Figure 9-1 - Example Of Local Network - GE Hydran 201 i Instruction Manual

Chapter 9 • Communications and Networking
• The H201Ci's manage all communications automatically (transmission and reception).
Data transmission is half-duplex (one direction at a time, from a single talker).
• Ideally, the H201Ci's should be located in a limited zone of an electrical substation, for
example the control room.
H201Ti
Phase B
H201Ti
Phase A
H201Ti
Supervisory Link, isolated, 2 pairs;
max. (all cables added up): 1,200 m (4,000 ft)
Host computer
DB-9
The RS-485 local network link cable can be connected at the following locations:
• In the H201Ci-C: To the terminals 21 to 24 of the Main Terminal Block (item 5 in
Figure 3-2 on page 3-3).
9-4
Supervisory link,
isolated, 3 pairs;
max.: 1,200 m (4,000 ft)
Auxiliary
H201Ti
Phase C
H201Ti
Telephone
line
to remote
Modem
host computer
(option)

Figure 9-1 - Example of Local Network

Rev. 6, March 2011
To other H201C
Controller
H201C -1 i
Daisy chain network
isolated, 1 triad
Max. (all cables
1,200 m (4,000 ft)
H201C -C i
Max. of H201C 's: 32
To other
H201C
Controller
Host
computer
RS-232 link
Max.: 7.5 m (25 ft)
i
RS-485 link,
added up):
i
i
Part 17997