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Electrical Connection

NRS 2-4

Note that screened four-core cable, e. g. I-Y(St)Y 2 x 2 x 0.8 or LIYCY 4 x 0.52 is required for wiring.

Max. length: 500 m.
Wire screw-type connector according to the wiring diagram.

Fig. 3

Wiring diagram

Fig. 3

NRG 211

C28

A30

A24

A28

C30

C24

24V DC

12V DC

NRS 2-4

A22

A20

C 8

A 2

C 12

C 4

A 10

A 6

C22

C20

MAX

12V DC

NRG 211

NRS 2-4

Содержание NRS 2-4

Страница 1: ...1 E N English Level Switch NRS 2 4 Original Installation Instructions 810427 03 ...

Страница 2: ...tibility 4 ATEX Atmosphère Explosible 4 Important Notes Page Explanatory Notes Scope of supply 5 Description 5 Function 5 Design 5 NRS 2 4c 9 NRS 2 4d 9 Tools 9 Installation Electrical Connection NRS 2 4 10 Wiring diagram 10 Key 11 Attention 11 Note 11 Tools 11 NRS 2 4 6 Dimensions 7 Technical Data NRS 2 4 8 Key 8 Functional Elements ...

Страница 3: ...king electrical connection 12 Applying mains voltage 12 Danger 12 Performance test 12 Table 1 12 Operational Malfunctions Danger 13 Fault finding list for troubleshooting 13 Annex Note on the Declaration of Conformity Declaration by the Manufacturer CE 14 ...

Страница 4: ...sioned by qualified and competent staff Retrofitting and maintenance work must only be performed by qualified staff who through adequate training have achieved a recognised level of competence Attention The name plate specifies the technical features of the equipment Note that any piece of equipment without its specific name plate must neither be commissioned nor operated LV Low Voltage Directive ...

Страница 5: ... electrode is depending on the operating condition converted into a measuring voltage The signal decoder allocates the measuring voltage to an operating condition which is indicated by the LEDs on the front panel of the NRS 2 4 The level switch can signal the following four operating conditions n Normal operation n High level alarm n Malfunction in level electrode n Malfunction in connecting cable...

Страница 6: ...sistive 4 A inductive 0 75 A at cos j 0 5 Max contact rating with switching voltage 24 V DC 4 A Contact material silver hard gold plated 2 optocouplers NPN short circuit protected due to current limiting max 70 V 10 mA Indicators and adjustors 1 LED for Alarm 2 LEDs for Malfunction 1 LED for Power Mains voltage 18 36 V DC Power consumption 2 VA Housing material NRS 2 4c Front panel aluminium NRS 2...

Страница 7: ...7 Fig 1 Technical Data continued Dimensions 169 128 5 30 48 6 division units ...

Страница 8: ... Elements NRS 2 4 Fig 2 A C B E D F A 32 pole screw type connector DIN 41612 design D B LED Power C LED Malfunction in connecting line C LED Malfunction in level electrode E LED High level alarm F Fixing screws Key ...

Страница 9: ...unt plastic guide rails in 19 magazine 2 Install screw type connector 3 Insert level switch in 19 magazine and fix it with screws F Tools n Screwdriver 5 5 100 NRS 2 4 d 1 Insert level switch in 19 magazine and fix it with screws F ...

Страница 10: ...g Max length 500 m Wire screw type connector according to the wiring diagram Fig 3 Wiring diagram Fig 3 3 2 1 NRG 211 C28 A30 A24 A28 C30 C24 DC DC 24V DC 12V DC M C16 C18 A18 NRS 2 4 A22 A20 C 8 A 2 C 12 C 4 A 10 A 6 C22 C20 MAX 2 3 4 5 6 1 3 2 1 12V DC 12V DC M M C16 C16 C18 C18 A18 A18 NRG 211 NRS 2 4 NRS 2 4 7 1 7 1 2 3 4 5 6 1 ...

Страница 11: ...h level switches installed in parallel redundancy Key Note n Connect screen only to terminal A18 of the level switch n The monitoring of the level electrode and the connecting lines can be included in the safety circuit For this purpose the safety circuit must also be fed to the relay output Malfunction n The rated voltage is indicated on the name plate n When switching off inductive loads voltage...

Страница 12: ... the level electrode the amber LED C must light up malfunction in connecting line 5 After bridging the terminals C16 and C18 the amber LED D must light up malfunction in equipment The measuring voltages for the operating conditions are listed in table 1 Performance test Table 1 Measuring voltage UM Decoding 1 V Malfunction in electrode supply cable short circuit or interruption 1 V 4 V Electrode e...

Страница 13: ...luminated Fault The safety screw of the level electrode has not been removed Remedy Remove safety screw Remedy Level electrode insulation stuffing box defective Remedy Measure measuring voltage across C 18 A 18 Replace level electrode if measuring voltage 9 V LED Malfunction in connecting line illuminated Fault Electrode supply line defective short circuited or interrupted Remedy Check electrode s...

Страница 14: ...n 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 ...

Страница 15: ...15 For your notes ...

Страница 16: ...8455 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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