Samson 3738-50 Service manual

Mounting and
Operating Instructions
EB 8390-5 EN
Firmware version A 1.01 / K 1.01
Edition August 2016
Type 3738-50 Electronic Limit Switch
with optional integrated solenoid valve
for valves used in on/off applications
FOUNDATION™ eldbus communication

Denition of signal words
DANGER!
Hazardous situations which, if not
avoided, will result in death or seri-
ous injury
WARNING!
Hazardous situations which, if not
avoided, could result in death or seri-
ous injury
NOTICE
Property damage message or mal-
function
Note:
Additional information
Tip:
Recommended action

2 EB 8390-5 EN

Contents
EB 8390-5 EN 3
1 Important safety instructions ..........................................................................6
2 Article code...................................................................................................7
3 Design and principle of operation ..................................................................8
3.1 Versions ........................................................................................................8
3.2 Communication using TROVIS-VIEW .............................................................10
3.3 FOUNDATION™eldbuscommunication......................................................10
3.3.1 FOUNDATION™eldbusblockmodel ..........................................................10
3.4 Safety-related information ............................................................................11
4 Technical data .............................................................................................12
4.1 Electronic limit switch ...................................................................................12
4.2 Solenoid valve .............................................................................................14
4.3 Forced venting option...................................................................................14
5 Attachment .................................................................................................15
5.1 Accessories .................................................................................................16
5.2 Attachment to linear actuators.......................................................................17
5.2.1 Preparations ................................................................................................17
5.2.2 Attachment..................................................................................................18
5.3 Attachment to rotary actuators ......................................................................20
5.3.1 Preparations ................................................................................................21
5.3.2 Attachment..................................................................................................22
6 Connections ................................................................................................26
6.1 Pneumatic connections..................................................................................26
6.2 Supply pressure ...........................................................................................27
6.3 Electrical connection.....................................................................................27
7 Operator controls and readings ...................................................................30
7.1 Rotarypushbutton........................................................................................30
7.2 SAMSON SSP interface................................................................................30
7.3 Local operation............................................................................................30
8 Start-up ......................................................................................................33
8.1 Adapting the display direction ......................................................................33
8.2 Verifying readings on display........................................................................33

4 EB 8390-5 EN
Contents
8.3 Determining the actuator type .......................................................................34
8.4 Determining the direction of action................................................................35
8.5 Adjusting the end positions...........................................................................35
8.6 Initialization ................................................................................................36
8.6.1 Start automatic initialization .........................................................................37
8.6.2 Start manual initialization.............................................................................37
8.7 Replacing an electronic limit switch................................................................39
8.8 Zero/endpositioncalibration .......................................................................39
8.9 Reset to default settings.................................................................................40
9 Operation...................................................................................................40
9.1 Lockoperation.............................................................................................40
9.1.1 LockingoperationoverFOUNDATION™eldbus...........................................40
9.1.2 Locklocaloperation .....................................................................................41
9.2 Partialstroketest(PST)..................................................................................41
9.2.1 DeningthePSTtargetrange........................................................................43
9.2.2 Startingthepartialstroketest........................................................................43
9.2.3 CongurationexamplebasedonPTOdirectionofaction ................................44
9.3 Testing the solenoid valve..............................................................................47
9.4 Fault ...........................................................................................................47
9.4.1 Status messages...........................................................................................47
9.4.2 Error messages ............................................................................................48
9.4.3 Conrmingstatusanderrormessages ...........................................................48
10 Maintenance, calibration and work on equipment ........................................48
10.1 Maintenance ...............................................................................................48
11 Servicing explosion-protected devices ..........................................................49
12 Firmware update (serial interface)................................................................49
13 Parameter list..............................................................................................50
13.1 Status messages...........................................................................................54
13.2 Error messages ............................................................................................56
14 Dimensions in mm.......................................................................................58
Assignment based on the direction of action .................................................................71

6 EB 8390-5 EN
Important safety instructions
1 Important safety instructions
For your own safety, follow these instructions concerning the mounting, start up and opera-
tion of the electronic limit switch:
−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 instruc-
tions,trainedpersonnelisreferredtoas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-pro-
tected devices in hazardous areas.
−Anyhazardsthatcouldbecausedbymovingpartsaretobepreventedbymeansofthe
appropriate measures.
−Forusewithinhazardousareas,theSpecialConditionsmentionedintheECtypeexami-
nationcerticateanditsaddendamustbeobserved.
−Ifinadmissiblemotionsorforcesareproducedinthepneumaticactuatorasaresultof
thesupplypressurelevel,itmustberestrictedusingasuitablesupplypressurereducing
station.
To avoid damage to any equipment, the following also applies:
−Proper shipping and storage are assumed.
−Do not ground electric welding equipment near to the electronic limit switch.
Note:
The device with a CE marking fullls the requirements of the Directive 2004/108/EC.


EB 8390-5 EN 7
Article code
2 Article code
Electronic Limit Switch Type 3738-50- xxxxx0 0 x1x0 0 x0
With LCD
Explosionprotection
Without 0 0 0
II2GExiaIICT6;II2DExiaIIICT80°CIP66 110
II2GExeb[ia]IICT4;II2DExtbIIICT80°CIP66 310
II3GExicIICT4;II3GExnAIIT4Gc;II3DExtcIIICT80°CIP66 810
Solenoid valve
External,bus-powered 0
Integrated,bus-powered 4
Options
Without 0
Forced venting 1
Company version
SAMSON 0
AIR TORQUE 1
Cover
Graybeige 0 0
Black 0 1
Silver gray 1 3
Special applications
Without 0
Versioncompatiblewithpaint 1
Special version
Without 0

8 EB 8390-5 EN
Design and principle of operation
3 Design and principle of oper-
ation
TheType3738-50ElectronicLimitSwitchal-
lowson/offvalvestobeactuatedbyaninte-
gratedorexternalsolenoidvalveaswellas
theirdiscreteendpositionstobereadoutby
a FOUNDATION™eldbusnetworkaccording
toIEC61158-2.
Major features of the electronic limit switch
include:
−PowersuppliedbyaFOUNDATION™eld-
busnetwork(solenoidvalvewithlowener-
gyconsumptionof6VDC)
−Simple discrete control of on/off valves
over a FOUNDATION™eldbusnetwork
−Integrateddiagnosticswithpartialstroke
testing(PST)
−Non-contact sensing of the rotation angle
byamagnetoresistivesensorsystem
−Version with integrated solenoid valve or
forexternalsolenoidvalve
Fig.1
The electronic limit switch is designed for at-
tachment to pneumatic actuators. The current
valve position is measured without contact
usingamagnet(onascrew)positionedcen-
trically on the actuator shaft. The screw with
magnetdoesnotneedtobeadjusted.The
AMR(anisotropicmagnetoresistive)sensor
located in the device together with the mea-
suringelectronics(1)candetectthedirec-
tionalchangeoftheappliedmagneticeld
and, as a result, sense the movement of the
actuator.
Thepneumaticactuatorisoperatedbyaso-
lenoidvalve(6,8)whichconvertsthesignal
issuedbytheprocesscontrolsystemintoa
binarypressuresignal.
3.1 Versions
Version with integrated solenoid valve
(Type 3738-50-xxx4x00x1x00x0)
The solenoid valve is integrated into the
housing of the electronic limit switch. The
electronic limit switch and the solenoid valve
arepoweredbytheconnectedFOUNDA-
TION™eldbustwo-wirecableaccordingto
IEC61158-2.
Theelectroniclimitswitchcanoptionallybe
ttedwithaforced venting function. This
function is activated when the solenoid valve
is de-energized after the power supply is in-
terrupted, causing the actuator to move the
control valve to its fail-safe position.
Version for external solenoid valve
(Type 3738-50-xxx0x00x1x00x0)
Theelectroniclimitswitchandtheexternal
solenoidvalvearepoweredbytheconnect-
ed FOUNDATION™eldbustwo-wirecable
accordingtoIEC61158-2.
Theelectroniclimitswitchcanoptionallybe
ttedwithaforced venting function. This
function is activated when the solenoid valve
is de-energized after the power supply is in-
terrupted, causing the actuator to move the
control valve to its fail-safe position.

EB 8390-5 EN 9
Design and principle of operation
T
SSP
interface
11 10
3FOUNDATION™
fieldbus
IEC 61158-2
2
5
8*
1
912
4
Signal for forced venting*
6
7
Electronic
limit switch
A
ctuator
1 AMR sensor with electronics
2 A/D converter
3 Microcontroller
4 Interfacemodule(IEC61158-2)
5 Actuation of forced venting
6 Solenoid valve
 (Type3738-50-xxx4x00x1x00x0)
 7 Aircapacitybooster
 (Type 3738-50-xxx4x00x1x00x0 )
 8*Externalsolenoidvalve
 (Type 3738-50-xxx0x00x1x00x0 )
9 Electrical isolation
10 Display
11 Rotarypushbutton
12 Temperature sensor
* Optional
Fig.1: Schematic diagram – Type 3738-50 Electronic Limit Switch

10 EB 8390-5 EN
Design and principle of operation
3.2 Communication using
TROVIS-VIEW
SeeTable2onpage16forordernum-
bers.
Theelectroniclimitswitchcanbecongured
withSAMSON'sTROVIS-VIEWCongura-
tion and Operator Interface. The electronic
limit switch has for this purpose a SAMSON
SSP interface to allow the RS-232 or USB
portofacomputertobeconnectedtoitover
aserialinterfaceadaptercable.
TheTROVIS-VIEWsoftwareenablestheuser
toeasilyconguretheelectroniclimitswitch
as well as view and document process pa-
rameters on a computer. See Data Sheet
uT6661.
3.3 FOUNDATION™ eldbus
communication
The electronic limit switch is controlled com-
pletelybydigitalsignaltransmissionaccord-
ing to FOUNDATION™eldbusspecication.
Dataaretransmittedoverthebususingdigi-
tal,bit-synchronousManchestercodingata
baudrateof31.25kbit/sovertwisted-pair
wiresaccordingtoIEC61158-2.
Note:
If complex functions are started in the
electronic limit switch, which require
a long calculation time or lead to a
large quantity of data being saved in
the volatile memory of the electronic
limit switch, the alert 'busy' is issued
over the DD. This alert is not an error
message and can be simply con-
rmed.
3.3.1 FOUNDATION™
eldbus block model
All the functions and data of the electronic
limitswitchareassignedtovariousblock
types in FOUNDATION™eldbus.Eachblock
typecoversadifferentrangeoftasks.Inthe
SAMSONType3738-50ElectronicLimit
Switch,thefollowingblocktypesareimple-
mented:
Resource Block (RES)
TheResourceBlock(RES)describescharac-
teristicsoftheeldbusdevice,suchasthe
devicename,manufacturernumberandse-
rialnumber.ThereisonlyoneResource
Blockinadevice.
Function Blocks (FB)
FunctionBlocksareresponsiblefortheway
aeldbusdeviceworks.Aeldbusapplica-
tioncanbeconguredbylinkingtheinput
andoutputparametersofFunctionBlocks.
The Type 3738-50 Electronic Limit Switch in-
cludesthefollowingFunctionBlocks:
5xDiscreteInputFunctionBlocks(DIFB);
executiontime:20ms
5xDiscreteOutputFunctionBlocks(DOFB);
executiontime:30ms
1xAnalogInputFunctionBlock(AIFB)
analogpositionfeedback;execution
time: 20 ms
