L90 Channel Communication; Description - GE L90 Instruction Manual

3 HARDWARE

3.3L90 CHANNEL COMMUNICATION

The L90 relay requires a special communications module which is plugged into slot "W" for horizontal-mounting units or slot
"R" for vertical-mounting units. This module is available in several varieties. Relay-to-relay channel communication is not
the same as the 10Base-F interface (available as an option with the CPU module). Channel communication is used for
sharing data among relays.
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
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
7W RS422, 2 channels
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, multi-mode, LED, 1 channel
77 IEEE C37.94, 820 nm, multi-mode, LED, 2 channels
The above table shows the various channel communication interfaces available for the L90 relay. All of the fiber modules
use ST type connectors. For two-terminal applications, each L90 relay requires at least one communications channel.
The current differential function must be "Enabled" for the communications module to work. Refer to
!"
TINGS GROUPED ELEMENTS
NOTE
The fiber optic modules (7A to 7W) are designed for back-to-back connections of L90 relays only. For con-
nections to higher-order systems, use the 72 to 77 modules or the 2A/2B modules.
NOTE
OBSERVING ANY FIBER TRANSMITTER OUTPUT MAY CAUSE INJURY TO THE EYE.
CAUTION
GE Multilin
! !
LINE DIFFERENTIAL CURRENT DIFFERENTIAL
L90 Line Differential Relay
3.3 L90 CHANNEL COMMUNICATION

3.3.1 DESCRIPTION

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