GESTRA NRR 2-40 Installation Instructions Manual
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GESTRA NRR 2-40 Installation Instructions Manual

Level controller
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E N
E n g l i s h
Level Controller
NRR 240
Original Installation Instructions
81036906
1

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Summary of Contents for GESTRA NRR 2-40

  • Page 1 Level Controller NRR 240 Original Installation Instructions 81036906 E n g l i s h...

  • Page 2: Table Of Contents

    Contents Page Important Notes Usage for the intended purpose ......................5 Safety note ............................. 5 Danger ..............................5 Attention ..............................5 LV (Low Voltage) Directive and EMC (Electromagnetic Compatibility) ............5 ATEX (Atmosphère Explosible) .........................5 Explanatory Notes Scope of supply ............................6 Description .............................6 Function ..............................
  • Page 3 Contents – continued – Page Electrical Connection Control cable ............................14 Note ..............................15 CAN bus voltage supply ........................15 Attention ..............................15 Wiring diagram ..........................16, 17 Key ...............................18 CAN bus wiring diagram ........................19 Attention ...............................19 Note ..............................20 Tools ..............................20 Basic Settings Bus cable..............................
  • Page 4 Contents – continued – Page Test NRR 240 ............................. 32 Alarm NRR 240 ............................. 33 MAX alarm ............................33 MIN alarm ............................. 33 Operational malfunctions Fault finding list for troubleshooting ......................34 System Malfunctions Danger ..............................35 NRR 240 ............................. 35 Danger ..............................36 Systematic malfunction analysis ......................36 System malfunction 1 ...........................37 System malfunction 2 ...........................37...

  • Page 5: Important Notes

    Important Notes Usage for the intended purpose Use the level controller NRR 240 only in conjunction with GESTRA level electrode NRG 2640 for controlling liquid levels of conductive fluids. Safety note The equipment must only be installed and commissioned by qualified and competent staff. Retrofitting and maintenance work must only be performed by qualified staff who –...

  • Page 6: Explanatory Notes

    If the CAN bus line is interrupted the level controller sends a visual signal to indicate a malfunction and the relays 1 and 4 will be instantaneously deenergized. (fail safe position). GESTRA's control terminal & display units URB enable advanced features such as adjustable energizing and deenergizing delays of the output relays (1 to 25sec.) System components NRG 2640...

  • Page 7: Technical Data

    Technical Data NRR 240 Type approval no. NRR 240: TÜV XX399 Input/Output Interface for CAN bus to DIN ISO 11898 CANopen. Feedback potentiometer 1000 Ω. Output voltage supply for electrodes Power supply 24 V DC, shortcircuit protected. Analog output 420 mA, load 500 Ω for indication of actual value (optional). Analog control output for manipulated variable, 420 mA, max.

  • Page 8: Corrosion Resistance

    Technical Data – continued – Corrosion resistance If the equipment is used for the intended purpose, its safety is not impaired by corrosion. Name plate / marking NRR 2-40 Steuergerät Betriebsanleitung control device beachten appareille de commande See installation Node ID:___ ___ ___...

  • Page 9: Dimensions

    Technical Data – continued – Dimensions Fig. 2...

  • Page 10: Design

    Design NRR 240 Fig. 3...

  • Page 11: Functional Elements

    Functional Elements NRR 240 Fig. 4 Fig. 5...

  • Page 12: Key

    Design / Functional Elements / Installation Alarm Malfunction Status LED LED 1 Switchpoint 1 MAX alarm Multifunction LED 2 Closing control valve Not assigned Multifunction LED 3 Opening control valve Not assigned Multifunction LED 4 Switchpoint 4 MIN alarm Multifunction LED Bus status LED Power Enter / Test...

  • Page 13: Example Of Installation

    Installation – continued – Example of Installation Fig. 6 Fig. 7...

  • Page 14: Electrical Connection

    Electrical Connection Control cable NRS, NRR, LRR, TRS, URB 1 To wire the equipment, multicore twistedpair control cable must be used for the bus line, e. g. UNI TRONIC ® BUS CAN 2 x 2 x ... mm or RE2YCYVfl 2 x 2 x ... mm Control cable assemblies (2 x 2 x 0.32 mm²...

  • Page 15: Note

    If a safety power supply unit (e. g. SITOP smart, 24 V, 2.5 A) is used for the voltage supply of the CAN bus do not tap the supply voltage from the terminals 1 and 5 of the GESTRA control devices.

  • Page 16: Wiring Diagram

    Electrical Connection – continued – Wiring diagram Fig. 8 NRR 2-40 as 3-position stepping controller Fig. 9 1000 Ω Valve actuator...
  • Page 17 Electrical Connection – continued – Wiring diagram Fig. 10 NRR 2-40 as continuous controller...

  • Page 18: Key

    Electrical Connection – continued – Mains supply MAX limit contact (MAX alarm) Activation control of valve actuator Fill control: = Valve CLOSED 23 = Valve OPEN 25 Discharge control: = Valve OPEN 23 = Valve CLOSED 25 MIN limit contact (MIN alarm) Actual value output 420 mA (optional) Controller output, analogue, manipulated variable Y, 420 mA Input for feedback potentiometer 1000 Ω...

  • Page 19: Can Bus Wiring Diagram

    Electrical Connection – continued – CAN bus wiring diagram URB 2 NRS, NRR, LRR, NRG, LRG, TRS, URB 1 EF, URZ RES 1 RES 2 Fig. 11 Attention Wire equipment in series. Startype wiring is not permitted! Link screens of control cables such that electrical continuity is ensured and connect them once to the central earthing point (CEP).

  • Page 20: Note

    The CAN address (node ID) can be set between 1 – 123. The equipment has already been configured at our works for operation with other GESTRA components and can be used straight away without having to set the node ID.

  • Page 21: Node Id

    Basic Settings – continued – Node ID Water level limiter NRS 140 NRG 1640 (1) NRG 1640 (2) Reserved Reserved X + 1 X + 2 X + 3 X + 4 Factory setting Safety system for steam boilers with superheater NRS 140.1 NRG 1640 (1) NRG 1640 (2)

  • Page 22: Factory Setting

    Basic Settings – continued – Factory setting The level controller features the following factory set default values: Baud rate: 250 kb/s Relay deenergizing delay, switchpoint 1: 1s : 20 % Relay deenergizing delay, switchpoint 4: 1s Proportional range X Node ID: 40 Relay deenergizing delay, switchpoint 1: 3s Switchpoint 1: 80 % Relay deenergizing delay, switchpoint 4: 3s...

  • Page 23: Establishing / Changing Node Id

    Basic Settings – continued – Establishing / changing node ID If several identical systems are to communicate in a CAN bus network, allocate a different node ID for each system (e. g. limiter, controller, etc). In most cases it is sufficient to commission the equipment with the default factory settings.

  • Page 24: Dead Band

    Basic Settings – continued – Dead band To prevent oscillation or repeated activationdeactivation cycles of the controlled system, a deadband can be defined for the septpoint “W”. The setpoint is defined by the proportional range which is limited by the switchpoints 2 and 3. To set the code switch 8 remove the terminal strip 9.
  • Page 25 To set the dead band refer to Fig. 16. Dead band in this example: 2 % Apply mains voltage. GESTRA NRR 2-40 The four status LEDs are flashing rapidly. If the LED “Power” is alight, the adjustment was successful. Test If the LED “Bus status”...

  • Page 26: Commissioning Procedure

    When using the operating device URB ... all parameters can be set via its user interface. NRR 240 Apply mains voltage. GESTRA NRR 2-40 The four status LEDs are flashing rapidly. The LED “Power” is illuminated. The system test takes 2 seconds.
  • Page 27 Commissioning – continued – Setting measuring range – continued – Press button briefly. Attention: In the event of a system malfunction, the LED(s) “Bus status” and/or “Power” will be flashing rapidly when in program mode. Quit program mode and analyse the system malfunction (see pages 36 –...

  • Page 28: Switchpoints And Proportional Range

    Commissioning – continued – Switchpoints and proportional range NRG 2640 Fig. 18 You can establish two switchpoints and the proportional band X within the control range. 80 % 90 % 70 % 20 % 50 % 45 % 10 % 35 % 20 % 10 %...

  • Page 29: Establishing Switchpoints And Proportional Range

    Commissioning – continued – Establishing switchpoints and proportional range Press button briefly. Raise or lower the liquid level in the vessel to the desired value. Use button if you first want to establish a different switchpoint or the proportional band. Press button briefly.
  • Page 30 Commissioning – continued – Establishing switchpoints and proportional range – continued – Press button briefly. Switchpoint 3 is now saved. Press button briefly. The upper limit of the proportional band X (switchpoint 2) is now selected. Press button briefly. Lower or raise the liquid level until switchpoint 2 within the control range is reached.

  • Page 31: Calibrating The Feedback Potentiometer Of An External Control Valve

    Fig. 21 0 Ω Attention Ω For the GESTRA level controller NRR 240 a 1000 feedback potentiometer in an external control valve is required! If the terminals for the feedback potentiometer are not wired or the feedback potentiometer is defective the NRR 240 will work as twoposition controller! Use the control and display units URB 1 and URB 2 for semiautomatic calibration of...

  • Page 32: Operation

    Operation NRR 240 Normal operation, controller is working. The green LEDs 2 and 3 are flashing when the external control valve is being opened or closed. All LEDs go out once the setpoint is reached. The LED “Power” is illuminated. Test NRR 240 Press button...

  • Page 33: Alarm

    Alarm NRR 240 The are two alarm conditions: MAX alarm MIN alarm MAX alarm LED 1 is flashing rapidly. LED 1 is illuminated after the deenergizing flashing illuminated delay has been elapsed. MIN alarm LED 4 is flashing rapidly. flashing illuminated LED 4 is illuminated after the deenergizing delay has been elapsed.

  • Page 34: Operational Malfunctions

    Operational malfunctions Fault finding list for troubleshooting Equipment does not work – no function Fault: LED “Power ON” is not illuminated. Remedy: Switch on mains voltage. Wire equipment according to the wiring diagram. Equipment is not working – a malfunction is indicated Fault: In spite of correct wiring and commissioning of the equipment an error message is indicated.

  • Page 35: System Malfunctions

    System Malfunctions Danger The terminal strip of the equipment is live during operation. This presents the danger of electric shock! Cut off power supply before mounting or removing the terminal strips and the housing cover. NRR 240 Malfunctions occur if CAN bus components have been mounted, wired or configured incorrectly or if electronic component parts are defective, or in the event of excessive heat in the equipment or electrical interference in the supply system.

  • Page 36: Danger

    System malfunctions – continued – Danger The terminal strip of the equipment is live during operation. This presents the risk of severe cases of electric shock! Cut off power supply to the equipment before mounting or removing the terminal strips and the housing cover. Systematic malfunction analysis The sources of malfunctions occuring in CAN bus systems operating with several busbased stations must be analysed systematically since faulty components or incorrect settings can give rise to negative...

  • Page 37: System Malfunction 1

    System malfunction 1 LEDs 1 – 4 are flashing slowly. LEDs are flashing slowly GESTRA MIN / MAX alarm. NRR 2-40 Test Fault: The admissible temperature in the electrode terminal box is exceeded! Remedy: Insulate the electrode flange against thermal radiation.

  • Page 38: System Malfunction 3

    System malfunctions – continued – System malfunction 3 LED bus status is flashing slowly GESTRA NRR 2-40 Test LED is flashing slowly Fault: A malfunction in the CAN bus has occurred. Remedy: Restart system. LED bus status is flashing slowly...

  • Page 39: System Malfunction 4

    For details on the conformity of our equipment according to the European Directives see our Declaration of Conformity or our Declaration of Manufacturer. The current Declaration of Conformity / Declaration of Manufacturer are available in the Internet under www.gestra./de/documents or can be requested from us.
  • Page 40 Agencies all over the world: www.gestra.de GESTRA AG Münchener Straße 77 28215 Bremen Germany Telefon +49 421 35030 Telefax +49 421 3503393 Email info@de.gestra.com www.gestra.de 81036906/072017cm (80846008) · GESTRA AG · Bremen · Printed in Germany...

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