ABB RELION 670 Series Installation Manual page 72

Section 6
Connecting
IEC07000196 V1 EN-US
Figure 44: Overview of the X.21 LDCM module
3
IEC07000239 V1 EN-US
Figure 45: The X.21 LDCM module external connectors
1. Earth selection connector for IO, screw terminals, 2-pole
2. Earth pin
3. Soft earth pin, see figure
4. X.21 Micro D-sub 15 pole male connector according to the V11 (X:27) balanced version
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Installation manual