ABB Relion 670 Series Communication Protocol Manual page 33

1MRK 511 395-UEN E
IEC16000079 V1 EN-US
Figure 6:
There are two types of IO connectors: snap-in connectors for plastic fiber cables and ST/
bayonet connectors for glass fiber cables. The SLM can be equipped with either type of
connector or a combination of both connectors. This is identified by a tag.
Connect the incoming optical fiber to the RX receiver input, and the outgoing optical fiber to
the TX transmitter output. Pay special attention to the instructions concerning handling and
connection of fiber cables.
LON, 670 series
Communication protocol manual
IEC16000079-1-en.vsd
Rear view of 1/2 x 19" casing with 1 TRM slot
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Section 3
LON operation principle
27