ABB Industrial IT enabled REX 521 - Page 28

28
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Technical Reference Manual, General
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In the case of longer transmission distance, for example between MicroSCADA
system and a substation, the system configuration presented in the following figure
(Fig. 4.1.12.5.-2) is recommended.
O
I
SPAC 331 C
C
E
F
I
0
MicroSCADA
SPA-ZC22
SPA-ZC21
RER 103
REX 521 SPACOM REF 54_REX 521
REX52x
REX52x
Optical SPA-bus
COM-port (RS 232)
SPA-bus
COM-port (RS 232)
Protocol X