Pilot Channel Communications; Description - GE L90 Instruction Manual

Ur series line current differential system
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3 HARDWARE

3.3PILOT CHANNEL COMMUNICATIONS

A special inter-relay communications module is available for the L90. This module is plugged into slot "W" in horizontally
mounted units and slot "R" in vertically mounted units. Inter-relay channel communications is not the same as 10/100Base-
F interface communications (available as an option with the CPU module). Channel communication is used for sharing data
among relays.
The inter-relay communications modules are available with several interfaces as shown in the table below.
Table 3–3: CHANNEL COMMUNICATION OPTIONS
MODULE
SPECIFICATION
2A
C37.94SM, 1300 nm, single-mode, ELED, 1 channel single-mode
2B
C37.94SM, 1300 nm, single-mode, ELED, 2 channel single-mode
2E
Bi-phase, 1 channel
2F
Bi-phase, 2 channel
2G
IEEE C37.94, 820 nm, 128 kbps, multi-mode, LED, 1 channel
2H
IEEE C37.94, 820 nm, 128 kbps, multi-mode, LED, 2 channels
2S
Managed Ethernet switch with high voltage power supply
2T
Managed Ethernet switch with low voltage power supply
72
1550 nm, single-mode, laser, 1 channel
73
1550 nm, single-mode, laser, 2 channels
74
Channel 1 - RS422; channel 2 - 1550 nm, single-mode, laser
75
Channel 1 - G.703; channel 2 - 1550 nm, single-mode, laser
76
IEEE C37.94, 820 nm, 64 kbps, multi-mode, LED, 1 channel
77
IEEE C37.94, 820 nm, 64 kbps, multi-mode, LED, 2 channels
7A
820 nm, multi-mode, LED, 1 channel
7B
1300 nm, multi-mode, LED, 1 channel
7C
1300 nm, single-mode, ELED, 1 channel
7D
1300 nm, single-mode, laser, 1 channel
7E
Channel 1: G.703, Channel 2: 820 nm, multi-mode
7F
Channel 1: G.703, Channel 2: 1300 nm, multi-mode
7G
Channel 1: G.703, Channel 2: 1300 nm, single-mode ELED
7H
820 nm, multi-mode, LED, 2 channels
7I
1300 nm, multi-mode, LED, 2 channels
7J
1300 nm, single-mode, ELED, 2 channels
7K
1300 nm, single-mode, LASER, 2 channels
7L
Channel 1: RS422, channel: 820 nm, multi-mode, LED
7M
Channel 1: RS422, channel 2: 1300 nm, multi-mode, LED
7N
Channel 1: RS422, channel 2: 1300 nm, single-mode, ELED
7P
Channel 1: RS422, channel 2: 1300 nm, single-mode, laser
7Q
Channel 1: G.703, channel 2: 1300 nm, single-mode, laser
7R
G.703, 1 channel
7S
G.703, 2 channels
7T
RS422, 1 channel
7V
RS422, 2 channels, 2 clock inputs
7W
RS422, 2 channels
All of the fiber modules use ST type connectors. For two-terminal applications, each L90 relay requires at least one com-
munications channel.
GE Multilin
L90 Line Current Differential System
3.3 PILOT CHANNEL COMMUNICATIONS

3.3.1 DESCRIPTION

3
3-25

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