Datasheet

Voltage Input
TheSGD28-Mfeatures2voltageinputs,whichuseaProgrammableGainAmplier(PGA)tomakethebestuseofavailableresolution(the
smallestvoltagerangeoffersthehighestresolution).Eachchannelcanbeprogrammedindependently,withtheoptionofeightdifferent
inputvoltageranges:
SGD 28-M
PanelPilotCompatibleSmartGraphicsDisplay
Specicationsliabletochangewithoutpriorwarning Issue404/2011S.LAppliestoSGD28-M Page2of5
Theinputvoltagerangeisdecidedusingthetwovoltagesthattheuserentersinthe
scalingsectionofthePanelPilotsoftware.Thesoftwareusesthesmallestrange
available,whichcanaccommodatebothofthevoltagesenteredbytheuser.The
absolutemaximumvoltageinputis40Vd.c.
Forexample:
Enteringavoltagescaleof0–30Vinthesoftwarewillusethe0–40Vrange.
Enteringavoltagescaleof0–3Vinthesoftwarewillusethe0–4Vrange.
Enteringavoltagescaleof5–15Vinthesoftwarewillusethe0–20Vrange.
HARDWARE
Screw Terminal Functions
1IN2 Analoguevoltageinput2(maximumof40Vd.c.)
2IN1 Analoguevoltageinput1(maximumof40Vd.c.)
30V 0Vpowersupplyinput
4V+ Positivepowersupplyinput(4V–30Vd.c.)
Typical Supply Current
VoltageRange(V)
0-1.25
0-2.5
0-4
0-5
0-8
0-10
0-20
0-40
Resolution(mV)
4.9
2.4
2.0
1.2
1.0
0.3
9.8
0.6
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USB connection
A‘TypeAtoMini-B’USBcableisrequiredtoprogramandcustomisetheSGD28-M.Ittypicallytakes10secondstosendaconguration,
withanadditional5secondsneededforthehardwaretoreset.
TheSGD28-McanbepowereddirectlyfromUSBandiscompatiblewithbothUSB1.1andUSB2.0.Thescrewterminalsandadvancedcon-
nectorcanremainconnectedwhilstusingUSB,butitisnotnecessaryforV+tobepowered.
Note:V+,IN1andIN2shareacommonground(i.e.notoatingorisolatedfromeachother).
0
100
200
4
17
30
Current(mA)
Voltage(V)