ABB REO 517 Applications Manual page 430

Multi-function terminals for railway application
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420
Input/Output modules
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
)LJXUH  %ORFN GLDJUDP RI WKH ELQDU\ RXWSXW PRGXOH
Two single output relay contacts can be connected in series (which gives a command
output) in order to get a high security at operation of high voltage apparatuses.
Micro-
controller
Memory
99000505.vsd
&KDSWHU 
+DUGZDUH PRGXOHV

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