INTRODUCING THE FM4900
11
76-02-011F
4. 4 Remote Management port
If you have chosen the LM1100 SNMP Enabler option this port will contain an RJ45
connector, otherwise it will contain a blanking plug.
This port is labelled
MAN PORT
on the rear panel. The LM1100 SNMP Enabler option gives
access to the SNMP network management system via an IEEE 802.3/10BaseT interface on
the rear of the DSU. The layout of this port’s RJ45 connector is shown below:
Note:
The Management port is regarded as a SELV port within the scope of EN 41003.
Figure 4. 5 Management port layout
4. 5 Alarm Extension
This port contains either a 6-pin mini-DIN connector or a 9-pin D-type connector, allowing
you to connect the major and minor alarm relay contacts within the FM4900 to a remote
indicator, such as a bell or a lamp. The two types of connectors are described below. The
Major alarm contacts are normally open, so that major alarm indication is given if the mains
power supply to the DSU should fail. The Alarm Relay port is regarded as a SELV port within
the scope of EN41003.
Figure 4.5 6-pin connector layout
Pin
Signal
1
Tx Data + ve
2
Tx Data - ve
3
Rx Data + ve
4
Not connected
5
Not connected
6
Rx Data - ve
7
Not connected
8
Not connected
Pin
Function
1
Major common
2
Minor N/C
3
Major N/O
4
Minor N/O
5
Major N/C
6
Minor common
Summary of Contents for FM4900
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