4
Applications
Substation and
remote control
systems
Figure 1. Basic system configuration.
Host computer
S.P.I.D.E.R MicroSCADA
or SCS 100
SPACOM relays, SACO annunciators
SRIO 500M
ANSI X3.28 protocol
Display
terminal
RS 232 C
SPACOM relays, SACO annunciators
Optical bus
connection
module
SPA-ZC 22
Optical
SPA bus
2
4
SPA bus
RS 485
1