GP43, GP44, GP63, GP64 user manual
Contents
1. Pin connection GP43 44 GP43 44 63 64 Datum 31 01 2000 Art Nr 79804 Z Nr 8604015 And Stand 462 99 9 C I 1 2 1312 11 Output OOO transducer un 1 8 L ooojooo Trip cams Fig 6 Pin connection GP63 64 with Instrument transformer 7 Adjustment and alignment 7 1 General information Definition of the counting directions Fig 7 Definition of the counting directions For GP43 44 By direction of rotation i and turn the shaft in direction e up to the limit stop the value of the moving contact S and the start point Po value are 0 Ohm The value increases related to Po with clockwise rotation i By direction of rotation e and turn the shaft in direction i up to the limit stop the value of the moving contact S and the start point Po value are 0 Ohm The value increases related to Po with anti clockwise rotation e For GP63 64 the same as for GP43 44 but the current_ of the transducer starts at low values and increa ses towards the end point see also chapter 7 4 7 2 Potentiometer setting When correctly connected and switched on the unit displays the current actual value 7 3 Adjustment of the trip cams Ex works the trip cams are not fixed radially to the shaft Adjustment is made after installation Important information Do not touch the roller levers during trip cam adjustm2. gt SI KO User Information T GP43 44 63 64 Geared Potentiometer With Limit Switches GP44 64 ENGLISH 1 Safety information In order to carry out installation correctly we strongly recommend this documentis read very carefully This will ensure your own safety and the operating reliability of the device Your device has been quality controlled te sted and is ready for use Please respect all warnings and information which are marked either directly on the device or in this document Warranty can only be claimed for components supplied by SIKO GmbH If the system is used together with other products the warranty for the complete system is invalid e Repairs should be carried out only at our works If any information is missing or unclear please contact the SIKO sales staff 2 Identification Please check particular type of unit and type number from the identification plate Type num ber andthe corresponding execution are indica ted in the delivery documentation e g GP43 0023 type number type of unit 3 Summary description The geared potentiometers are of very robust design and compact size The gear mechanism potentiometer combina tion adapts the mechanical rotating angle of the 1 or 10 turn potentiometer to the measuring range A slipping clutch between the gear me chanism and the potentiometer prevents irrepa rable mechanical damage to the potentiometer ift
3. to potentiometer values of 0 to 15 of the total range Trimmpotentiometer s Pe is used to adjust a current of 20 mA to potentiometer values of 90 to 100 of the total range The smallest available potentiometer range in which 4 to 20 mA are delivered is hence 15 to 90 of the potentiometer s resistance range Alignment 1 Move axis to start position 2 Turn left potentiometer Po until start value 4mA is measured 3 Move axis to end position 4 Turn right potentiometer Pe until end value 20mA is measured The steps 1 to 4 are to be repeated until the values are counterbalanced Current 20mA Pe 4mA Po 0 Distance Fig 10 Alignment 7 5 Whattodo if Instrument transformer the counting direction is wrong You can either mechanically change the counting di rection by ordering modifiying the counting direction at SIKO orby inverted interpretation of the 4 to 20 mA current 4 mA would then correspond to the end position can be achieved via software pro gramming if the instrument transformer s start end value cannot be set to 4 20 mA the potentiometer s setting range is perhaps to small check whether you can do with a smaller current range otherwise adjust the gear s input ratio accordingly by ordering changing the counting direction at SIKO What to do if Potentiometer an undefined value is displayed Carry out re ali
4. 4 mm max 0 5 mm Wiring to screen and to ground OV must be viaa good earth point having a large surface area for minimum impedance The unit should be positioned well away from cables with interference if necessary a protec tive screen or metal housing must be provi ded The running of wiring parallel to the mains supply should be avoided Contactor coils must be linked with spark suppression Supply voltage of the instrument transformer Operating voltage depends on execution and is indicated in the delivery documentation or onthe identification plate 20 28 VDC 6 1 How to open and close the device For opening Toopenthe unit remove fastening screws on the GP44 64 s cap on GP43 63 s back wall Ensurethatthe sealing is not damaged or lost For closing To easily close the unit and to avoid cable damage we recommend securing the inner strands with an adhesive tape The adhesive tape should be insensitive to temperature and ageing only GP44 64 Ensure that the sealing lies correctly in the groove Putthe cap back wall onto the flange Do not damage the sealing Tighten the fastening screws GP43 44 63 64 Datum 31 01 2000 Art Nr 79804 Z Nr 8604015 And Stand 462 99 Adhesive tape Fig 1 Fixation of ferrules 6 2 Cableconnection Prepare wire accord to fig 2 Open the device see chapter 6 1 and uns crew the P
5. 5 Installation The unit should be used only according to the protection level provided Protect the unit if necessary against environmental influences such as sprayed water dust knocks extreme temperatures Mounting of the encoder Use the frontal bores to fix the encoder Mount encoder without force Forces must not be transmitted via the hou sing but only via the shaft Do not exceed the values for the maximum axial and radial shaft load Ensure accurate shaft alignment If shaft and flange are not correctly aligned strain on the bearings will result which will overheat and be irreparably damaged 6 Electrical connection Switch power off before any plug is inser ted or removed e Wiring must only be carried out with power off e Provide standed wires with ferrules e Check all lines and connections before swit ching on the equipment Interference and distortion Allconnections are protected against the effects of interference The location should be selec ted to ensure that no capacitive or inductive interferences can affect the encoder or the connection lines Suitable wiring layout and choice of cable can minimise the effects of interference eg interference caused by swit ching power supplies motors cyclic controls and contactors Necessary steps Only screened cable should be used Screen should be connected to earth at both ends Wire cross section is to be at least 0 1
6. G screws Potentiometer transducer Cam switch 150 GP43 63 j 12 4 Ferrule 1 T Shrink sleeve Wire cross section 2x0 25mm or 3x0 25mm max 7x0 5mm number of cams x 2 1 250 GP44 64 Zi Ferrule Shrink sleeve Fig 2 Cable preparation With PG7 fig 3 Push the nut 1 and the plastic bushing 2 onto the cable Put the wire screening 3 over the plastic bushing 2 Slide strands through screw hole 4 Insert plastic bushing 2 into the screw fitting Fixnut 1 and then fix the complete PG screw to the casing w W m lt RO BUT Fig 3 Cable connection PG7 With PG9 fig 4 Push nut gasket 1 washer 2 inner o gt washer s inner 4 and washer 4 onto the cable Put the wire screening 3 over the washer s 2 outer surface Push strands through the screw hole 5 Insert parts 4 3 and 2 into the screw hole 5 Fixnut 1 andthen fix the complete PG screw to the casing O Fig 4 Cable connection PG9 Connect strands to the clip terminals fig 5 and 6 Close the geared potentiometer see chapter 6 1 FASS Jop gt Potentiometer Lolo 7 slO cs ke lolo Lalo Trip cams oojoo 12310 Ss ns 9 A Fig 5
7. ent damage from bending may result Bring the turnable trip cams A B C into a position which is favorable for fine adjustment grub screw 1 and screw 2 must be easily accessible Fix the grub screws 1 to prevent straining of the trip cams The setting screw 2 is used for precise setting of the trip cam use a screw driver size 3 see fig 8 ry fy Hexagon S z socket 1 5 VE ff a YU 1 B B 2 cust I E gt Screw driver 3 en 3 Fig 8 Trip cam adjustment A 2 AC DC ohmic 2 DC inductive 02 30 125 v 20 Fig 9 Nomogram Load rating cam switches 7 4 Alignment of the instrument transfor mer only for GP63 64 The unit GP63 64 comprises a resistance cur rent converter The potentiometer s resistance is converted into a current of 4 20mA twin m SIKO 10 GP43 44 63 64 Datum 31 01 2000 Art Nr 79804 Z Nr 8604015 nd Stand 462 99 core cable The measuring current is also used for feeding the instrument transformer The instrument transformer is preset to stan dard values 4mA for potentiometer s start posi tion Po and 20mA for end position Pe Via two trimmpotentiometer sPoandPe seefig 6 these values can be adjusted to the application s actual start and end position Alignment Trimmpotentiometer s Po is used to adjust a current of 4 mA
8. gnment or precise alignment Undefined values can be caused by cable breaks 8 Starting Please ensure that the instructions given in chapter 5 and6 regarding mechanical and elec trical connection are followed This will ensure correctinstallation and the operating reliability of the device Before starting check again correct polarity of the supply voltage correct cable connection correct mounting of the device GP43 44 63 64 Datum 31 01 2000 Art Nr 79804 Z Nr 8604015 And Stand 462 99 1 Sli KO Postanschrift Postal address GmbH Postfach 1106 DR ING G WANDRES D 79195Kirchzarten Werk Factory Weihermattenweg 2 D 79256 Buchenbach Telefon Phone 07661 394 0 Telefax Fax 0 76 61 3 94 388 Internet www siko de SIKO 12 GP43 44 63 64 Datum 31 01 2000 Art Nr 79804 Z Nr 8604015 And Stand 462 99
9. he end stop is overtravelled only valid for 10 turn potentiometer 1 turn potentiometers do not have an end stop The geared potentiometers GP63 64 is equip ped with an R I transformer The resistance values relating to the potentiometer position are converted into a loop current in the range 4 to 20 mA This allows ameasuring value transmis sion independently from the transmission line s resistance Max 3 trip control 3 switching actions 4 Warranty information Please handle the encoder carefully as it is a high precision device Especially do not disassemble or open the encoder unless stipulated in this brochure link encoder s shaft with rigid couplings as this would expose the encoder s shaft bearing to high forces For solid shaft encoders we recom mend the use of SIKO flexible shaft coupling type AK18 knockthe housing and the shaft because this will damage the encoder or internal parts machine bore mill flange or shaft This could lead to severe damage inside the encoder exceed the values for the maximum axial and radial shaft load mount the encoder incorrectly Otherwise manufacturer s warranty will be inva lidated GP43 44 63 64 Datum 31 01 2000 Art Nr 79804 Z Nr 8604015 And Stand 462 99 7 ID NEVER
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