User`s guide

Introducing the BM85 Bridge/Multiplexers
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1.7 Specifications (DC/DC Power Models)
1.7.1 Bridge/Multiplexer Models for DC/DC Power
Description Name BM85 Modbus Plus
Bridge/Multiplexer
Part Number NW–BM85D002, NW–BM85D008
Mounting Method Vertical Standard 19 in Rack
Physical
Characteristics
Height 3.47 in (88 mm)
Width 19.00 in (483 mm), mounting panel
18.26 in (464 mm), hole centers
Depth 9.15 in (232 mm)
Weight 5.5 lbs (2.5 kg) net
6.5 lbs (3.0 kg) shipping
Power Requirements 105 to 140 Vdc, or 24 Vdc +15%
Access Rear panel screw terminals
Input Current 0.41 A at 125 V dc
Inrush Current 6 A typical at 125 V dc
Ground Leakage 1 mA at 140 V dc
Fuse External, customer supplied
Environmental Temperature 0 ... 60 degrees C, operating
–40 ... +80 degrees C, storage
Humidity 0 ... 95%, non–condensing
Altitude 10,000 ft (3 km), maximum
EMI, Radiated
Susceptibility
27 ... 500 mHz, 10 V/m
IEC 801–3, level 3
IEEE/ANSI C37.90.2, 1987
Surge Withstand,
Fast Transient
± 2 kV (1 kV on I/O), V3300
generator into 50 ohms.
Corresponds to ± 4 kV (2 kV on I/O)
into open circuit.
IEC 801–4, level 3
IEEE/ANSI C37.90.1 2.3, 1989
Surge Transients 2 kV
IEC 801–5, level 3
Electrostatic Discharge 8 kV, ten discharges
IEC 801–2, level 3
Surge Withstand,
Oscillatory Wave
2.5 kV
IEEE 472
IEEE/ANSI C37.90.1 2.2, 1989