ABB RELION 670 Series Technical Manual page 1331

1MRK 502 066-UUS B
Line data communication module LDCM
Each module has one optical port, one for each remote end to which the IED communicates.
Alternative cards for Long range (1550 nm single mode), Medium range (1310 nm single mode) and
Short range (850 nm multi mode) are available.
22.2.15.2 Design
The LDCM is a PCMIP type II single width format module. The LDCM can be mounted on:
• the ADM
• the NUM
IEC07000087 V2 EN-US
Figure 663: The SR-LDCM layout. PCMIP type II single width format with two PCI connectors
IEC06000393 V2 EN-US
Figure 664: The MR-LDCM and LR-LDCM layout. PCMIP type II single width format with two
Technical manual
Class 1 laser product. Take adequate measures to protect the eyes. Never look into
the laser beam.
ST
ST
and one I/O ST type connector
PCI connectors and one I/O FC/PC type connector
IEC07000087=1=en=Original.vsd
IEC06000393=1=en=Original.vsd
Section 22
IED hardware
M16075-3 v4
SEMOD55466-4 v2
1325