GESTRA NRS 1-40, Original Installation Manual

Page: 7 / 40

7
Explanatory Notes
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System components
NRG 1640
Level electrode NRG 1640, PN 40
NRG 1740
Level electrode NRG 1740, PN 63
NRG 1940
Level electrode NRG 1940, PN 160
NRG 11140
Level electrode NRG 11140, PN 320
Design
NRS 140
Enclosure made from insulating material with box terminals for installation in control cabinets.
The terminals are externally accessible.
Mounting on a standardised supporting rail TS 35 x 15 to DIN EN 50022.
External dimensions: 73 x 100 x 118
Function
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The automatic selftesting routine checks the switching controller every 3 seconds and the sensors
(e.g. the level electrodes) every 10 seconds. During each selftesting routine the error messages will
be stored in the switching controller. The error messages remain stored until the cause of the fault(s) is
eliminated. If a malfunction is detected the signal output of the switching controller (terminals 7
and 8) will be opened and closed as a function of the triggering pulse. As part of the automatic self
testing routine the function of the output relays will also be checked every 6 hours.