GESTRA NRS 2-50 Installation Instructions Manual Download Page 24

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819179-03/04-2017cm (808861-03) · GESTRA AG · Bremen · Printed in Germany

GESTRA AG

Münchener Straße 77
28215 Bremen
Germany
Telefon  +49 421 3503-0
Telefax   +49 421 3503-393
E-mail   [email protected]
Web www.gestra.de

Agencies all over the world:

www.gestra.de

Summary of Contents for NRS 2-50

Page 1: ...1 E N English Level Switch NRS 2 50 NRS 2 51 Original Installation Instructions 819179 03 ...

Page 2: ...s 5 Technical data NRS 2 50 NRS 2 51 6 Scope of supply 7 In control cabinet Mounting level switch Dimensions NRS 2 50 NRS 2 51 8 Key 8 Installation in control cabinet 8 Name plate marking 9 In control cabinet Wiring level switch Wiring diagram for level switch NRS 2 50 10 Key 10 Wiring diagram for level switch NRS 2 51 11 Key 11 Connecting supply voltage 12 Connecting output contacts 12 Connecting...

Page 3: ...play 16 Establishing measuring range 17 Commissioning procedure Setting parameters 18 Setting the measuring range 19 Operation alarm and test Indicators 20 Level controller NRR 2 50 Displays 21 Level controller NRR 2 51 Displays 21 Troubleshooting Indication diagnosis and remedy 22 Further Notes Action against high frequency interference 23 Decommissioning replacing the equipment 23 Disposal 23 ...

Page 4: ...or discharge control switch selectable If the lower or upper switchpoint for water level control is reached the controller output switches over according to the preset function and consequently switches the feedwater pump on or off The amber LED is illuminated when the feedwater pump is switched on by the level switch Any faults or malfunctions in the level electrode the level transmitter the elec...

Page 5: ...t meets the requirements of the Low Voltage Directive 2014 35 EU and the EMC Direc tive 2014 30 EU Note on the Declaration of Conformity Declaration by the Manufacturer For details on the conformity of our equipment according to the European Directives see our Declara tion of Conformity or our Declaration of Manufacturer The current Declaration of Conformity Declaration of Manufacturer are availab...

Page 6: ...ion NRS 2 50 NRS 2 51 1 analogue output 4 20 mA max load 500 ohm e g for actual value indication Indicators and adjustors 1 rotary button with integrated pushbutton Test for simulating MIN MAX alarm and setting the parameter 1 seven segment LED display four digits green 2 LEDs red for MIN MAX alarm 1 LED amber e g for feedwater pump ON NRS 2 51 1 code switch 4 poles for configuration Housing Housi...

Page 7: ...it can be put into operation 24 hours Relative humidity max 95 no moisture condensation Approvals TÜV certificate VdTÜV Bulletin Water Lever 100 Water Level 100 Requirements made on water level limiting control equipment Type approval no TÜV WR XX 426 see name plate UL cUL CSA Approval UL 508 and CSA C22 2 No 14 13 Standards for Industrial Control Equipment File E243189 Technical data continued Sc...

Page 8: ... Upper terminal strip 2 Lower terminal strip Key Installation in control cabinet The level switch NRS 2 50 NRS 2 51 is clipped onto the support rail type TH 35 EN 60715 in the control cabinet Fig 1 4 3 Housing 4 Supporting rail type TH 35 EN 60715 Fig 1 4 3 1 2 46 74 120 15 ...

Page 9: ...ature External fuse for output contacts Approvals Disposal note Supply voltage Power consumption Fuse provided on site In control cabinet Mounting level switch continued Serial number Actual value output Name plate NRS 2 50 top Name plate NRS 2 51 top Manufacturer TÜV WR XX 426 Connecting level electrode level transmitter ...

Page 10: ...be connected parallel connection 7 Level transmitter NRGT 26 1 4 20 mA screen connected in terminal box Up to three NRS NRR 2 5 can be connected series connection 8 Central earthing point CEP in control cabinet 9 MIN output contact de energizing delay 3 sec 0 MAX output contact de energizing delay 3 sec a Actual value output 4 20 mA Key NRS 2 50 M 0 5 A semi delay 5 7 8 0 9 6 Fig 3 9 0 8 MIN MIN M...

Page 11: ...cted parallel connection 7 Level transmitter NRGT 26 1 4 20 mA screen connected in terminal box Up to three NRS NRR 2 5 can be connected series connection 8 Central earthing point CEP in control cabinet 9 MIN output contact de energizing delay 3 sec 0 MAX output contact de energizing delay 3 sec a Pump output contact b Actual value output 4 20 mA Key 5 7 9 8 a 0 6 NRS 2 51 Fig 4 M 0 5 A semi delay...

Page 12: ...ing functions Provide an external slow blow fuse 2 5 A for the output contacts When switching off inductive loads voltage spikes are produced that may impair the operation of con trol and measuring systems Connected inductive loads must be provided with suppressors such as RC combinations as specified by the manufacturer Tools n Screwdriver size 3 5 x 100 mm completely insulated according to VDE 0...

Page 13: ...t connecting cables leading to the equipment are segregated and run separately from power cables n The level transmitter must be separately connected to its own voltage supply Factory settings Level switch NRS 2 50 n De energizing delay 3 sec factory set n Voltage input for connecting a level electrode type NRG 21 or type NRG 26 21 n MAX switchpoint AL Hi 80 n MIN switchpoint AL Lo 20 n Calibratio...

Page 14: ...y the code switch j setting To change the code switch setting proceed as follows n Cut off supply voltage n Remove lower terminal strip Fig 4 n Insert a screwdriver to the right and left of the arrow markings between the terminal strip and the front frame n Unlock terminal strip on the left and right side For this purpose move screwdriver in direction of the arrow n Remove the terminal strip After...

Page 15: ...t for connecting level transmitter NRGT 26 1 ON Level switch NRS 2 51 S 2 S 3 Input for connecting level electrode NRG 21 or NRG 26 21 OFF Input for connecting level transmitter NRGT 26 1 ON Fill control OFF Discharge control ON grey factory setting Toggle switch white Attention When connecting level transmitter NRGT 26 1 set the upper and the lower end of the measuring range only in the transmitt...

Page 16: ...or NRG 26 21 is connected establish lower end of measuring range CAL P Calibrate adjustable between 25 and 100 CAL H Calibrate H establish upper end of measuring range Indicated when in parameterization mode quit Quit Input not confirmed done Done Input confirmed Indicated if malfunctions occur E 005 Error Level electrode transmitter defective measuring voltage current too low E 006 Error Level el...

Page 17: ...itter A Lower end of measuring range adjustable B Upper end of measuring range adjustable C Measuring range mm xxx D Inactive range E Max length of installation 238 C Adjust the lower and upper end of the measuring range for level control The resulting measuring range C is the active control range Please calculate the percentage value of the measuring range A B C NRG 2 NRGT 26 1 D D 37 26 E ...

Page 18: ...o left 2nd 3rd or 4th digit can be changed by turning the rotary button To increase the value turn rotary button to the right to decrease turn it to the left After input press push button within 3 sec and hold down done is indicated for a moment Then the display toggles between parameter and the new value setting Input is confirmed System switches back to parameter If input is not confirmed within...

Page 19: ...on the display After a short time 0100 appears Input is confirmed actual value output 20 mA Level electrode NRG 2 only Setting the measuring range option 2 Action Display Function Reduce water level until start of measuring range A Select parameter CAL L After a short time a hexadecimal number flashes Calibrate start of measuring range Press push button The current hexadecimal number flashes Press...

Page 20: ... between 0 100 Level Switch NRS 2 51 only Setting switchpoints for pump fill control Select parameter SP Lo enter and save the desired percentage Switchpoint setting for pump ON between 0 100 Select parameter SP Hi enter and save the desired percentage Switchpoint setting for pump OFF between 0 100 Operation Activity Display Function Water level between MIN and MAX MIN and MAX LEDs are not illumin...

Page 21: ...hed release push button Equipment returns to operating mode Note If you continue to hold down the push button a new test is started You can abort the test any moment by releasing the push button Turn the rotary button until the actual value is shown If no operation is performed the actual value will be indicated automatically after 30 sec continued Checking functions of MIN MAX output contacts Lev...

Page 22: ... measuring voltage 7 VDC Check level electrode and if necessary replace it Check electrical connection Level transmitter defective measuring current 20 mA Check level transmitter and if necessary replace it Check electrical connection E 012 Beginning and end of measuring range have been switched round Re adjust the measuring range E 013 MIN switchpoint above MAX switchpoint Re adjust the switchpoi...

Page 23: ...ontrol cabinet n HF interference suppression by means of hinged shell ferrite rings Decommissioning replacing the equipment Disposal For the disposal of the equipment observe the pertinent legal regulations concerning waste disposal If faults occur that are not listed above or cannot be corrected please contact our service centre or authorized agency in your country n Switch off supply voltage and...

Page 24: ...8861 03 GESTRA AG Bremen Printed in Germany GESTRA AG Münchener Straße 77 28215 Bremen Germany Telefon 49 421 3503 0 Telefax 49 421 3503 393 E mail info de gestra com Web www gestra de Agencies all over the world www gestra de ...

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