Table of Contents
Advertisement
Input/Output modules
1
5
5
2
3
xx00000299.vsd
)LJXUH 2QH RI WZHOYH ELQDU\ RXWSXW JURXSV
The output relays are provided with a supervision function to ensure a high degree of
security against unwanted operation. The status of the output circuits is continuously
read back and compared with the expected status. If any discrepancy occurs, an error is
reported. This function covers:
•
interrupt or short circuit in an output relay coil
•
failure of an output relay driver.
%LQDU\ ,2 PRGXOH ,20
The binary in/out module contains eight optically isolated binary inputs and twelve bi-
nary output contacts. Ten of the output relays have contacts with a high-switching ca-
pacity (trip and signal relays). The remaining two relays are of reed type and for
signalling purpose only. The relays are grouped together as can be seen in the terminal
diagram.
&KDSWHU
+DUGZDUH PRGXOHV
421
Advertisement
Table of Contents
