DMD2401 LB/ST L-Band Satellite Modem and ODU Driver
Electrical Interfaces
TM075 - Rev. 1.3
5-1
Section 5 – Electrical Interfaces
5.0 DMD2401 LB/ST Connections
All modem connections are made to the labeled connectors located on the rear of the unit. The
connector definitions and pinout tables are shown below, and are those on the modem unit. Any
connection interfacing to the modem must be the appropriate mating connector.
Note: Shielded cables with the shield terminated to conductive backshells are required in
order to meet EMC directives. Cables with insulation flammability ratings of 94 VO or
better are required for Low Voltage Directives.
5.1 AC Power Input/Switch
The AC Power Entry Module is located at the left side of the modem (as viewed from the rear).
Primary power applied to the port with the supplied power cable is 100 – 240 VAC, 50 – 60 Hz.
Integrated into the power entry module is the Power On/Off Rocker Switch. Power consumption
for the unit is 1A. The power cord/connector assembly is a supplied item.
A chassis ground connection (size 10-32 thread) stud, is located to the lower left of the AC Power
Cord.
5.2 DC Power Input/Switch
The Optional DC Power Input and Switch (Figure 5-1) is available for all DMD2401 LB/ST
products. The unit may be powered from a 36 – 72 VDC source with a maximum unit power
consumption of 2A. Refer to Table 5-1 for pinouts.
Table 5-1. DC Power
A
–
B
+
C
Ground
5.2 DMD2401 LB/ST with RS-422 Data Interface
The DMD2401 LB/ST Satellite Modem w/ RS-422 Data Interface is shown in Figure 5-1.
5.2.1 RX DC POWER (J1)
The Receive DC Power Port (J1) is the 950 – 1750 MHz Demodulator IF Input. It may be a Mini
UHF (shown) or SMA Connector depending upon customer request.
5.2.2 TX DC POWER (J2)
The Transmit DC Power Port (J2) is the 950 – 1750 MHz Modulator IF Output. It may be a Mini
UHF (shown) or SMA Connector depending upon customer request.
