GE D90 Plus Instruction Manual page 64

WIRING
DANGER:
Direct input and output link LEDs
54
Figure 29: Direct input and output dual channel connection
The interconnection requirements are described in further detail in this section for each
inter-relay communication module, which is specified at the time of ordering. The table
lists these modules. All fiber modules use ST type connectors.
Table 3: Inter-relay communication modules
Order code Specification
option
B G.703, 64/128 kbps, two channels
C RS422, 64/128 kbps, two channels, two clock inputs
D 850 nm, 64/128 kbps, ST multimode laser, two channels with DDMI
The 850 nm module uses a class 1 VCSEL laser that is harmful to the eye. Observing any
fiber transmitter output can cause serious injury to the eye.
The link LEDs for channels 1 and 2 are located on the rear of the inter-relay
communications card, which is located in slot B.
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INSTALLATION