Applications; Basic Mas Master Station Operation; Repeater And Polling Remote Operation - GE MDS 4790 Series Installation & Operation Manual

MDS 05-3438A01, Rev. F
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-8457-MDS-UP-9790X.aspx
a transceiver board causes the boards to communicate
briefly with each other to establish which board will operate as the
active board and which operates as the stand-by. For more information,
refer to "Transceiver Board and Power Supply Assemblies" on Page

2.3 Applications

The MDS 4790/9790 Series radios are designed for point-to-multipoint
data transmission in oil and gas pipeline communications, transactional
systems, and telecommunications systems. A MAS network provides
communications between a central host computer and remote terminal
units (RTUs) or other data collection devices. The operation of the radio
system is transparent to the computer equipment.

Basic MAS Master Station Operation

Figure 2 shows a typical point-to-multipoint system using an
MDS 4790/9790 Series master station. This is a basic system consisting
of a central master station and several associated remote units.
RTU
REMOTE RADIO
SWC OFF
RTU
REMOTE RADIO
SWC OFF
Figure 2. Typical MAS Network

Repeater and Polling Remote Operation

A MAS system using repeater and polling remote radios is shown in
Figure 3 on Page 4. Notice that the polling remote radio operates in
half-duplex mode and the repeater operates in full-duplex mode. Con-
figuring the radio for repeater operation is as simple as typing
with a PC connected to the rear panel diagnostic port. Refer to
ON
"DIAGNOSTICS AND CONTROL" on Page 30
MDS 4790/9790 Series I/O Guide
RTU
CONTINUOUSLY
KEYED
RTU
MDS MASTER
ST A TION
HOST SYSTEM
for details.
86.
REMOTE RADIO
SWC OFF
RTU
REMOTE RADIO
SWC OFF
REMOTE RADIO
SWC OFF
REPEATER
3