Fiber: Led And Eled Transmitters; Fiber-Laser Transmitters - GE L30 Instruction Manual

3.3 PILOT CHANNEL COMMUNICATIONS
The current differential function must be "Enabled" for the communications module to properly operate.
Refer to
SETTINGS
NOTE
The fiber optic modules (7A to 7W) are designed for back-to-back connections of UR-series relays only. For
connections to higher-order systems, use the 72 to 77 modules or the 2A and 2B modules.
NOTE
OBSERVING ANY FIBER TRANSMITTER OUTPUT MAY CAUSE INJURY TO THE EYE.
CAUTION
The following figure shows the configuration for the 7A, 7B, 7C, 7H, 7I, and 7J fiber-only modules.
3
The following figure shows the configuration for the 72, 73, 7D, and 7K fiber-laser module.
When using a laser Interface, attenuators may be necessary to ensure that you do not exceed the maxi-
mum optical input power to the receiver.
WARNING
3-28
GROUPED ELEMENTS LINE DIFFERENTIAL
Module: 7A / 7B / 7C
Connection Location: Slot X
RX1
TX1
1 Channel
Figure 3–28: LED AND ELED FIBER MODULES
Module: 72/ 7D
Connection Location: Slot X
TX1
RX1
1 Channel
Figure 3–29: LASER FIBER MODULES
L30 Line Current Differential System
CURRENT DIFFERENTIAL

3.3.2 FIBER: LED AND ELED TRANSMITTERS

7H / 7I / 7J
Slot X
RX1
TX1
RX2
TX2
831719A2.CDR
2 Channels

3.3.3 FIBER-LASER TRANSMITTERS

73/ 7K
Slot X
TX1
RX1
TX2
RX2
831720A3.CDR
2 Channels
3 HARDWARE
menu.
GE Multilin