E3/DS3 to Fibre converter
7
5 E3/DS3 TO FIBRE CONVERTER
5.1 Rear panel
The E3/DS-3 line is connected via a pair of BNC connectors on the rear panel. The fibre
connection is via a Dual SC connector on the rear panel.
ALARM
EXT
MULTIMODE
LINE
Alarm
GRN
OK
Figure 5.1 MTU9230 rear panel
5.1.1 Power connector
AC mains power is supplied via an IEC connector. The units have an integral power supply
operating over the range 100-250 VAC. It draws less than 50mA of current when operating.
Alternative -48 VDC and -24VDC power supplies are available. See Section 1 of this manual
for further details of this option and consumption data.
The units must be connected to safety earth for correct operation. The MTU9230 power
supply should be connected to a supply socket that is physically located close to the unit and
is easily accessible.
5.1.2 External alarm relay
Both models offer an Alarm relay to provide an external warning of problems which may
arise. The interface is presented on an RJ45 connector, and offers both normally open and
normally closed contacts. Maximum contact rating is 1.5 Amp at 125 VDC. Normal is the
powered up, non-alarmed state. The connections are shown in the table below:
Figure 5.2 Alarm relay pinout
Pin
Contact
1
Normally closed
2
Normally open
3
Common
4
Not connected
5
Not connected
6
Not connected
7
Not connected
8
Not connected