ABB 500NMD20 User Manual

Connections Device description
WARNING
The relay is designed for switching only safe low voltages.
4.7.7 Extension interface (EXT)
The plug of the proprietary expansion bus is designed as USB type B but uses a manufacturer
specific protocol.
The configuration parameters are stored directly on the device. In addition, a configuration
stick can be connected to the expansion bus to save data externally, in example to exchange
defective devices easily.
ADVICE
Danger of damaging the device.
Do not connect any USB devices!
4.8 Display elements
LED Description Function
off Device is without power supplyPower Voltage Supply
green Power supply switched on
off Hardware fault or bootingReady Ready
green Device ready
off DSL unit in slave modeDSL Master (not
500NMD20)
DSL Master
green DSL unit in master mode
off No active DSL linkDSL Link (not
500NMD20)
DSL link
green DSL link established
off No activity on the DSL interfaceDSL Activity (not
500NMD20)
DSL Activity
green Data is transmitted via DSL
off SFP not pluggedFo Module
(500NMD11and
500NMD20)
SFP Module
green SFP plugged
off no optical link activeFo Link
(500NMD11and
500NMD20)
SFP link
green Optical link established
off No activity on the optical inter-
face
Fo Activity
(500NMD11and
500NMD20)
SFP activity
green Data is transmitted via the opti-
cal interface
off DCD inactive on Con interfaceCon DCD Con DCD
green DCD active
off No activity on the Con interfaceCon Activity Con activity
green Data is transmitted via Con
off No alarm
flash Warning or configuration error
Alarm Alarm
red alarm
36 1KGT150966 V0001

ABB 500NMD20 Specifications

General

Brand	ABB
Model	500NMD20
Category	Network Router
Language	English