GE IS200TBDGH2AAA Control PCB board

Description

GE General Electric Technical Specifications: IS200TBDGH2AAA

The impact of the microprocessor has, at . least, been

overwhelmiDg.: As consumers, most of us would be’ hard

pressed toJihd any appliance that doesn’t have some type of

microprocessor conta,ned within. Ln the area of i I’lstrument

ation the microprocessor has brought about the develop

ment of a new generation of “smart” instruments.

Even though the areas of instrumentation and consumer

products have .provided.· great in,roads for the micro

processor, its utilization is still limited by the “real-world”

interfaces through which the microprocessor must

IS200TBDGH2AAA communicate.These interfaces must handle such things as

current and voltage levels which would be destructive t.othe

MOS circuitry contained within the IC package. The advent

of the solid-sta.te optically-isolated relay has lessened the

impact of these “real-world” interface,problems. It iswith

this in mind that this application nate will show haw ta

interface a microcomputer system (based upan Mostek’s

MD-SERIES) to an OPTO-22 PB24 which is a 24-channel

110 panel utilizing,Opto 22’s family .of solid-state relays.

In general, when controlling valtages in excess of 5 volts

and currents,in excess of 50 milliamps, devices other than

IS200TBDGH2AAA ICs must be used. The salid state relay has provided the

system designer with the perfect interface between the low

current, law valtage world of the microprocessar and that of

the real world. These relays come in many different sizes

and specificatians with regards to voltage and current. For

this application ,note, we will be dealing with the plug-in

modules offered ,by such manufacturers as Opto-22,

Gordas, and Guardian. These modules come in bathAC and

DC versions with inputs and .outputs available in each type.

In general, these modules are capable afcontralling up to 3

IS200TBDGH2AAA amps at their respective voltage ratings. This fact serves to

limit the applications .of these devices ta low power direct

control or high power indirect cantral through the use of

higher power relays. Figure 1 shaws a block diagram of this

system.

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