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2192-09063-000-000 j260 pcdac 12-4 PCDAC12-4 analogue output board technical manual product information full information about other arcom products is available via the f f a a x x - - o o n n - - d d e e m m a a n n d d s s y y s s t t e e m m , (telephone numbers are listed below), or by contacting our w w e e b b s s i i t t e e in the uk at: w w w w w w . . a a r r c c o o m m . . c c o o . . u u k k or in the us at: w w w w w w . . a a r r c c o o m m c c o o n n t t r r o o l l s s . . c c o o m m u u s s e e f f u u l l c c o o n n t t a a c c t t i i n n f f o o r r m m a a t t i i o o n n c c u u s s t t o o m m e e r r s s u u p p p p o o r r t t s s a a l l e e s s tel: +44 (0)1223 412 428 tel: +44 (0)1223 411 200 fax: +44 (0)1223 403 400 fax: +44 (0)1223 410 457 e-mail: support@arcom.co.uk e-mail sales@arcom.co.uk or for the us e-mail icpsales@arcomcontrols.com u u n n i i t t e e d d k k i i n n g g d d o o m m arcom control systems ltd clifton road cambridge cb1 4wh, uk tel: 01223 411 200 fax: 01223 410 457 fod: 01223 240 600 u u n n i i t t e e d d s s t t a a t t e e s s arcom control systems inc 13510 south oak street kansas city mo 64145 usa tel: 816 941 7025 fax: 816 941 0343 fod: 800 747 1097 f f r r a a n n c c e e arcom control systems centre d?affaires scaldy 23 rue colbert 7885 saint quentin cedex, france tel: 800 90 84 06 fax: 800 90 84 12 fod: 800 90 23 80 g g e e r r m m a a n n y y kostenlose infoline: tel: 0130 824 511 fax: 0130 824 512 fod: 0130 860 449 i i t t a a l l y y numeroverde: fod: 1678 73600 b b e e l l g g i i u u m m groen nummer: tel: 0800 7 3192 fax: 0800 7 3191 n n e e t t h h e e r r l l a a n n d d s s gratis 06 nummer: tel: 06022 11 36 fax: 06022 11 48 the choice of boards or systems is the responsibility of the buyer, and the use to which they are put cannot be the liability of arcom control systems ltd. however, arcom?s sales team is always available to assist you in making your decision. ? 1996 arcom control systems ltd arcom control systems is a subsidiary of fairey group plc. specifications are subject to change without notice and do not form part of any contract. all trademarks recognised. arcom control systems ltd operate a company-wide quality management system which has been certified by the british standards institution (bsi) as compliant with iso9001:1994
preface packing list this product is shipped as follows: l board l user manual l utility disk l pcbus library datasheet if any of the above appear to be missing, please telephone arcom 01223 411200. utility disk this product is shipped with a utility disk which contains: l pcbus library manual l source code for all pcbus i/o boards l test programs for calibration. handling this board contains cmos devices which could be damaged in the event of static electricity being discharged through them. at all times please observe anti-static precautions when handling the board and always unpack and install the board in an anti-static working area. please ensure that should a board need to be returned to arcom, it is adequately packed and if a battery is fitted, that it is isolated. manual pcb issue a issue b v1 iss 1b v1 iss 1b 960724 9801 16 [eco2684]. comments 2192-09063-000-000 j260 pcdac 12-4 page 2 revision history
2192-09063-000-000 j260 pcdac 12-4 page 3 preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 packaging list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 utility disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 handling (esd/packaging) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 reading or writing to the board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 setting a dac value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 i/o map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 i/o function registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 dac data registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 default link position diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 base address switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 board functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 user configuration record diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 installation for ce compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 circuit diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 contents
2192-09063-000-000 j260 pcdac 12-4 page 4
2192-09063-000-000 j260 pcdac 12-4 page 5 introduction the PCDAC12-4 is an 8-bit isa bus add-on board with four 12-bit digital to analogue converters (dac). voltage output ranges of 5v or 10v, and uni-polar or bi-polar operation may be selected by jumpers. the board also supports 4-20ma current outputs sourced from a regulated 15v supply. the d-50 i/o connector conforms to arcoms standard signal conditioning system (scs) and may be used to drive a range of signal conditioning boards (scb); see arcoms pcbus catalogue for more details. features ? ce compliant design ? four independent 12-bit dac channels ? voltage output ranges 5v, 10v or external. ? uni-polar or bi-polar outputs. ? high stability on-board references, 25ppm/ c. ? current loop outputs, 4-20ma, 15v sourced. ? compact i/o addressing scheme (link selectable base address) ? board access led ? user controlled indicator led ? 8-bit isa bus interface ? i/o connector conforms to arcom signal conditioning system (scs) ? operating temperature range +5 c to +55 c ? power required : +5v @ 200ma typical, +12v @ 200ma max. ? mtbf: 235,000 hours (using generic figures from mil-hdbk-217f at ground benign) getting started ? switch off pc ? install board in supplied configuration ? switch on pc ? run examp-01 (supplied on utility disk) ? an access led should flash. if not check default link configuration.
2192-09063-000-000 j260 pcdac 12-4 page 6 operation reading or w riting to the board control of the pco24 is achieved by writing to a pointer register and then accessing a data register to read or write the required i/o register. the pointer register need only be written with a new value if a different register is to be accessed. the board occupies only two bytes of pcbus i/o space. each time the board is accessed the red led will flash momentarily. setting a dac value the dac channel is first selected by writing to the pointer register. on this board, unlike other arcom isa boards, the value is then written to two dedicated data registers. the standard function data register at base+1 is not used when writing to the dacs. dac data is in binary for uni-polar operation and offset binary for bi-polar operation. special functions the PCDAC12-4 has two special function registers, user led and board identifier. after the pointer register is set, read/write data for either of these registers is addressed to base+1 i/o map a value written to the pointer register is used to select the function register, or dac channel next to be accessed. this board occupies four consecutive addresses and must be set to an address which is a multiple of 4. (e.g. 180h, 184h, 200h) i/o function registers address base write only read/write write only write only pointer register functions registers dac low byte dac high byte select dac or data register on-boarddata/control ls data to dac ms data to dac base + 1 base + 2 base + 3 read/write register name register function pointer value (hex) 0 write write write write write read dac 0 none none none none bit 0 only bit 0-7 dac 1 dac 2 dac 3 user led board identification select dac 0 for data write select dac 1 for data write select dac 2 for data write select dac 3 for data write 1 = green led on 0 = green led off always 29h for PCDAC12-4 01 02 03 80 81 read/write function register name data bit function
2192-09063-000-000 j260 pcdac 12-4 page 7 address base +2 dac low byte dac high byte bit 0-3 bit 4-7 bit 0-7 not used dac data bit 0-3 dac data bit 4-11 base + 3 register name data bit function dac data registers
2192-09063-000-000 j260 pcdac 12-4 page 8 links default link position diagram base address switches the three rotary switches adjust the base addresss of the board. a hexadecimal value for the address is shown directly in the dial windows. board functions lk1, lk2, lk3, lk4 these links select the range independently for each dac. lk1 operates with dac0, lk2 with dac1 etc. an external reference, or audio band ac signal must be connected to the corresponding input pin on the d50, when the c position is set. lk1..4a lk1..4b lk1..4c 5v output range 10v output range external range b a b a b a b a lk1 lk2 lk3 lk4 pl2 pl1 lk1 1 lk14 lk13 lk12 sw1 sw2 sw3 a b c a b c a b c a b c default link 1 8 0 +
2192-09063-000-000 j260 pcdac 12-4 page 9 lk11, lk12, lk13, lk14 these links select uni-polar or bi-polar operation for the corresponding dac channel. lk11 operates with dac0, lk12 with dac1 etc. current loop outputs to scale a current loop output correctly, the links must be set for the corresponding dac voltage output: user configuration record diagram lk1 1..14a lk1 1..14b uni-polar voltage output bi-polar voltage output lk1..4a lk1 1..14a 5v range uni-polar output + b a b a b a b a lk1 lk2 lk3 lk4 pl2 pl1 lk1 1 lk14 lk13 lk12 sw1 sw2 sw3 a b c a b c a b c a b c 1 8 0 link lk1 lk2 lk3 lk4 lk1 1 lk12 lk13 lk14 default user
2192-09063-000-000 j260 pcdac 12-4 page 10 calibration PCDAC12-4 is accurately calibrated before leaving the factory, however re-calibration will be required from time to time. there are six trimmers on the board which are intended for fine adjustments only. to calibrate the board, the test program, e.g. pcdac124.bas or demda124.c., should be used and measurements made with a 5digit dvm (or better). vr5, vr6 reference trim ? set one of lk1 to lk4 to the desired range. ? monitor the voltage at the link ref. analogue 0v. ? adjust the corresponding trimmer to give exactly 5v or 10v vr1, vr2, vr3, vr4 channel trim these trimmers adjust individual channels, vr1 for dac0, vr2 for dac1 etc. the effect at the output is to adjust full-scale on a uni-polar channel, and to adjust the zero point for a bi-polar channel. uni-polar channel ? set the jumpers for the required uni-polar range. ? monitor the output voltage ref. analogue 0v. ? use the program to set the dac to half-scale (0800h) ? adjust the corresponding trimmer to give 2.50v (5v range) or 5.00v (10v range). bi-polar channel ? set the jumpers for the required bi-polar range. ? monitor the output voltage ref. analogue 0v. ? use the program to set the dac to half-scale (0800h) ? adjust the corresponding trimmer to give 0.00v. vr5 vr6 10v reference adjust 5v reference adjust
2192-09063-000-000 j260 pcdac 12-4 page 11 connectors signal t itle +5v 50 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 17 33 49 16 32 48 15 31 47 14 30 46 13 29 45 12 28 44 11 27 43 10 26 42 9 25 41 8 24 40 7 23 39 6 22 38 5 21 37 4 20 36 3 19 35 2 18 34 1 +5v +12v -12v d-a4 v.out d-a3 v.out d-a2 v.out d-a1 v.out 0va 0va extin4 0va extin3 0va extin2 0va extin1 0va 0va 0va 0va d-a4 l.out 0va d-a3 l.out 0va d-a2 l.out 0va d-a1 l.out 0v 0v d t ype no. rc no.
2192-09063-000-000 j260 pcdac 12-4 page 12 installation for ce compliance to maintain compliance with requirements of the emc directive (89/336/eec) this product must be correctly installed. the pc in which the board is housed must be ce compliant as declared by the pc manufacturer. the external i/o cable should be arcom cab50ce or a fully screened cable to the same pattern. 1 . remove the cover of the pc observing any additional instructions of the pc manufacturer. 2 . locate the board in a spare isa slot and press gently but firmly into place. 3 . ensure that the metal bracket attached to the board is fully seated. 4 . fit in the bracket clamping screw and firmly tighten this on the bracket. 5 . fit the screened i/o cable to the 50 way board connector. 6 . ensure that the jack screws for the cable connector are tightened (use a screw driver). 7 . replace the cover of the pc observing any additional instructions on the pc manufacturer. the following standards have been applied to this product: bs en50081-1 : 1992 generic emissions standard, domestic, commercial, light industry bs en50082-1 : 1992 generic immunity standard, domestic, commercial, light industry bs en55022 : ite emissions, class b, limits and methods.
2192-09063-000-000 j260 pcdac 12-4 page 13 circuit diagrams
2192-09063-000-000 j260 pcdac 12-4 page 14
2192-09063-000-000 j260 pcdac 12-4 page 15
2192-09063-000-000 j260 pcdac 12-4 page 16

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