Siemens Argus 7SR21 - E8 Case; Figure 4.2-1 E8 Standard Comms (USB Front Port, Rear RS485) (See Note 2); Figure 4.2-2 E8 Standard + Additional Comms (IRIG B, 2 X F.O. (ST Connectors))

7SR21 & 7SR22 Argus Installation Guide
©2010 Siemens Protection Devices Limited Chapter 5 Page 10 of 22
BC A
4.2 E8 Case
Figure 4.2-1 E8 Standard Comms (USB Front Port, Rear RS485) (See Note 2)
Figure 4.2-2 E8 Standard + Additional Comms (IRIG B, 2 x F.O. (ST Connectors))
Notes
1) Recommended terminations are pre-insulated & must be crimped using approved tooling.
2) RS485 (block ”B” terms 14, 16, 18, 20) connections to this communication facility is by screened, twisted pair
cable. On site when wiring other facilities ensure that these terminals are not obscured by other wiring runs. Cable
should be RS485 compliant.