Flowserve NRS 1-40 - Manual (Page 14)

14
System Malfunctions
Faulty installation and/or configuration of CAN bus components, excessive
temperatures in the devices, defective electronic component parts or electromagnetic
interferences of the supply system can result in system malfunctions.
There are four system malfunctions that might occur in the level electrode and the
switching controller.
■ Max. admissible temperature in electrode terminal box exceeded
■ No or faulty communication between controller and electrode
■ Fault in CAN bus
■ Failure of 24 V power supply unit built in switching controller NRS 1-40
The malfunction information is updated with every self-test (switching controller:
every 3 sec., level electrodes: every 10 sec.). If no faults have ocurred the malfunction
information will be deleted automatically. If faults persist the malfunction information
remains stored.
As part of the automatic self-testing routine of the switching controller, the switching-
off of the output relays every 6 hrs is checked, too. If a fault is detected the signal
output (terminals 7 and 8) will be opened and closed as a function of time.
The terminal strip of the NRS 1-40 is live during operation.
This presents the danger of electric shock.
Cut off power supply before fixing or removing the equipment.
Danger
Alarm
– continued –
Note
■ The switching controller does not have its own lock-out circuit.
Lock-out and manual reset facilities are to be provided externally.
■ The signal output (terminal 7, 8) is instantaneously energized
(no delay of response) in the event of an alarm.