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Siemens 7SR23 DAD Manual page 144

High impedance protection relay

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Figure 4.1-3 E6 Standard + Additional Ports (IRIG-B, RS485)
Figure 4.1-4 E6 Standard + Additional Ports (IRIG-B, RS232)
Notes
1) Recommended terminations are pre-insulated & must be crimped using approved tooling.
2) RS485 (block "B" terminals 14, 16, 18, 20 and optional COMMS MODULE) connections are by screened,
twisted pair cable.
Ensure that these terminals are not obscured by other wiring runs.
Cable should be RS485 compliant.
©2013 Siemens Protection Devices Limited
Chapter 5) 7SR23 DAD Installation Guide
Chapter 5 Page 12 of 24

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