Mounting and Operating Instructions EB 6126 EN
Contents
1. 000 B 6126 EN Only with output 0 2 to 1 bar 3 to 15 psi 2 Description Without switch off electronic function and without zero point and span correction not possible with Type 6109 i p module output 0 2 to 1 bar 3 to 15 psi 3 4 Input O to 5 V possible as special version Accessories Mounting accessories for Mounting bracket for wall mounting Specify setting range e g set to 0 1 to 4 bar output pressure max 5 bar supply air 5 4 bar Raised zero up to 3 bar 45 psi possible as special version Order no 1400 7432 stainless steel 1 4301 included in the scope of delivery Wall and pipe mounting 2 pipes Attachment to cast yokes acc to NAMUR Attachment to valves with rod type yokes according to NAMUR Pressure gauges for retrofitting Pressure gauge 0 to 1 2 bar range Pressure gauge to 6 bar range Pressure gauge 0 to 10 bar range For all pressure gauges Screw fitting Male connector 14 onto 4x1 mm hose brass Male connector 4 NPT onto 4x1 mm hose brass T piece screw fitting for 4 1 mm hose brass 1 Description 1 1 Application The devices are used to convert a direct cur rent input signal into a pneumatic signal for measuring and control They are especially suitable as intermediate elements between electrical measuring devices and pneumatic controllers or between electrical control devi ces and pneumatic contr2. p 7 N SUPPLY 8 GAUGE 36 posa 22 5 Fig 2 Functional diagram 6126 7 Installation Switch off electronic function Devices with an input range of 4 20 mA have a slide switch which activates the switch off electronic function This function causes the input signal to be set to mA when the switch point falls below a 4 08 tolerance This function causes the pneu matic output to be vented up to approx 100 mbar ensuring for example the tight shut off of a control valve The function re quires a characteristic which passes through zero as is the case for example for an out put signal from 0 2 to 1 bar If the characteristic line does not pass through zero like for example for an allo cated output signal from 0 8 to 2 7 bar then the pneumatic output is vented to a remaining pressure of approx 0 3 bar when the switch off electronic function is ac tivated bar 1 0 With an output of 0 2 to 0 6 1 bar 0 4 Approx 0 1 bar remaining pressure 0 21 With an output of 0 8 to 2 7 bar Approx 0 3 bar remaining A 8 12 16 20 Fig 3 Switch off electronic function and remaining pressure 8 B 6126 EN 2 Installation 2 1 Mounting The converter can be mounted to a wall a pipe or directly to a control valve as illus trated on page 14 The device is delivered with a stainless steel bracket for wall mounting
3. The following mounting accessories are required depending on the type of mounting to be used Pipe mounting order no 1400 6216 Attachment to valve with cast yoke order no 1400 6217 Attachment to valve with rod type yoke order no 1400 6218 Mounting position Mount the device horizontally with the pres sure gauge or stopper plug pointing up wards If a different mounting position is used the zero point must be readjusted for the 4 to 20 mA version with the switch off electronic function For converters with a degree of protection IP 54 it is essential to direct the EXHAUST port downwards to face the floor 3 Connections 3 1 Electrical connection As far as the electrical installation of the device is concerned the relevant national regulations governing the installation of electrical equipment and the national accident prevention regulations of the country of destination must be adhered to In Germany these are the VDE regulations and accident prevention regulations of the employer s liability insurance Connections A male angle connector conforming to DIN EN 175301 803 A is used for electrical connection 1 Unscrew the fixing screw 1 of the con nector plug and pull the plug insert 3 out of the plug base at the enclosure 2 Pull the screw out of the plug and remove the seal 5 3 Place a screwdriver at the recess 4 and lever the plug insert 3 out of the plug housing
4. 4 Run the wires for the input signal over the cable gland of the plug housing to the terminals of the insert marked 1 2 and screw them down Fixing screw 1 2 Connector plug housing 3 Plug insert 4 Recess 5 Seal 6 4 Cable gland Fig 4 Terminal assignment on the plug connector 1 L 24 V DC only for O 2 10 V 4 0 20 mA 0 2 10 V 6126 9 Operation For voltage to pressure converters additionally run the wire for the auxil iary power 24 V DC to terminal 3 Current to pressure converters do require a supply voltage 5 Push the insert into the plug housing making sure that the cable gland points in the correct direction after the connec tor plug has been reassembled the plug housing can be mounted in all four di rections turned at 90 angles around the insert 6 Plug the connector plug on the device and screw tight the screw 1 3 2 Pneumatic connection The connections for supply air SUPPLY 8 and output air OUTPUT 36 are designed as bores with G 4 or 14 18 NPT thread see page 14 Note Customary male connectors for metal pipes or plastic hoses can be used When extend ing the exhaust by connecting a pipe either to the exhaust angle piece or directly to the G or NPT connection make sure that no wa ter can enter at the end of the pipe The pipe must have a sufficiently large cross section area of at least 28 mm 6
5. Electropneumatic Converters Current to Pressure Converter Type 6126 Voltage to Pressure Converter Type 6126 Fig 1 Type 6126 Current to Pressure Converter with pressure gauge and bracket Mounting and Operating Instructions EB 6126 EN Edition July 2010 Contents Contents NO GO B WWW NN NO 2 EB 6126 EN Page Description ADBCdlO e 74 Hs 799 3x9939 49 9254 93 5 Technical data 2 a a a 6 Principle 7 8 E S lt ow 1 8 Connections 9 Electrical 9 Pneumatic connection 2 080802 ee eee eas 10 Operation 2s wo X wow bw eee oe u REDE eom OUR ms 10 Maintenance a n 12 Troubleshooting 13 Dimensions in mm 2 2 eee ee eee 14 Safety instructions The devices may only be mounted started up or serviced by fully trained and qualified personnel observing the accepted industry codes and practices Make sure employees or third persons are not exposed to any danger All safety instructions and warnings in these mounting and operating instructions particularly those concerning assembly start up and maintenance must be observed Any hazards which could be caused in the device by the signal pressure are to be prevented by means of th
6. e appropriate measures Proper shipping and appropriate storage of the device are assumed The device with the CE marking fulfills the requirements of the Directive 94 9 EC and the Directive 89 336 EEC The declaration of conformity is available on request 6126 3 Article code Article code Explosion protection Without 0 Pneumatic connection 18 NPT ISO 228 1 G 14 i p module Type 6109 Type 6112 Input 4 to 20 mA to 20 mA without electronics 4 to 20 mA without electronics 10 V 24 V DC auxiliary power 2 to 10 V 24 V DC auxiliary power 2 OAR Co l2 Output 0 2 to 1 0 bar 3 to 15 psi 0 4 to 2 0 bar 6 to 30 psi Special ranges Initial value 0 1 to 0 4 bar span 0 75 to 1 00 bar Initial value 0 1 to 0 4 bar span 1 00 to 1 35 bar Initial value 0 1 to 0 4 bar span 1 35 to 1 81 bar Initial value 0 1 to 0 8 bar span 1 81 to 2 44 bar Initial value 0 1 to 0 8 bar span 2 44 to 3 28 bar Initial value 0 1 to 0 8 bar span 3 28 to 4 42 bar Initial value 0 1 to 1 2 bar span 4 42 to 5 94 bar 3 4 NA NHN NOOR WD O RD Operating direction Increasing increasing Increasing decreasing L Degree of protection IP 54 IP 65 Output pressure gauge Without With Temperature range Tmin 2 25 C Special version Without 6126 x x X X X X X X X X X X X
7. equest Deviation from terminal based conformity of final value more accurate specifications on request Influence in of final value Supply air 0 1 0 1 bar Alternating load supply air failure interruption of input current lt 0 3 Ambient temperature Lower measuring range value lt 0 03 K span lt 0 03 K Dynamic response IEC 770 Limiting frequency 5 3 Hz Phase shift 130 Effect of variable mounting position Max 3 5 1 when mounted horizontally with Type 6109 Max 1 25 1 when mounted horizontally with Type 6112 Ambient temperature 25 to 70 C Degree of protection IP 54 IP 65 Materials Enclosure Die cast aluminum chromated plastic coated glass fiber reinforced polyamide other parts made of corrosive resistant material Weight Approx 0 6 kg 1 Measured with 2 m hose 4 x 1 mm 2 Measured at average output pressure 6 EB6126 EN 1 3 Principle of operation The converter consists of an i p converter module and a connected volume booster The supplied direct current i flows through the plunger coil 2 located in the field of a permanent magnet 3 At the balance beam 1 the force of the plunger coil which is proportional to the current is balanced against the force of the dynamic back pres sure The back pressure is produced on the flapper plate 6 by the air jet leaving the nozzle 7 The air supply SUPPLY 8 flow
8. he SPAN potentiometer 7 Change the input signal abruptly from the upper range value 20 mA to mA or gently tap the device and check whether the output signal assumes the upper range value e g 1 0 bar Since the adjustments of zero point and span influence each other check both values again and correct them if necessary 8 For 4 to 20 mA versions reactivate the switch off electronic function if required at the switch 5 Note for voltage input signal For voltage to pressure converters proceed in the same way as already described The pneumatic output signal from for example 0 2 to 1 bar is assigned to the signal range O or 2 to 10 V with the ZERO and SPAN adjusters see nameplate Converters with voltage input do not have the switch off electronic function Operation Current to pressure converters 4 20 mA version Slide switch for switch off electronic function Voltage to pressure converters O 2 to 10 V version Fig 5 Adjusters with enclosure 6126 EN 11 Maintenance 5 Maintenance No particular maintenance steps are pre scribed Proper functioning of the converter can only be guaranteed when the instrument air ap plied to the device is always clean The air filter and separator of the pressure reducing station should be checked at regular inter vals The pneumatic connections have filters with plastic rims order no 0550 0213 which can be unscre
9. ions in mm bracket 1400 7432 74 5 Wall mounting with mounting Mounting on a control valve with accessories 1400 6217 1400 6216 136 120 100 Mounting bracket U EXHAUST IP 65 Attachment to valve with cast yoke Attachment to valve with rod type yoke 1400 6218 Pressure gauge accessories 7 p 6 il 2 IQ Electrical connection N 75 5 Wall and pipe mounting EXHAUST 126 14 EB 6126 EN 6126 15 SAMSON AG MESS UND REGELTECHNIK Weism llerstraBe 3 60314 Frankfurt am Main Germany Phone 49 69 4009 0 Fax 49 69 4009 1507 Internet http www samson de EB 6126 EN S Z 2011 11
10. mm inside di ameter 10 EB6126 EN 4 Operation The device converts the input signal propor tionally into the output signal The signal ranges are specified on the nameplate In case of a mounting position that is not horizontal or when the pressure gauge stopper plug does not face upwards zero and span can be corrected by approx 10 using the electronics To do this pro ceed as follows Example The output signal 0 2 to 1 bar is to be as signed an input signal of 4 to 20 mA 1 Unscrew the enclosure cover to access the ZERO and SPAN potentiometers on the printed circuit board Zero 2 Connect a pressure gauge minimum ac curacy class 1 to the output of the de vice 3 Set the supply air to at least 0 4 bar above the upper range value of the out put signal and apply it to the device A Deactivate the switch off electronic func tion at the switch 5 for 4 to 20 mA ver sion 5 Set the input signal to the lower range value 4 mA using a suitable current source The output signal at the test pres sure gauge should indicate a lower range value of 0 2 bar Should another value be indicated read just the zero point accordingly with the ZERO potentiometer Span 6 Set the input signal to 20 mA using a suitable current source The output signal at the test pressure gauge should indi cate the upper range value of 1 0 bar Should another value be indicated read just the span accordingly with t
11. ol valves 1400 6216 1400 6217 1400 6218 0080 0185 0080 0186 8520 0032 0250 1090 8582 1452 8582 1523 8582 1480 The input is a load dependent direct current from 4 or 20 mA or a DC voltage sig nal from 2 or O to 10 V with an auxiliary power of 24 V DC The output is for exam ple a pneumatic signal of 0 2 to 1 bar 3 to 15 psi or 0 4 to 2 bar 6 to 30 psi or spe cial ranges up to 5 bar 75 psi 6126 5 Description 1 2 Technical data Type 6126 0 Input 014 to 20 mA or 0 2 to 10 V input resistance 30 Load lt 6 V corresponds to 300 Q at 20 mA versions without electronics 200 Q at 20 mA lt 4 V Output 0 2 to 1 bar 3 to 15 psi with Types 6109 and 6112 i p modules 0 4 to 2 bar 6 to 30 psi with Type 6112 i p module Special ranges up to 5 bar 75 psi with Type 6112 i p module Air output capacity 2 0 m h at 0 6 bar output 0 2 to 1 bar 2 5 m h at 1 2 bar output 0 4 to 2 bar Auxiliary power Supply air Instrument air at least 0 4 bar above the upper signal pressure range value maximum 5 4 bar without upstream pressure regulator 2 Air consumption 0 08 h at 1 4 bar 0 1 mn h at 2 4 bar 24 V DC with voltage to pressure converter 10 to 28 V DC 9 to 25 mA max 30 for 0 2 to 10 V input Performance Hysteresis Characteristic Output linear to the input 0 3 of final value more accurate specifications on r
12. s into the lower diaphragm chamber during which a certain amount of air determined by the diaphragm position flows past the sleeve 9 to the output OUTPUT 36 When the in put current increases and as a result the Description forces at the plunger coil increase as well the flapper plate 6 moves closer to the noz zle 7 This causes the dynamic back pres sure and the cascade pressure pk forming in front of the restrictor 8 2 to increase The cascade pressure increases until it is equal to the input current When the cascade pres sure increases the diaphragm 10 and the sleeve 9 are pushed downwards causing the supply air to increase the output pres sure pA until a new state of equilibrium is reached in the diaphragm chambers When the cascade pressure drops the diaphragm moves upwards releasing the sleeve and al lowing the output pressure pA to pass through the sleeve to be vented EXHAUST port until the forces at the diaphragm are equal again 1 Balance beam 7 S 2 Plunger coil E 3 Permanent magnet 2 7 4 Zero and span adjusters notin 3 J version without electronics 5 Switch off electronic function Type 6109 Slide switch only in 4 to 20 mA Type 6112 version with electronics i Module 6 Flapper plate T 7 Nozzle 8 Volume booster LM BRA AAI AAA AAR 8 8 2 Fixed restrictor N 9 Sleeve N 10 Diaphragm EXHAUST e a 10 2 8 2 OUTPUT 36 4 2 f
13. wed and changed or cleaned 12 18 6126 EN 6 Troubleshooting Problem Possible cause Countermeasure Troubleshooting Comments No output signal despite changing the input signal Supply air not connected Incorrect terminal assignment Incorrect input signal Check supply air con nection see section 3 2 Connect and terminals correctly see section 3 Connect correct signal CAUTION Current to pressure con verter does not need any extra voltage Do not connect 24 V DC Voltage to pressure converter requires a 24 V DC voltage supply see section 3 1 See nameplate 0 20 mA or 4 20 mA 0 10 2 10 Converter constantly vents off air loudly Connections for supply air and output at the converter mixed up Check pneumatic connection see section 3 2 Converter does not reach 100 output e g 20 mA input Output only 70 instead of 100 Supply air is too low Supply air must be 0 4 bar greater than the max output signal supply air 0 4 bar See nameplate Output 0 2 1 bar gt Supply air at least 1 4 bar max 6 bar Input signal faulty Check whether the input signal at the terminals reaches 100 100 is in standard version e g 20 mA with split range 12 mA CAUTION Current to pressure con verter has a load of max 6 V Check specification concerning control 6126 13 Dimensions 7 Dimens
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