Technical data IRDH275(B)
74
IRDH275_D00122_02_M_XXEN/10.2016
Measuring circuit
Measuring voltage U
m
........................................................................................................................................ ≤ 50 V
Measuring current I
m
max. (at R
F
= 0 Ω)...................................................................................................... ≤ 280 μA
Internal DC resistance R
i
.................................................................................................................................. ≥ 180 kΩ
Internal impedance Z
i
at50 Hz......................................................................................................................... ≥ 180 kΩ
Permissible extraneous DC voltage U
fg
.................................................................................................... ≤ DC 1200 V
Permissible system leakage capacitance C
e
................................................................................................... ≤500 μF
Factory setting....................................................................................................................................................... 150 μF
Displays
Display, illuminated.............................................................................................................................. two-line display
Characters (number of characters)........................................................................................................................2 x 16
Display range, measuring value ............................................................................................................. 1 kΩ…10 MΩ
Operating uncertainty (20 kΩ…1 MΩ) (acc. to IEC 61557-8:2007-01) .................................................... ±15 % **
Operating uncertainty (1 kΩ…20 kΩ).......................................................................................... ±1 kΩ
/
±15 % **
Operating uncertainty (1 MΩ…10 MΩ).................................................................................. ±0,1 MΩ / ±15 % **
** = under test conditions according to IEC 61326-2-4, the tolerances may double
Outputs/inputs
TEST/ RESET button..............................................................................................................................internal /external
Cable length TEST/RESET button external ......................................................................................................... ≤ 10 m
Current output for measuring instrument SKMP (scale centre point = 120 kΩ):..........................................................
Current output IRDH275 (load) ...................................................................................................... 400 μA (≤ 12.5 kΩ)
Current output IRDH275B (load).........................................................................................................20 mA (≤ 500 Ω)
Accuracy current output (1 kΩ…1 MΩ)
in relation to the displayed measured value........................................................................................ ±10 %, ±1 kΩ
Serial interface
Interface / Protocol IRDH275.......................................................................................................RS485 / ASCII-IsoData
Interface / Protocol IRDH275B....................................................................................................................RS485 / BMS
Connection ................................................................................................................................................ terminals A/B
Cable length ................................................................................................................................................... ≤ 1200 m
Shielded cable (shield on one site to PE)................................................. two-core, ≥ 0.6 mm
2
, e.g. J-Y(St)Y 2 x 0.6
Terminating resistor..................................................................................................................................120 Ω (0.5 W)
Device address, BMS bus .................................................................................................. 1…30 (factory setting = 3)
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