Primary Power; Ac-Powered Units; Dc-Powered Units - GE MDS 4790M Installation And Operation Manual

CAUTION
POSSIBLE
EQUIPMENT
DAMAGE
MDS 05-3628A01, Rev. B
Figure 8. Front Panel Removal
2. Release the modular connector and cable from the back of the panel.
3. Plug the connector into an in-line splice connector (GE MDS P/N
73-1155A09).
4. Snap the splice connector into the front of the chassis at the square cut-out.
5. Snap the front panel onto the Auxiliary Mounting Plate in the same way it
was attached to the main radio chassis.
6. Mount the Auxiliary Mounting Plate to the rack cabinet just above (or
below) the radio chassis.
7. Attach the extension cable (GE MDS P/N 03-2198A04) between the front
panel modular connector and the in-line splice connector on the radio
chassis.

4.3 Primary Power

Before connecting primary power to the radio, verify that the power source
matches the power supply operating range and type of service (AC or DC).
Improper voltages may damage the equipment. The radio has either a nominal
24 Vdc, 48 Vdc, a 110/220 Vac power supply module, or 125 Vac to 12 Vdc
with external converter (see "Technical Specifications" on page 72 for voltage
ranges). The input voltage is marked on the module at the rear of the radio.

AC-Powered Units

AC-powered radios are designed to operate from 90 to 267 V ac (50-60 Hz)
primary power. No special configuration is required to operate the radio
anywhere within the input voltage range. An ac power cord is supplied with
these units. If the radio is equipped with the 110–240 V ac power supply
option, the unit can be powered from a dc source between 120 V dc to 370 V
dc as well.

DC-Powered Units

Figure 9 shows a rear view of the dc power supply. Connection to the dc power
supply is made with a three-conductor plug-in terminal strip. The radio can be
operated in either a positive or negative ground configuration. The centre pin
of the connector is not connected in the radio.
MDS 4790M (MPT 1411) I/O Guide
Invisible place holder
13