungslänge Test-/Reset-Taste extern .................................≤ 10 m
Stromausgang für Messinstrument SKMP
(Skalenmittelpunkt = 1,2 MΩ):
Stromausgang (Bürde).............................................20 mA (≤ 500 Ω)
Genauigkeit Stromausgang (100 kΩ...10 MΩ) .....±10 %, ± 100 kΩ
Serielle Schnittstelle
Schnittstelle/Protokoll IRDH275B ...................................RS-485/BMS
Anschluss ......................................................................Klemmen A/B
Leitungslänge .................................................................... ≤ 1200 m
Empfohlene Leitung (geschirmt, Schirm einseitig an PE) ..................
....................................................................................J-Y(St)Y 2 x 0,6
Abschlusswiderstand. ...................................................120 Ω (0,5 W)
Geräteadresse, BMS-Bus . ..................1...30 (Werkseinstellung = 3)
Schaltglieder
Schaltglieder ..2 Wechsler: K1 (Alarm 1), K2 (Alarm 2, Systemfehler)
Arbeitsweise K1, K2 (Alarm 1 / Alarm 2) ............................................
..................................................... Arbeits- oder Ruhestromschaltung
Werksseitige Einstellung (Alarm 1 / Alarm 2) .Arbeitsstromschaltung
Elektrische Lebensdauer ..................................... 12 000 Schaltspiele
Kontaktklasse ........................................................ IIB (IEC 60255-23)
Kontaktbemessungsspannung .............................. AC 250 V/DC 300 V
Einschaltvermögen .............................................................AC/DC 5 A
Ausschaltvermögen ................................2 A, AC 230 V, cos phi = 0,4
.............................................................. 0,2 A, DC 220 V, L/R = 0,04 s
Kontaktstrom bei DC 24 V ........................................≥ 2 mA (50 mW)
8
IRDH275BM-7_D00123_01_Q_DEEN/ 03.2021
.................. über AGH675S-7...
fg
. ........................................... ≤ 5 μF
e
Measuring circuit
Measuring voltage U
............................................................≤ 50 V
m
Measuring current I
(at R
m
F
Internal DC resistance R
.....................................................≥ 2.4 MΩ
i
Internal impedance Z
, at 50 Hz ...........................................≥ 2.4 MΩ
i
Permissible extraneous DC voltage U
Permissible system leakage capacitance C
Factory setting ............................................................................ 2 μF
Displays
Display, illuminated ................................................. two-line display
Characters (number of characters) ............................................ 2 x 16
Display range, measuring value ................................ 50 kΩ...10 MΩ
Relative percentage error 50...500 kΩ ..................................±50 kΩ
Relative percentage error 500 kΩ...10 MΩ ............................±10 %
Outputs/inputs
TEST/RESET button . .................................................internal/external
Cable length TEST/RESET button external ...............................≤ 10 m
Current output for measuring instrument SKMP
(scale centre point = 1.2 MΩ):
Current output (load) ...............................................20 mA (≤ 500 Ω)
Accuracy current output (100 kΩ...10 MΩ).............±10 %, ±100 kΩ
Serial interface
Interface/Protocol IRDH275B ..........................................RS-485/BMS
Connection ................................................................... terminals A/B
Cable length.......................................................................≤ 1,200 m
Recommended cable (screened, screen on one side connected to PE)
...............................................................................J-Y(St)Y 2 x 0.6
Terminating resistor......................................................120 Ω (0.5 W)
Device address, BMS bus ....................... 1...30 (factory setting = 3)
Switching components
Switching components .......2 changeover contacts: K1 (Alarm 1), K2
....................................................................... (Alarm 2, system fault)
Operating principle K1, K2 (Alarm 1, Alarm 2) ...N/O or N/C operation
Factory setting (Alarm 1/Alarm 2) ............................... N/O operation
Electrical endurance ...............................12,000 switching operations
Contact class. ......................................................... IIB (IEC 60255-23)
Rated contact voltage .......................................... AC 250 V/DC 300 V
Making capacity ..................................................................AC/DC 5 A
Breaking capacity. ...................................2 A, AC 230 V, cos phi = 0.4
.............................................................. 0.2 A, DC 220 V, L/R = 0.04 s
Minimum contact current at DC 24 V .......................≥ 2 mA (50 mW)
= 0 Ω) ....................................... ≤ 21 μA
.............. with AGH675S-7...
fg
............................ ≤ 5 μF
e
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