Connection Diagram, External Led Indicator; Operation Modes; Fig. 8: Connection Diagram, External Led - Siemens PCA2005-A1 Technical Manual

5 Product data

Operation modes

5.2.2 Connection diagram, external LED indicator

5.3 Operation modes
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It is not permitted to cross over between different loop connections. Wiring must
run from the 'Start' loop connection to the 'End' loop connection of the very same
loop.
An external LED can be mounted to display the status of the loop isolator.
●
The external LED replaces the internal LED as the status display.
●
The external LED must be configured using the SIL switch.

Fig. 8: Connection diagram, external LED

See also
 Adjustment elements [➙ 31]
Mode Description
Normal Loop isolator is in regular operation Pilot tone 20kHz
Alarm An alarm message is playing
Maintenance Could be activated via 'PACE-
Design': Supervision, General
Flags, 'EN Maintenance' active
Inspection LED flashes after 90 s pilot tone
Module fault Pilot tone at least 60 s off or pilot
reset tone constant for 30 s on
Pilot tone
Interval adjustable in
'PACE-Design'
configuration
Pilot tone constant 21 kHz
Pilot tone 20 kHz
Interval fixed On: 5 s, Off:
2 s
Pilot tone constant 20 kHz
< 90 s
Pilot tone 20 kHz
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