Bender A-Isometer IRDH 275, Operating Manual

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Technical data IRDH275(B)
60 TGH1361en/11.2009
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 k
Ω
...10 M
Ω
Relative percentage error (1 k
Ω
...10 M
Ω)
.................................................................................... ±1 k
Ω
Relative percentage error (10 k
Ω
...10 M
Ω) .....................................................................
±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 = 120 k
Ω
):....................................
Current output IRDH275 (load)................................................................................. 400 μA (
≤
12.5 k
Ω
)
Current output IRDH275B (load)................................................................................... 20 mA (
≤
500
Ω
)
Accuracy current output (1 k
Ω
...1 M
Ω
) ........................................................................ ±10%, ±1 k
Ω
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)
Switching components
Switching components ....................... 2 changeover contacts: K1 (Alarm 1), K2 (Alarm 2, device 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)