User's Manual

MDS 05-6399A01, Rev. D MDS Master Station 29
Table 4-2 DC Power Supply Modules
Module Input Power Current Rating
6843 +/- 12-36 Vdc 10 A Max.
6844 +/- 36-75 Vdc 3.5 A Max.
6845 +/- 75-140 Vdc 2 A Max.
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Figure 4-4 DC Power Connector
6 Connect a PC for Configuration (LAN or USB port). This prepares the Master Station for programming
of desired operating parameters. Configuration is further described in Section 5 Device Management
NOTE: If serial-based cabling is used for configuration, an adapter may be required at the PC, as
many PCs do not offer a serial port. In such cases, a USB-to-Serial adapter (with appropriate driver
software) may be used. These adapters are available from a number of manufacturers.
7 Radio, Alarm/Relay, and Duplexer Connections—The Alarm/Relay module provides two alarm
outputs, one for major and one for minor alarms. This module also provides TX/RX audio, PTT (TX
keying), and analog RSSI connections. See 6.5.2 Alarm/Audio Interface for pinout connections.
All other required connections on the front of the unit are cabled at the factory per ordered options.
8 Add connection of battery backup, as applicable.