Translation of original instructions

EB 8379 EN

Edition June 2018

Type 3770 Ex d/Ex i Field BarrierII 2G Ex d[ia] IIC T6 Gb

Note on these mounting and operating instructions

These mounting and operating instructions assist you in mounting and operating the device safely. The instructions are binding for handling SAMSON devices.

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 (aftersalesservice@samson.de).

The mounting and operating instructions for the devices are included in the scope of delivery. The latest documentation is available on our website at www.samson.de > Service & Support > Downloads > Documentation.

Definition of signal words

Hazardous situations which, if not avoided, will result in death or serious injury

Hazardous situations which, if not avoided, could result in death or serious injury

Property damage message or malfunction

Additional information

Recommended action

DANGER!

WARNING!

NOTICE!

Note

Tip

2 EB 8379 EN

Contents

EB 8379 EN 3

1 General safety instructions .............................................................................52 Design and principle of operation ..................................................................62.1 Versions ........................................................................................................92.2 Explosionprotectioncertificates .......................................................................92.3 Technical data .............................................................................................103 Mounting on positioners ..............................................................................114 Electrical connection ....................................................................................124.1 Connection to comply with type of protection .................................................124.1.1 ConnectionwithtypeofprotectionEx daccordingtoEN 60079-1 ..................124.1.2 ConnectionwithtypeofprotectionEx eaccordingtoEN 60079-7...................134.2 Wiring ........................................................................................................145 Servicing explosion-protected devices ..........................................................16

4 EB 8379 EN

EB 8379 EN 5

General safety instructions

1 General safety instructionsFor 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. According to these mounting and operating instructions, trained personnel refers to individuals who are able to judge the work they are assigned to and recognize possible dangers due to their specialized training, their knowledge and experience as well as their knowledge of the applicable standards.Explosion-protected versions of this device are to be operated only by personnel who has undergone special training or instructions or who is authorized to work on explosion-protected devices in hazardous areas.

To avoid damage to any equipment, the following also applies:Proper shipping and storage are assumed.

Devices with a CE marking fulfill the requirements of the Directives 2004/108/EC and 2006/95/EC. The Declaration of Conformity is available on request.

Note

6 EB 8379 EN

Design and principle of operation

An M20x1.5 adapter allows for a direct connection through the cable entry of the fielddevices.Channel1ofthefieldbarrierisespeciallydesigned for transmitting analog signals in therangeof4to20 mA,butitalsotransmitsthe HART® protocol.Channels 2 and 3 are intended for con-trolling limit contacts according to IEC 60947-5-6orEx isolenoidvalves(e.g.Type 3767Positionerwithasolenoidvalvecoilfor6 V).

Switching amplifierWheninterconnectingthefieldbarrierwithmulti-channelswitchingamplifiers,itisimportant to make sure that the different channelsintheswitchingamplifierdonotoperate on a common potential. Otherwise unwanted interaction of the limit contacts could occur.

In case of doubt, only use single-channel switching amplifiers.

Note

2 Design and principle of oper-ation

Thefieldbarrierissuitableforoperatingpo-sitioners, smart positioners with HART® com-munication, i/p converters, solenoid valves or limit switches.Devices with HART® communication need an adaptation, which is available e.g. with Type 3730-3andType 3730-6Positioners.Upstream connection and direct attachment tointrinsicallysafefielddevicesenabletheintrinsically safe circuits of these devices to be connected with the circuits of upstream in-put and output units that are not intrinsically safe.In this way, the advantages of intrinsic safe-ty, such as commissioning and operation when connected to a voltage source, remain in effect within the hazardous area.The connecting cable of the non-intrinsically safe circuit is introduced into the enclosure of thefieldbarriereitheroveraconduitsystemordesign-certifiedmetalcableentry.Thefieldbarriertransmitstheanalogrefer-ence variable to i/p converters and position-ers. The use of HART® protocol is also possi-ble.Thefieldbarriersmustbeconnectedtotheequipotential bonding system. For this pur-pose, a version with minus-sided equipoten-tialbonding(non-floating)andafloatingversion are available. The version is selected to match the earth of the analog output of the controller or control system.

EB 8379 EN 7

Design and principle of operation

Equipotential bonding systemThe individual current circuits of the Type 3770Ex d/Ex iFieldBarrierareelec-trically connected with internal and external equipotential bonding terminals.The connection between the external equipo-tential bonding terminal and the local equi-potential bonding system must be as short as possible.Channels 2 and 3 are set up to be barriers for positive potential.Channel1canbesetuptobefloating(Fig. 1,left)orforpositivepotential(Fig. 1,right).Seesection 4.2fordetailsonhowtoconnectintrinsically safe circuits on the output side.

2

1

4

3

6

5

CH1

CH2

+

_

+

_

+

_

2

1

4

3

6

5

CH3

Ex ia

Ex ia

Ex ia

CH1

CH2

+

_

+

_

+

_

CH3

Ex ia

Ex ia

Ex ia

Equipotential bonding terminal

Equipotential bonding terminal

Fig. 1: Type 3770-1310 (left), Channel 1 floating Type 3770-1410 (right), Channel 1 non-floating

8 EB 8379 EN

Design and principle of operation

PA

PA

II

II

Non Ex (i)

Non Ex (i)

Non Ex (i)

Non Ex (i)

Ex (i)Ex ifieldunit

Ex ifieldunit

Ex d enclosure

Ex d enclosure

Analog control signal

Analog control signal

Binarysignal

Binarysignal

Ex i

Ex i

Ex i

Safe area Hazardous area

Fig. 2: Examples of connections with SAMSON positioners

EB 8379 EN 9

Design and principle of operation

2.1 VersionsField barrier acc. to ATEX Type 3770- 1 x x x 0 x x x

Three channels:4to20 mA,floatingandtwocircuitsaccordingtoEN 60947-5-6 3

Three channels:4to20 mA,non-floatingandtwocircuitsaccordingtoEN 60947-5-6 4

Electrical connections

½ NPTfemalethread(aluminum) 1 0

M20x1.5 female thread (stainless steel) 3 1

Enclosure material

Die-cast aluminum 0

Stainless steel (AISI 316) 1

Special version

Without 0 0 0

GOSTcertificate 0 0 1

2.2 Explosion protection certificatesType Certification Type of protection

3770

Number RUC-DE.GB08.B.006871Ex d[ia] IIC T6 Gb XDate 2014-12-09

Valid until 2019-12-08

3770-1EC type examination certificate

Number PTB98ATEX1025XII2GExd[ia]IICT6GB

Date 2004-01-14

10 EB 8379 EN

Design and principle of operation

2.3 Technical dataConnection Channel 1: Ch 1 +/– Channel 2 and 3: Ch 2 +/–

and Ch 3 +/–

Operating values 0/4to20 mAorUN to 15 V DC

0/4to20 mAorUN to 10 V DC

orlimitcontactsacc.toEN 60947-5-6notsuitablefortransmitter supply

Input Um=250 V

Fuse rating lN=80 mA(slow-acting)

Output circuit Ex iaIIC

Maximum values according toECtypeexaminationcertificate

Max. output voltage U0 ≤17.2 V ≤12.6 V

Max. output current I0 ≤110 mA ≤49 mA

Max. power P0 ≤473 mW ≤154 mW

Max. perm. capacitance C0 360 nF/IIC·2.1 µF/IIB 1.15 µF/IIC·7.4 µF/IIB

Max. perm. inductance i L0 3 mH/IIC·12 mH/IIB 15 mH/IIC·56 mH/IIB

Series resistance RLmax 190 Ω 285 Ω

Load impedance 3.8 V/20 mA 5.7 V/20 mA

Perm. ambient temperature –45 °C≤ta≤+60 °CT6

Degree of protection IP 65accordingtoDIN EN 60529

Enclosure material Die-cast aluminum, painted or stainless steel (AISI 316)

EB 8379 EN 11

Mounting on positioners

3 Mounting on positioners1. Remove the cable entry at the side of the positioner or the screw plug from the positioner.2. Insertthefreecableendsandscrewinthefieldbarrier(M20x1.5thread).3. Turn the enclosure to face the direction you require and secure this position with coupling

nut.4. ConnectthefreecableendstotheterminalofthepositionerasshowninFig. 4.

130

Ø90

M20 x 1,5

½ NPT(aluminum) or M20x1.5 (stainless steel)

Fig. 3: Mounting on positioners

12 EB 8379 EN

Electrical connection

4 Electrical connection

Risk of electric shock!For electrical installation, observe the rele-vant electrotechnical regulations and the ac-cident prevention regulations that apply in the country of use.Valid regulations in Germany: − VDE regulations − Accident prevention regulations of the em-ployers’ liability insurance.

Risk of fatal injury due to the formation of an explosive atmosphere.For installation in hazardous areas, observe the relevant standards that apply in the country of use.Valid standards in Germany: − EN 60079-14: 2008 (VDE 0165, Part 1) Explosive Atmospheres – Electrical Installa-tions Design, Selection and Erection.

Additional points that apply: Î Only use cable entries and blanking plugs with the same degree of protection (IPgrade)asthatofthefieldbarrier.

4.1 Connection to comply with type of protection

Incorrect electrical connection will render the explosion protection unsafe. − Adhere to the terminal assignment. − Do not undo the enameled screws in or on the housing. − Do not exceed the maximum permissible values (U0, I0, P0, C0 and L0) specified in the EC type examination certificates when interconnecting intrinsically safe electrical equipment.

4.1.1 Connection with type of protection Ex d ac-cording to EN 60079-1

Î ConnecttheType 3770-1FieldBarrierusing suitable cable entries or conduit systemsthatcomplywithEN 60079-1Explosive Atmospheres – Part 1: Equip-ment Protection by Flameproof Enclo-sures "d", Clauses 13.1 and 13.2 and forwhichaseparatetestcertificateisavailable.

Î Do not use cable entries and blanking plugs of simple construction.

Î For installation according to the type of protectionEx db,sealcableentriesleftunusedwithplugscertifiedforthispur-pose.

DANGER!

DANGER!

WARNING!

EB 8379 EN 13

Electrical connection

Î Install the connecting cable properly so that it is protected against mechanical damage.

Î If the temperature at the inlet parts ex-ceeds70 °C,useatemperature-resistantconnecting cable.

Î Includethefieldbarrierintheon-siteequipotential bonding system.

4.1.2 Connection with type of protection Ex e ac-cording to EN 60079-7

Î Use cable entries and blanking plugs that arecertifiedaccordingtotypeofprotec-tionEx eandpossessaseparatetestcer-tificate.

Î Use metal cable glands for ambient tem-peraturesbelow–20 °C.

Î Only connect two cables with different cross-sections to one terminal after they have been secured with a common crimp sleeve.

14 EB 8379 EN

Electrical connection

4.2 Wiring

The terminals are designed for 0.5 to 2.5 mm² wires.

Î Guidethefreewiringendsofthefieldbarrier from Ch1 or Ch2 and Ch3 (chan-nel 1, 2 and 3) to their assigned termi-nalsinthepositioner(Fig. 4andFig. 5).

Î Use the yellow/green cable to connect the equipotential bonding terminal of the

fieldbarriertotheequipotentialbondingterminal of the device to be connected.

Î Insulate free wire ends of unused chan-nels.

Î Insert the connecting cable of the non-in-trinsically safe circuit into the enclosure ofthefieldbarriereitheroveraconduitsystemoradesign-certifiedmetalcableentry.

Î Connect the individual wires to the termi-nals marked Ch1 or Ch2 and Ch3 (chan-nel 1, 2 and 3) in the enclosure of the fieldbarrier.

Note

PA _ +

Ch1

1 2 3 4 5 6

_ +

Ch2_ +

Ch3

EiA/

OutputwithmarkedEx icableends

Switchingamplifieracc.toEN 60947-5-6(singlechannel, if applicable) for limit contact or activation forsolenoidvalveupto10 Voranalogsignal0/4to20 mA,notsuitablefortwo-wiretransmittersupply

Ex dterminalcompartment

4to20 mAcontrol signal

Green/yellow

Fig. 4: Terminals

EB 8379 EN 15

Electrical connection

EiA/

EiA/

Ep

Ch121

43

65

21

43

65

21

43

65

+_

+11

–12

Ch2+_

+41

–42

+51

–52

+81

–82

Ch3+_

+41

–42

+51

–52

+81

–82

_10V

_10V<

_10V<

_10V<

<

_10V

GW2GW1

GW2GW1

Ch2+_

+41

–42

Ch1+_

+11

–12

+51

–52

+81

–82

+83

–84

GW2GW1<

_10V

Ch3+_

+41

–42

+51

–52

Ch2+_

+41 1

2

–42

Ch1+_

+81

–82

41

42

Ch3+_

+51

–52

52

53

+81

–82

+83

–84

GW2GW1<

EiA/

21

43

65

Ch2+_

+41

–42

Ch1+_

+11

–12

+83

–84

A1

Ch3+_

+51

–52

+83

–84

A2A3

A3

_15V<

Field barrier mounted on Type 3767 Positioner

or

or

or

or

or

or

or

or

or

or

or

or

or

or

Field barrier mounted on Types 3730-1/-2/-3/-6 Positioners

Field barrier mounted on Type 3780 Positioner

Field barrier mounted on SAMSOMATIC Type 3776 Limit Switch

Fig. 5: Connection examples

16 EB 8379 EN

Servicing explosion-protected devices

5 Servicing explosion-protected devices Î DonotrepairtheType 3770-1FieldBar-rier when it has been activated (intrinsi-cally safe current circuit has been switched off).In this case, contact SAMSON's After-sales Service department:u aftersalesservice@samson.de

EB 8379 EN 17

18 EB 8379 EN

EB 8379 EN 19

2018

-10-16·English

SAMSON AKTIENGESELLSCHAFTWeismüllerstraße 3 · 60314 Frankfurt am Main, GermanyPhone: +49 69 4009-0 · Fax: +49 69 4009-1507samson@samson.de · www.samson.de

EB 8379 EN