Fiber: Led And Eled Transmitters; Fiber-Laser Transmitters - GE UR Series L90 Instruction Manual

3 HARDWARE
The current differential function must be "Enabled" for the communications module to properly operate. Refer to

SETTINGS GROUPED ELEMENTS
NOTE
The fiber optic modules (7A to 7W) are designed for back-to-back connections of UR-series relays only. For con-
nections to higher-order systems, use the 72 to 77 modules or the 2A and 2B modules.
NOTE
Observing any fiber transmitter output can injure the eye.
The following figure shows the configuration for the 7A, 7B, 7C, 7H, 7I, and 7J fiber-only modules.
The following figure shows the configuration for the 72, 73, 7D, and 7K fiber-laser module.
When using a laser Interface, attenuators can be necessary to ensure that you do not exceed the
maximum optical input power to the receiver.
GE Multilin
 
LINE DIFFERENTIAL
Figure 3–27: LED AND ELED FIBER MODULES
Figure 3–28: LASER FIBER MODULES
L90 Line Current Differential System
3.3 PILOT CHANNEL COMMUNICATIONS
menu.
CURRENT DIFFERENTIAL

3.3.2 FIBER: LED AND ELED TRANSMITTERS

3.3.3 FIBER-LASER TRANSMITTERS

3
3-27