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NRR 2-60 - Installation & Operating Manual -
819693-00
Bringing into service – start, operation and alarm
Fig. 11
Feed control or discharge control is active.
Startup
During startup, all the relays of the NRR 2-60 3-point stepping regulator are de-energised and the LED
lights up orange.
Normal operation
During normal operation, when the supply voltage is on and the measured level is within the MIN and
MAX switchpoints, the MIN and MAX relays of the controller are energised. The LED lights up green.
Alarm
If the fill level is below the set MIN limit or above the set MAX limit, the appropriate relay (MIN/MAX) of
the controller is de-energised and indicates that the MIN/MAX level has been reached. The LED lights up
green.
The output relays (CLOSED/OPEN) of the NRR 2-60 3-point stepping regulator that actuate the valve are
energised or de-energised, depending on how they are configured on the URB 60 and on what is currently
required.
Behaviour in the event of a malfunction
In the event of a malfunction, the LED lights up red and the MIN/MAX relays become de-energised. The
OPEN/CLOSED relays behave as described in the tables on page 27.
Faulty equipment jeopardises system safety.
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If the NRR 2-60 level controller does not behave as described on this page, it may be faulty.
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Perform failure analysis.
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Only replace faulty equipment with identical equipment from GESTRA AG.
Multicolour LED (orange/green/red),
orange = power up/green = running/red = malfunction
