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GESTRA NRS 1-41 Original Installation Instructions

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E n g l i s h
Level Switch
NRS 141
Original Installation Instructions
81083004
1

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Summary of Contents for GESTRA NRS 1-41

  • Page 1 Level Switch NRS 141 Original Installation Instructions 81083004 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 ATEX (Atmosphère Explosible) .........................5 Note on the Declaration of Conformity / Declaration by the Manufacturer ..........5 Explanatory Notes Scope of supply ............................6 Description .............................6 Function ..............................
  • Page 3 Contents – continued – Page Electrical Connection Control cable ............................16 Note ..............................17 CAN bus voltage supply ........................17 Attention ...............................17 Wiring diagram .............................18 Attention ...............................18 Wiring diagram for the sensor plugin connections ................19 Key ...............................19 CAN bus wiring diagram ........................20 Attention ...............................20 Note ..............................
  • Page 4 Contents – continued – Page Operational Malfunctions Danger ..............................27 Fault finding list for troubleshooting ......................27 System Malfunctions Danger ..............................28 Causes ..............................28 Danger ..............................29 Systematic fault finding procedure for system malfunctions ..............29 Error message 1 ...........................30 Error message 2 ...........................31 Error message 3 ...........................32 Error message 4 ...........................32 Error message 5 ...........................33 Error message 6 ...........................33...

  • Page 5: Important Notes

    Important Notes Usage for the intended purpose Use level switch NRS 141 only in conjunction with GESTRA level electrode NRG 1641, NRG 1741 or NRG 1941 for signalling high water level (max. alarm). Safety note The equipment must only be installed and commissioned by qualified staff.

  • Page 6: Explanatory Notes

    Explanatory Notes Scope of supply NRS 141 1 Level switch NRS 141 (plugin unit in plastic case with terminals) 1 Terminating resistor 120 Ω 1 Installation manual Description The switching controller type NRS 141 is a selfmonitoring highwater level limiter with periodic self checking and monitoring feature of the output relay contacts designed to be used in conjunction with one level electrode type NRG 1641, 1741 or 1941.

  • Page 7: Associated Components

    Explanatory Notes – continued – Associated components NRG 1641 Level electrode NRG 1641, PN 40 NRG 1741 Level electrode NRG 1741, PN 63 NRG 1941 Level electrode NRG 1941, PN 160 Design NRS 141 Enclosure of insulating material with terminals for installation in control cabinets. The terminals are externally accessible.

  • Page 8: Technical Data

    Technical Data NRS 141 Type approval no. TÜV · SWB/SHWS · 12403 Type examination certificate Input/Output Interface for CAN bus to ISO 11898 CANopen protocol Output voltage supply for electrode 18 – 36, shortcircuit protected Output for control circuit Two voltfree relay contacts, locally connected in series. Max.

  • Page 9: Corrosion Resistance

    Weight Approx. 0.8 kg Corrosion resistance When used for its intended purpose the safe functioning of the equipment will not be impaired by corrosion. Name plate / Marking NRS 1-41 Steuergerät Betriebsanleitung control device beachten appareille de commande See installation...

  • Page 10: Dimensions

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

  • Page 11: Design

    Design NRS 141 " Fig. 3...

  • Page 12: Functional Elements

    Functional Elements NRS 141 Fig. 4 Fig. 5...

  • Page 13: Key

    Design / Functional Elements – continued – Status LED Alarm Malfunction LED 1 Electrode Highlevel alarm Malfunction alarm LED 2 no function Malfunction alarm LED 3 no function Malfunction alarm LED 4 no function Malfunction alarm LED “Bus status” LED “Power” Enter / Test mode Decrease Increase...

  • Page 14: Installation

    1. Clip switching controller onto mounting rail 35 x 15 mm (DIN EN 50022). 2. Align switching controller, Fig. 7 Note If an external measuring pot is used, each level electrode type NRG 1…41 requires one switching controller type NRS 141 and one GESTRA monitoring unit SRL 640. Tool Screwdriver (5.5/100) Terminal strip Screws for terminal strip "...

  • Page 15: Example Of Installation

    Installation – continued – Example of installation " § Fig. 6 Fig. 7...

  • Page 16: Electrical Connection

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

  • Page 17: 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 18: Wiring Diagram

    Electrical Connection – continued – Wiring diagram & Fig. 8 Attention Do not connect terminals 19 – 24 and 26, 27, 28 and 30! Do not connect terminals 10, 11 and 12!

  • Page 19: Wiring Diagram For The Sensor PlugIn Connections

    Electrical Connection – continued – Wiring diagram for the sensor plugin connections Fig. 9 Fig. 10 Fig. 11 RES 1 RES 2 Mains voltage Safety circuit, uninterrupted, ≥ 18 V AC/DC & Other devices in the safety circuit PhotoMos output 24 V230 V AC/DC, 100 mA. With HWalarm: instantaneous.

  • Page 20: Can Bus Wiring Diagram

    Electrical Connection – continued – CAN bus wiring diagram URB 2 NRS, NRR, LRR, NRG, LRG, TRV NRG, LRG, TRV TRS, URB 1 EF, URZ EF, URZ RES 1 RES 2 Fig. 12 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 21: Note

    The CAN address (node ID) can be set between 1 and 123. The NRS 141 is configured at our works and ready for service with other GESTRA system components without having to set the node ID.

  • Page 22: 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 23: Factory Setting

    If several identical systems are to communicate in a CAN bus network, set a different node ID for each system (e. g. limiter, controller, etc). In most cases the default GESTRA setting can be used. To set code switches 8 and 9 detach the lower terminal strip 0.

  • Page 24: Code Switch Settings

    Basic Settings – continued – Code switch settings Node ID Node ID Fig. 13 (Factory setting) Fig. 14 (Example) Baud rate Cable length 250 kBit/s 125 m 125 kBit/s 250 m 100 kBit/s 335 m 50 kBit/s 500 m 20 kBit/s 1000 m 10 kBit/s 1000 m...

  • Page 25: Commissioning

    Commissioning NRS 141 Apply power to the unit. The four status LEDs flash rapidly. The LED “Power” lights up. The test cycle takes about 3 sec. Note To analyse and eliminate malfunctions that may occur during the commissioning procedure refer to section “System Malfunctions”. Operation NRS 141 Normal operation, electrode exposed.

  • Page 26: Alarm

    Alarm NRS 141 There is one alarm condition: High level alarm for water level limiter Highwater level alarm for water level limiter LED 1 flashes rapidly. LED 1 remains permanently illuminated after the deenergizing delay. Deenergizing delay: 3 sec. (default) Note The switching controller does not have its own lockout circuit.

  • Page 27: Operational Malfunctions

    Operational Malfunctions Danger The terminal strips of the equipment are live during operation. This presents risk of severe cases of electric shock! Cut off power supply to the equipment before mounting or removing the terminal strips or the housing cover! Fault finding list for troubleshooting Switchpoint HW exceeded –...

  • Page 28: System Malfunctions

    System Malfunctions Danger The terminal strips of the equipment are live during operation. This presents risk of severe cases of electric shock! Cut off power supply to the equipment before mounting or removing the terminal strips or the housing cover! Causes 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...

  • Page 29: Danger

    System Malfunctions – continued – Danger The terminal strips of the equipment are live during operation. This presents risk of severe cases of electric shock! Cut off power supply to the equipment before mounting or removing the terminal strips or the housing cover! Systematic fault finding procedure for system malfunctions The sources of malfunctions occurring in CAN bus systems operating with several busbased stations...

  • Page 30: Error Message 1

    System Malfunctions – continued – Error message 1 LED 1 flashes slowly. A system malfunction in level electrode was detected. Hold down button LED 1 and LED 2 are flashing slowly. Fault: The max. admissible temperature in the terminal box of the electrode has been exceeded.

  • Page 31: Error Message 2

    System Malfunctions – continued – Error message 2 LED 3 flashes slowly. A communication malfunction in the bus line between the control unit and level electrode was detected. Hold down button LED 1 flashes slowly. Fault: The bus lines C and C have been mixed up.

  • Page 32: Error Message 3

    System Malfunctions – continued – Error message 3 LED 4 flashes slowly. A malfunction in the level switch has been detected. Fault: No voltage or switchedmode voltage across terminal 25, the selftest is not succesful. Remedy: Wire control unit as first device in the safety circuits and in accordance with wiring diagram (ensure permanent voltage across terminal 25).

  • Page 33: Error Message 5

    System Malfunctions – continued – Error message 5 LEDs 1 to 4 are flashing slowly or LED “Bus status” is flashing slowly. Fault: Data transfer between control unit and electrode interrupted. Remedy: The bus cables have to be correctly connected according to the wiring diagram (observe polarity!).

  • Page 34: Decommissioning

    Decommissioning Danger The terminal strips of the equipment are live during operation. This presents risk of severe cases of electric shock! Cut off power supply to the equipment before mounting or removing the terminal strips or the housing cover! Disposal Dismantle the equipment and separate the waste materials according to the material specification.
  • Page 35 For your Notes...
  • Page 36 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 81083004/112018cm (80855205) · GESTRA AG · Bremen · Printed in Germany...

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