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VXI VT1536A manual

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Table of contents for the manual

  • Page 1

    Where to Find it - Online and Printed Information: System installa tion (har dware/soft ware) .......... .. VXIbus Co nfigura tion Guid e* HP VIC (VXI inst allation softwa re)* Module c onfigu ration and wiri ng .......... ........ ..... This Manual SCPI pr ogrammin g ........... ....... ....... ....... ........ ..... This M anual VXI plug&p la[...]

  • Page 2

    [...]

  • Page 3

    VT1536A Isolated Digital Input/Output SCP 3 VT1536A Isolated Digit al Input/Output SCP Introduction The VT1536A is an eig ht-channe l Isol ated Digital I /O SCP . Channel s are swit ch configurabl e as eit her input or output on a channel-by- channel basis. Input-c onfigu red cha nnels provid e: • Optical ly coup led isolati on • Individ ual sw[...]

  • Page 4

    4 VT1536A Isolated Digital Input/Output SCP Identifying the Plug-on Y ou'l l find t he VXI T echnology par t number on the connector side o f the SCP . For the VT1536 A, the pa rt number i s: VT1536 A. Setting Config uration Switch es Each chann el has a four -swi tch packa ge that confi gure its input threshol d voltage level and I/ O direc t[...]

  • Page 5

    VT1536A Isolated Digital Input/Output SCP 5 Configuring for Input Refe r again t o Figure 1 for the four va lid input thre shold, sw itch configur atio ns. Ta b l e 1 shows the "input zero" and "input one" level s for the nomina l thre shold settings . Configuring for Output By turnin g all fou r of i ts thres hold-s etting s wi[...]

  • Page 6

    6 VT1536A Isolated Digital Input/Output SCP Recomm en ded Signal Connectio ns Figure 3 shows th e recommended me thod of wiring isolate d digi tal I/O channels , as wel l as the ma ximum volt age limit ation s for the VT1536A. Figure 3 s hows the shield s connected direc tly to the VT1415 A/19A ground. This is to limi t potent ial no ise on the iso[...]

  • Page 7

    VT1536A Isolated Digital Input/Output SCP 7 Input and Output Characteristics This sec tion desc ribes the elect rica l charac teri stics of the SCP' s input an d output se ction s, as well as the oper ation of t he inpu t debounce t imers. Fi gure 4 shows a s implifie d schemat ic of one VT1536A chan nel. Input Char a cteris ti cs The inp ut s[...]

  • Page 8

    8 VT1536A Isolated Digital Input/Output SCP Output V olt age Clamp The output section in corporate s a "c rowbar" pr otect ion type voltag e clamping diode. I n normal ope rati on with the relay volta ge at or be low 56 V olts peak, the diode has vir tual ly no ef fec t (other than a bout 10 nanoamper es of leakage cur rent). At 60 V olts[...]

  • Page 9

    VT1536A Isolated Digital Input/Output SCP 9 complete ly asynch ron ous with th e VT1415A/19A al gorit hm executi on rate as set by the T rigger Timer ( TRIG:T IM ER command) . Long deb ounce periods combine d with fast T rigger T imer setti ngs would have the algor ithm execu ting seve ral t imes fo r each input d ebounce -and-lat ch per iod. Conve[...]

  • Page 10

    10 VT1536A Isolated Digital Input/Output SCP Programming With SCPI Commands The SCPI comma nds s hown he re quer y the SCP's identi fi ca ti on st ri ng, and perfor m VT1536A chann el conf igurati on. The VT14 15A/19A doe sn't provide SCPI commands to rea d an in put channel or con trol an o utput channel. Read and write o perat ions are [...]

  • Page 11

    VT1536A Is olated Digital Input/Output SCP 11 • INP:THR:LEV? retur ns a n umeric value which is one of 5 , 12 , 24, 48 or 0 (zero) where zero means t hat t he channel is conf igure d as an out put and no n-zero values i ndicat e the inpu t thr eshold in vol ts. Note If an in vali d s witc h c ombin ation is set, INP:THR:LEV? wi ll NOT retur n a v[...]

  • Page 12

    12 VT1536A Isolated Digital Input/Output SCP Choose a va lue fr om the “ Minimum Period” column i n Ta b l e 2 that is longer t han your input si gnal’ s undesired t ransit ion per iod when you want to e xclude these short ter m in put signal tran sitions . Choose a v alu e fro m the “M ax im um Pe riod” col u mn i n Ta b l e 2 that is sh[...]

  • Page 13

    VT1536A Is olated Digital Input/Output SCP 13 Note The INP:DEB:TIME genera te th e error 31 08, "E153 6 debounc e - ea ch refer enced 4 Ch ba nk mus t cont ain at least o ne in pu t". T his er ro r indi cates that you tr ied t o set a debounc e t ime for a bank of channe ls th at contai ns no input co nfigur ed channel . T o set the debo [...]

  • Page 14

    14 VT1536A Isolated Digital Input/Output SCP Programming with the VT14 15A/19A Algorithm Language The foll owing ex ample sho ws the c ommand sequ ence (p latf orm/la nguage independ ent) to transf er the digital state s from t he lower 4 channe ls (in puts) to the up per 4 ch anne ls (ou tputs ). I n ot her wor ds, t he state you input t o on e of[...]

  • Page 15

    VT1536A Is olated Digital Input/Output SCP 15 S pecif ication s SCP Power Supply Req uirement s +5 Vmax +24 Vtyp +24 V max -24 Vtype -24 Vmax 0.072 not used not used Output Characteris tics (see also Figure 4 ) Characteristic S p ecifi catio n Maximu m Continuo us Vo l t a g e 56 VDC (39 V RMS ) Peak Curr ent Load 200 mA Rela y On Resi st anc e 10 [...]

  • Page 16

    16 VT1536A Isolated Digital Input/Output SCP Notes:[...]