Samson 4746 Mounting And Operating Instructions
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Samson 4746 Mounting And Operating Instructions

Samson 4746 Mounting And Operating Instructions

Electric or pneumatic limit switch
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Type 4746
Electric or Pneumatic Limit Switch
Mounting and
Operating Instructions
EB 8365 EN
Edition October 2013
Table of Contents
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Summary of Contents for Samson 4746

  • Page 1 Type 4746 Electric or Pneumatic Limit Switch Mounting and Operating Instructions EB 8365 EN Edition October 2013...
  • Page 2 Î For the safe and proper use of these instructions, read them carefully and keep them for later reference. Î If you have any questions about these instructions, contact SAMSON's After-sales Service department ([email protected]). The mounting and operating instructions for the devices are included in the scope of delivery.

  • Page 3: Table Of Contents

    Contents General safety instructions ................5 Design and principle of operation ..............6 Principle of operation ..................6 2.1.1 Type 4746-x Inductive Limit Switch ..............6 2.1.2 Type 4746-x3 Electric Limit Switch ..............6 2.1.3 Type 4746-04 Pneumatic Limit Switch ..............6 Article code and versions ................8 Technical data .....................10...

  • Page 5: General Safety Instructions

    General safety instructions 1 General safety instructions For your own safety, follow these instructions concerning the mounting, start up and opera- tion of the device: − The device is to be mounted, started up or operated only by trained and experienced personnel familiar with the product.

  • Page 6: Design And Principle Of Operation

    Design and principle of operation 2 Design and principle of oper- 2.1.2 Type 4746-x3 Electric ation Limit Switch The limit switches are attached to pneumatic In this version, the shaft (2) carries two control valves as well as to Type 4765 and switch cases (3) with adjustable cam disks Type 4763 Positioners.
  • Page 7 Design and principle of operation 1 1.1 Lever for valve travel 1.1 Pin Shaft Switch case 3.1 Adjustment screw 4.1 Metal tag Inductive limit switch 4.2 Cam disk Proximity switch Switch lever 6.1 Roller 1 1.1 6.2 Spring Electric switch Pneumatic switch 8.1 Nozzle (in switch) 8.2 Flapper (in switch)

  • Page 8: Article Code And Versions

    Pneumatic connections Without ISO 221/1-G -27 NPT Special versions Without NEPSI approval Ex ia, Type 4746-12 inductive NEPSI approval Ex nL, Type 4746-82 inductive GOST approval Ex ia, Type 4746-1... 1 2/3 KOSHA approval Ex ia 1 2/3 Type 4746-3200 only with FM approval...
  • Page 9 Design and principle of operation Compatibility with paint Without Free from substances that impair paint adhesion Limit switch (device index .06 or lower) Type 4746- Type Inductive, no explosion protection Inductive, Ex ib IIC T6 Electric Pneumatic Electrical connection/lever Without Cable gland, lever I (device index .04 or higher without lever)

  • Page 10: Technical Data

    Screw terminals for 0.2 to 2.5 mm² wire cross-section Degree of protection IP 65 Weight Approx. 0.7 kg Type 4746-x3 Electric Limit Switch · Specifications apply to silver and gold-plated contacts Switching element Electric limit switch: changeover/SPDT (single-pole/double-throw type) Permissible load AC voltage: 220 V, 6.9 A DC voltage: 220 V, 0.25 A ·...
  • Page 11 · Observe the limits specified in the EC-type examination certificate. Models manufactured until 2006 with SJ3,5-N proximity switch. Type 4746-1 with type of protection Ex ia (ATEX) Maximum values for connection to certified intrinsically safe circuits Limit Switch Type 4746-12...

  • Page 12: Accessories

    1991-2110 2.5 Summary of explosion protection approvals Type Certificate Type of protection Number No. 977 STCC 0Ex ia IIC T6X 4746 2Ex s II T6X Valid until 2017-10-01 Number RU C.DE.08.00744 Date 2015-01-27 1Ex ia IIC T6/T5/T4 Gb X Valid until...
  • Page 13 Design and principle of operation Type Certificate Type of protection Number PTB 98 ATEX 2114 Date 2003-03-07 4746-1x II 2G Ex ia IIC T6 Gb EC type examination certificate Number 1607226 Ex ia IIC T6; Class I, Zone 0; 4746-3 Class I,II, Div.1, Groups A,B,C,D,E,F,G;...

  • Page 14: Attachment To The Valve

    Attachment to the valve 3 Attachment to the valve In the valve travel mid-position, move the support until the center of the plate (10) The accessories listed in section 2.4 are re- and the support (15) are aligned. quired for attachment. 4.
  • Page 15 Attachment to the valve 12 13 14 11 11.1 10.1 Attachment to valve with cast yoke (NAMUR rib) Lever 1.1 Clamping plate 12 13 1.2 Screw 1.3 Wire strap Shaft Plate 10.1 Screws 11.1 Nuts Screw Washer O-ring Support Rod clamping plate 11 11.1 10.1 Attachment to valve with rod-type yoke...

  • Page 16: Attachment To Type 3591 Valve

    Attachment to the valve 3.3 Attachment to Type 3591 oblong hole of the follower clamp (11) are in line with each other. Valve Î After attaching the limit switch, make Î Use the supplied washers for all screw sure that the vent plug of the housing connections.
  • Page 17 Attachment to the valve Round clamp Clamp Screws Limit switch Thread Anti-rotation fixture Mounting bracket 10 Screws 11 Follower clamp 12 Nut and bolt 13 Pin 14 Nut 15 Lever II 16 Clamp (for lever) 17 Nut 18 Lever extension Fig.

  • Page 18: Attachment To Positioner

    Attachment to the valve 3.4 Attachment to positioner Make sure that the short lever (1) slides over the pin (16) of the positioner. For attachment of the limit switch to the 4. Replace the vent plug (17) in the posi- Type 4763 or 4765 Positioner according to tioner housing with the screw plug in- Fig.

  • Page 19: Connections

    Connections 4 Connections Note on the selection of cables and  wires: 4.1 Electrical connection Observe clause 12 of EN 60079-14 (VDE 0165, Part 1) for installation of the intrinsically safe circuits. DANGER! Clause 12.2.2.7 applies when run- For electrical installation, observe the ning multi-core cables and wires with relevant electrotechnical regulations more than one intrinsically safe cir- and the accident prevention regula-...
  • Page 20 Connections Note concerning equipment for use  in zone 2: In equipment operated according to type of protection Ex nA II (non- sparking equipment) according to EN 60079-15:2003, circuits may be connected, interrupted or switched while energized only during installa- tion, maintenance or repair. Equipment connected to energy-lim- ited circuits with type of protection Ex nL (energy-limited equipment) ac-...

  • Page 21: Switching Amplifier For Type 4746-X2

    + and – as illustrated in Fig. 5 or ac- EN 60947-5-6 have to be connected in the cording to the adhesive label on the inside of output circuit (not for Type 4746-0281). the cover. Observe the relevant regulations for installa- The following accessories are available: tion in hazardous areas.

  • Page 22: Operation

    Operation 5 Operation 5.1.1 Type 4746-x2 Î Move the valve to the switching position 5.1 Adjusting the switching and turn the adjustment screw (3.1) until point the metal tag (4.1) reaches the switching point. The limit switches attached to control valves Î...

  • Page 23: Type 4746-X3 And Type 4746-04

    (e.g. plug in the seat) and the switch- fied above apply. ing point of the limit switch must be larger than the displacement of the 5.1.2 Type 4746-x3 and switching point caused by the tem- Type 4746-04 perature change. Î For adjustment, the cam disk (4.2) has to...

  • Page 24: Servicing Explosion-Protected Devices

    Servicing explosion-protected devices 6 Servicing explosion-protected 7 Maintenance and calibration devices Interconnection with intrinsically safe circuits to check or calibrate the equipment inside or If a part of the device on which the explosion outside hazardous areas is to be performed protection is based needs to be serviced, the only with intrinsically safe current/voltage device must not be put back into operation...

  • Page 25: Dimensions

    Dimensions 8 Dimensions Type 4746-x2 and Type 4746-x3 Type 4746-04 Air connection for separate air supply, Air connections, tapped hole G tapped hole G Intermediate piece for attachment to positioner M 20x1.5 Output Supply 20.6 Pneumatic connections Lever length L I/L II...

  • Page 26: Certificates

    Certificates 9 Certificates Note:  The type designations of the Types 4746-2 and 4746-3 Limit Switches have been changed. The certificates of conformity remain valid. See the following confirmation for details. EB 8365 EN...
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  • Page 40 SAMSON AG · MESS- UND REGELTECHNIK Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 EB 8365 EN [email protected] · www.samson.de...

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