2-31
RI 45 PIII, Manual
C79000-G7076-C817-01
2.11.5 Relays Output
External units such as alarm indicators, horns and signal lights can be notified
about the system condition of the PC with the relay changeover contact.
In case of failure the error contact (De-energized position) is connected with the
mid-position contact.
A fault stop time of 500 ms is guaranteed so that the alarm analysis units
connected to the relay interface recognize the error condition. This is also true
when the executed PC Watchdog is reset.
The following table shows you the operating status and the corresponding switch
position.
Condition
switch posi-
tion
Normal operation
Working
condition
Watchdog executed
De-energized
position
Watchdog activated by software
De-energized
position
Watchdog acknowledged by software
working
position
Temperature error
De-energized
position
Power failure
De-energized
position
PC turned off
De-energized
position
Switching the relay from fail-state to error-free status via the software is
impossible if a fail-state occurs (that is temperature error or watchdog
executed).
The following table lists the technical specifications of the relays:
Switching voltage DC
max. 60 V
Switching current DC
max. 1 A
Switching capacity DC
max. 30 W
Limiting continuous current DC
max. 1 A
Switching ON/OFF
Conditions
Technical
Specifications of
the Relays
Motherboard
Summary of Contents for SIMATIC RI 45 PIII Series
Page 6: ...vi RI 45 PIII Manual C79000 G7076 C817 01 Contents ...
Page 90: ...2 62 RI 45 PIII Manual C79000 G7076 C817 01 Motherboard ...
Page 96: ...3 6 RI 45 PIII Manual C79000 G7076 C817 01 Bus Board Operator Panel Sound Module ...
Page 108: ...6 6 RI 45 PIII Manual C79000 G7076 C817 01 Connecting Cables ...
Page 126: ...7 18 RI 45 PIII Manual C79000 G7076 C817 01 SCSI Option ...
Page 130: ...Index 4 RI 45 PIII Manual C79000 G7076 C817 01 Index ...
