Siemens siprotec SJ62 User Manual page 628

SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Figure A-90 Half-duplex operation with two RTD-Boxes, above: optical design (2 FOs);
below: design with RS 485
Alternatively to the above figures, when 7SJ64 uses a converter it must be
connected to Port D otherwise Port C or D can be used.
A.3 Connection Examples
626