OfficeServ 7400 Installation Manual
© SAMSUNG Electronics Co., Ltd.
4-3
4.2 Connecting External Rectifiers
The external rectifier is an external power that supplies the power to IP phones or WBS24
connected when LIM-P board is used in the OfficeServ 7400 system. Since the internal
power source has the insufficient capacity, the additional power source to supply the power
to external equipment is required.
The procedure to connect an external rectifier is as follows:
1) Power off the OfficeServ 7400 System and an external rectifier.
2) There are three screws to connect the power cable to A and B parts(GND and -54 V)
in the back panel of the external rectifier.
Prepare a power cable like the figure below. The power cable consists of a red line and
a blue line and the ends of the lines are marked as GND(for red line), -48VDC(for
blue line). The other end of the power cable has the connector to connect to the socket
of the external rectifier for the OfficeServ 7400 system.
Figure 4.2 Power Cable
3) Loose screws and connect the power cable as shown the figure below.
Connect GND(red line) and -48 VDC(blue line) of the power cable to A part(GND)
and B part(-54 V), separately. At this time, any of three screws in each part is allowed
to be connected.
Figure 4.3 Connecting an External Rectifier
Button for exteranl battery
Socket for External
A
B
Red Line
Blue Line
OfficeServ
7400
External
Rectifier
