Related Manuals for GESTRA NRS 2-40
Summary of Contents for GESTRA NRS 2-40
- Page 1 Level Switch Type NRS 2-40 Original Installation Instructions 810371-05 E n g l i s h...
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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 ............................13 Note ..............................14 CAN bus voltage supply ........................14 Attention ...............................14 Wiring diagram ..........................15 – 17 Key ...............................18 CAN bus wiring diagram ........................18 Attention ...............................19 Note ..............................19 Tools ..............................19 Basic Settings CAN bus ...............................20 Node ID ..............................21...
- Page 4 Contents – continued – Page Test NRS 240..............................30 Alarm NRS 240..............................31 Highlevel (MAX) alarm .........................31 Lowlevel (MIN) alarm ...........................31 Malfunctions Faultfinding list for troubleshooting ......................32 System Malfunctions Danger ..............................33 NRS 240..............................33 Danger ..............................34 Systematic malfunction analysis ......................34 System malfunction 1 ...........................35 System malfunction 2 ...........................35 System malfunction 3 ...........................36 System malfunction 4 ...........................37...
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Page 5: Important Notes
Important Notes Usage for the intended purpose Use level switch NRS 240 in conjunction with level electrode NRG 2640 only for monitoring and regulating the level of conductive liquids. Safety note The equipment must only be installed and commissioned by qualified and adequately trained personnel. Maintenance and retrofitting must only be performed by entrusted personnel who –... -
Page 6: Explanatory Notes
Explanatory Notes Scope of supply NRS 2-40 1 Level switch type NRS 240 (plugin unit in plastic case with box terminals) 1 Terminating resistor 120 Ω 1 Installation & Operating manual Description Use level switch type NRS 240 in combination with level electrode type NRG 2640 for level monitoring. -
Page 7: Technical Data
Technical data NRS 2-40 Type approval no. NRS 240: TÜV XX399 Input / Output Interface for CAN bus to DIN ISO 11898 using CANopen Output – voltage supply for electrodes Power supply 24 V DC, shortcircuit protected Analogue output 4 – 20 mA, load 500 Ω for display of actual value. -
Page 8: Corrosion Resistance
Technical data – continued – Corrosion resistance If the equipment is used for its intended purpose, its safety is not impaired by corrosion. Name plate / marking NRS 2-40 Steuergerät Betriebsanleitung control device beachten appareille de commande See installation Node ID:___ ___ ___... - Page 9 Design NRS 2-40 GESTRA 16 17 18 19 20 21 22 23 24 25 26 28 29 30 NRS 2-40 Test 2 3 4 5 6 7 8 9 0 9 10 11 12 13 14 15 Fig. 3...
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Page 10: Functional Elements
Functional Elements NRS 2-40 GESTRA NRS 2-40 Test Fig. 4 16 17 18 19 20 21 22 23 24 25 26 28 29 30 GESTRA NRS 2-40 Test 2 3 4 5 6 7 8 9 0 Fig. 5... -
Page 11: Key
Screws for terminal strip Enclosure Supporting rail TS 35 x 15 to DIN EN 50022 Installation NRS 2-40 Installation on mounting rail 1. Clip control unit onto mounting rail 35 x 15 mm (DIN EN 50022). 2. Align control unit, Fig. 7 Tools Screwdriver (5.5/100) -
Page 12: Example Of Installation
Installation – continued – Example of installation 17 18 19 20 21 22 23 24 GESTRA NRS 2-40 Test 11 12 Fig. 6 17 18 19 20 21 22 23 24 GESTRA NRS 2-40 Test 11 12 Fig. 7... -
Page 13: Electrical Connection
Electrical Connection Control cable NRS, NRR, LRR, TRS, URB 1 Note that screened multicore twistedpair control cable is required for the BUS line, e.g. UNITRONIC ® BUS CAN 2 x 2 x ... mm or RE2YCYVfl 2 x 2 x ... mm Control cable assemblies (2 x 2 x 0.32 mm with connector and coupler) of various lengths are available as optional extra. -
Page 14: 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 15: Wiring Diagram
Electrical Connection – continued – Wiring diagram 17 18 19 20 21 22 23 24 GESTRA NRS 2-40 Test 11 12 24V DC 120 Ω CAN-Bus Fig. 8... - Page 16 Electrical Connection – continued – Wiring diagram – continued – Pump contactor 17 18 19 20 21 22 23 24 GESTRA NRS 2-40 Test 11 12 24V DC 120 Ω CAN-Bus Fig. 9 Discharge control – Pump OFF at low level (MIN)
- Page 17 Electrical Connection – continued – Wiring diagram – continued Pump contactor 17 18 19 20 21 22 23 24 GESTRA NRS 2-40 Test 11 12 24V DC 120 Ω CAN-Bus Fig. 10 Fill control – Pump OFF at high level (MAX)
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Page 18: Key
Electrical Connection – continued – Mains voltage MAX limit contact (MAX alarm) Pump control Fill control: = Pump OFF = Pump ON Discharge control: = Pump ON = Pump OFF MIN limit contact (MIN alarm) Actual value output 420 mA Terminating resistor 120 Ω, RES 1 or RES 2 Twisted pair control cable for CAN bus line Valve actuator... -
Page 19: Attention
Electrical Connection – continued – Attention Wire equipment in series. Startype wiring is not permitted. Interlink screens of control cables such that electrical continuity is ensured and connect them once to the central earthing point (CEP). If equipotential currents may occur, e.g. -
Page 20: Basic Settings
The fourcore bus cable serves as power supply and data highway for highspeed data exchange. The CAN address (Node ID) can be set between 1 and 123. The equipment is configured at our works and ready for service with other GESTRA system components without having to set the node ID. -
Page 21: Node Id
Basic Settings – continued – Node ID Low-level limiter NRS 140 NRG 1640 (1) NRG 1640 (2) Reserved Reserved X + 1 X + 2 X + 3 X + 4 Factory setting Safety system for steam boilers with superheater NRS 140.1 NRG 1640 (1) NRG 1640 (2) -
Page 22: Factory Setting
Basic Settings – continued – Factory setting The level switch features the following factory set default values: Relay with energizing delay switchpoint 1: 1s Baud rate: 250 kb/s Relay with energizing delay switchpoint 2: 1s Control equipment: 1 Relay with energizing delay switchpoint 3: 1s Node ID: 039 Relay with energizing delay switchpoint 4: 1s Control equipment: 2... -
Page 23: Assigning / Changing Node Id
Detach the lower terminal strip 9 (Fig. 6) in order to change the code switch 8 settings. Attention We recommend that you commission the CAN bus equipment with their GESTRA default factory settings. Make sure that no node ID is used twice in the CAN bus network! -
Page 24: Commissioning
Commissioning Using the operating & display unit URB... If you use the operating unit URB... make all adjustments via its user interface. NRS 2-40 Apply power to the unit. GESTRA NRS 2-40 The four indicator LEDs flash rapidly. The LED “Power” lights up. - Page 25 – continued – Establishing measuring range – continued – Press button briefly. GESTRA NRS 2-40 Note: In the event of a system malfunction, the LED(s) “Bus status” and/or “Power” Test will be flashing rapidly when in program mode. Quit program mode and analyse the system malfunction (see pages 36 –...
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Page 26: Switchpoints And Proportional Band
Commissioning – continued – Switchpoints and proportional band NRG 26-40 Fig. 21 You can establish four switchpoints within the selected measuring range. -
Page 27: Establishing Switchpoints
Commissioning – continued – Establishing switchpoints Press button briefly. GESTRA NRS 2-40 Raise or lower the liquid level in the vessel until the desired value is reached. Use button if you want to establish a Test different switchpoint first. Press button briefly. - Page 28 Commissioning – continued – Establishing switchpoints – continued – Press button briefly. GESTRA NRS 2-40 Switchpoint 3 is now saved. Test Press button briefly. GESTRA NRS 2-40 Switchpoint 2 is now active. Test Press button briefly. GESTRA NRS 2-40 Raise liquid level until switchpoint 2 within the adjusted measuring range is reached.
- Page 29 Commissioning – continued – Establishing switchpoints – continued – Press button briefly. GESTRA NRS 2-40 Raise liquid level until switchpoint 1 within the adjusted measuring range is reached. Test Press button twice briefly. GESTRA NRS 2-40 Switchpoint 1 is saved.
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Page 30: Operation
Operation NRS 2-40 Normal operation – switching controller is GESTRA working. NRS 2-40 All LEDs go out as soon as the setpoint is reached. Test The LED “Power” is illuminated. Test NRS 2-40 Press button briefly. GESTRA NRS 2-40 The test mode (relay test) is now active for 5 seconds. -
Page 31: Alarm
Alarm NRS 2-40 There are two alarm conditions: GESTRA NRS 2-40 High-level alarm (MAX alarm) Low-level alarm (MIN alarm) Test High-level (MAX) alarm LED 1 changes after the deenergizing delay GESTRA from rapid flashing to lighting. flashing illuminated NRS 1-41... -
Page 32: Malfunctions
Malfunctions Fault-finding list for troubleshooting Device fails to work – indication of malfunction Fault: In spite of correct wiring and commissioning of the equipment an interference signal is indicated. Remedy: The interference signal is caused by H. F. interferences coming from the installation. For interference suppression of the voltage supply we supply ferrite rings, stock code 147253. -
Page 33: System Malfunctions
Cut off power supply before mounting or removing the terminal strips or the housing cover. NRS 2-40 Faulty installation and/or configuration of CAN bus components, excessive temperatures in the devices, defective electronic component parts or electromagnetic interferences of the supply system can result in system malfunctions. -
Page 34: Danger
System Malfunctions – continued – 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 or the housing cover. Systematic malfunction analysis The sources of malfunctions occurring in CAN bus systems operating with several busbased stations must be analysed systematically since faulty components or incorrect settings can give rise to nega tive interactions with intact bus devices in the CAN bus system. -
Page 35: System Malfunction 1
– continued – System malfunction 1 LEDs flashing slowly GESTRA The four indicator LEDs flash slowly. NRS 2-40 High/low-level alarm Test Fault: The max. admissible temperature in the electrode terminal box is exceeded. Remedy: Insulate electrode flange to protect the equipment against heat radiation. -
Page 36: System Malfunction 3
System Malfunctions – continued – System malfunction 3 LED “Bus status” flashes slowly. GESTRA NRS 2-40 Test LED flashing slowly Fault: Malfunction in CAN bus. Abhilfe: Restart system. LED “Bus status” flashes slowly. GESTRA High/low-level alarm NRS 2-40 Test LED flashing slowly Fault: Data transfer in CAN bus interrupted. -
Page 37: System Malfunction 4
System Malfunctions – continued – System malfunction 4 LED “Power” flashes slowly. GESTRA NRS 2-40 Test LED flashing slowly Fault: The power supply unit (PSU) is overloaded and may be misused for other components. Remedy: Check load of power supply unit. Be sure to use the PSU only for the voltage supply of busbased network components. -
Page 38: Decommissioning
For more information on the conformity of the equipment to European directives, please refer to our Declaration of Conformity or our Declaration of Manufacturer. You can ask for a copy of the current Declaration of Conformity / Declaration of Manufacturer or you can find them at www.gestra.de/dokumente. - Page 39 For your notes...
- Page 40 Agencies all over the world: www.gestra.de GESTRA AG Münchener Straße 77 28215 Bremen Germany Telefon +49 421 35030 Telefax +49 421 3503393 Email info@de.gestra.com www.gestra.de 81037105/072017cm (80846107) · GESTRA AG · Bremen · Printed in Germany...
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