Related Manuals for GESTRA NRR 2-61
Summary of Contents for GESTRA NRR 2-61
- Page 1 Level Controller NRR 2-61 Installation & Operating Manual 819694-01 E n g l i s h...
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Page 2: Table Of Contents
Electrical connection safety notes ....................... 17 Wiring diagram for NRR 2-61 level controller ..................... 18 Wiring diagram for NRR 2-61 level controller as a 3C controller ............... 19 Electrical connection ............................ 20 Bus line, cable length and cross-section ....................20 Connecting the 24 V DC power supply ..................... - Page 3 What to do in the event of system malfunctions..................29 Taking out of service ............................ 29 Disposal ................................ 29 Returning decontaminated equipment ......................29 Declaration of Conformity; Standards and Directives ................. 30 NRR 2-61 - Installation & Operating Manual - 819694-01...
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Page 4: Content Of This Manual
You can find the latest Installation & Operating Manuals on our website: http://www.gestra.com © Copyright All rights reserved. Any misuse, particularly reproduction and dissemination to third parties, is not permit- ted. The General Terms & Conditions of GESTRA AG apply. Scope of delivery/Product package 1 x Level Controller NRR 2-61 ■... -
Page 5: How To Use This Manual
Bullet points in lists ◆ Keys to illustrations Additional information Read the relevant Installation & Operating Manual Hazard symbols in this Manual Danger zone/Dangerous situation Danger of death from electric shock NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 6: Types Of Warning
Warning of a dangerous situation that may possibly result in death or serious injury. CAUTION CAUTION Warning of a situation that may result in minor or moderate injury. ATTENTION ATTENTION Warning of a situation that will result in damage to property or the environment. NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 7: Specialist Terms/Abbreviations
This type of electrically non-conductive connection makes sure the input and output circuits are electrically isolated from each other. PI controller Controller with proportional (P) and integral (I) control. SELV Safety Extra Low Voltage NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 8: Usage For The Intended Purpose
Usage for the intended purpose The NRR 2-61 level controller can be used together with the NRG 26-60 or NRG 26-61 level electrodes as a level control system and limit switch in steam boilers and hot water installations, and in condensate and feedwater tanks. -
Page 9: Improper Use
Improper use There is a danger of death due to explosion if the equipment is used in potentially explo- sive atmospheres. Do not use the equipment in potentially explosive atmospheres. NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 10: Basic Safety Notes
Check that the plant is not carrying live voltage before commencing work. ■ Faulty equipment jeopardises plant safety. If the NRR 2-61 level controller does not behave as described on pages 25 to 26, it ■ may be faulty. Perform failure analysis. -
Page 11: Function
When MIN/MAX water level alarms arise, the appropriate output contact opens. Possible combinations of functions and equipment Combining the NRR 2-61 level controller with the level electrodes and the URB 60 visual display and operating unit gives you the following common functions:... -
Page 12: Technical Data
1 x actual value output OUT 1: 4-20 mA, e.g. for an actual value display ■ 1 x analogue output OUT 2: 4-20 mA, manipulated variable Yw ■ Max. load resistance 500 W ■ NRR 2-61 - Installation & Operating Manual - 819694-01... - Page 13 ◆ 2 x 1.5 mm stranded with sleeve ◆ Terminal box attachment: Mounting clip on support rail TH 35 (to EN 60715) ■ Weight Approx. 0.5 kg ■ NRR 2-61 - Installation & Operating Manual - 819694-01...
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Page 14: Example Name Plate/Identification Nrr 2-61
9 Wiring diagram 0 Component type approval a Material number-serial number b Manufacturer c Component type approval d Disposal information The date of production is printed on the side of the equipment. NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 15: Factory Settings
When actuating a frequency-controlled pump - MIN2/MAX2 relay function: Enable pump 1/2 (ON/OFF) Controlled operation: Automatic ■ Pump 1: ■ Pump 2: ■ On threshold: ■ Off threshold: ■ Forced switchover: ■ NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 16: Functional Elements And Dimensions
Screws (M3) 4-pole code switch, for setting the controller Equipment settings, group and baud rate see page 23. Front membrane with status LED, see page 24 Terminal box Support rail TH 35 NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 17: Installing The Nrr 2-61 Level Controller
Installing the NRR 2-61 level controller The NRR 2-61 level controller snaps onto a TH 35 support rail in a control cabinet. DANGER DANGER There is a risk of electric shock during work on electrical systems. Switch off the voltage to the plant before you install the equipment. -
Page 18: Wiring Diagram For Nrr 2-61 Level Controller
MAX 1 CAN bus CH = CAN High Supply voltage CL = CAN Low Fuse provided on site S = shield M0.5A Actual value output Analogue output, manipulated variable Fig. 6 NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 19: Wiring Diagram For Nrr 2-61 Level Controller As A 3C Controller
Wiring diagram for NRR 2-61 level controller as a 3C controller Relay output MIN1 MIN2 MAX2 MAX1 alarm alarm alarm alarm MIN 1 MIN 2 MAX 2 MAX 1 CAN bus CH = CAN High Supply voltage Analogue input 3:... -
Page 20: Electrical Connection
■ influences. Connecting the 24 V DC power supply The NRR 2-61 level controller is supplied with 24 V DC. ■ A safety power supply unit that delivers a Safety Extra Low Voltage (SELV) must be used to supply the ■... -
Page 21: Wiring Diagram Of Can Bus System
The NRR 2-61 level controller is equipped with an internal terminating resistor. ■ To activate the internal terminating resistor in the NRR 2-61 level controller, insert a jumper between the terminals (“Option 120Ω” and “CH”). The CAN bus network must not be interrupted during operation! ■... -
Page 22: Changing The Equipment Settings
Check that the plant is not carrying live voltage before commencing work. ■ You can change the baud rate and controller group of the NRR 2-61 level controller at any time using code switch D (see Fig. 5). Make changes before installing the level controller, when access is easier. -
Page 23: Configuring The Controller Group And Baud Rate
Configure the level controller as described in the Installation & Operating Manual of the URB 60 visual display and operating unit. You will find the latest Installation & Operating Manuals for the system components and ■ operating units in Fig. 1 on our website: http://www.gestra.com NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 24: Setting The Measuring Range
You can determine these values for the connected level electrode by performing calibration. To do this, read the relevant information in the Installation & Operating Manual of the NRG 26-60 or NRG 26-61 level electrode. NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 25: Bringing Into Service - Starting, Operation And Alarm
The MIN2/MAX2 relays are configured as the MIN/MAX alarm on the URB 60 This conforms to the set function for actuating a continuous control valve. Startup During startup, all the relays of the NRR 2-61 continuous controller 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 MIN2 and MAX2 switchpoints, the relays (MIN1/MIN2, MAX1/MAX2) of the controller are energised. -
Page 26: Bringing Into Service - Starting, Operation And Alarm
Bringing into service – starting, operation and alarm The MIN2/MAX2 relays are configured as the pump 1/2 enable (ON/OFF) on the URB 60 Startup During startup, all the relays of the NRR 2-61 continuous controller are de-energised. The LED lights up orange. Normal operation During normal operation, when the supply voltage is on and the measured level is within the MIN1 and MAX1 switchpoints, the MIN1 and MAX1 relays of the controller are energised. -
Page 27: System Malfunctions
Disconnect all poles of the supply cable from the mains and secure so they cannot be ■ switched back on. Check that the plant is not carrying live voltage before commencing work. ■ Interrupting the CAN bus during operation triggers an alarm. ■ NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 28: Indication Of System Malfunctions
MAX1 MIN2 MAX2 Breakdown in CAN bus communication De-ener- De-ener- Enable pump 1 or 2 gised gised Electrode failure De-ener- De-ener- De-ener- De-ener- Interruption to power supply gised gised gised gised NRR 2-61 - Installation & Operating Manual - 819694-01... -
Page 29: What To Do In The Event Of System Malfunctions
Check that the equipment is not live. Unscrew and pull off the upper and lower terminal strips, see Fig. 5 A; B Release the slider holder on the base of the equipment, and detach the NRR 2-61 level controller from the support rail. -
Page 30: Declaration Of Conformity Standards And Directives
You can find details on the conformity of the equipment and the applicable standards and directives in the Declaration of Conformity and associated certificates. You can download the Declaration of Conformity from www.gestra.com and request relevant certifi- cates by writing to the following address: GESTRA AG Münchener Straße 77... - Page 31 For your notes NRR 2-61 - Installation & Operating Manual - 819694-01...
- Page 32 Germany Tel. +49 421 3503 0 Unit 1 Sopwith Park, Royce Close, +49 421 3503 393 West Portway Business Park, Andover, e-mail info@de.gestra.com Hampshire SP10 3TS Website www.gestra.com United Kingdom 819694-01/10-2022cm · GESTRA AG · Bremen · Printed in Germany...
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