233 Serial Communication Guard Crossing

The Microprocessor communicates with the Analog Measurement Processor using this isolated two-wire, full-duplex asynchronous interface circuit.

When the Microprocessor is transmitting to the Analog Measurement Processor, the transmit data bits appear at A1U6-11, which drives the combination of AQ19, A1R33 and A1U3-1. The optocoupler A1U3 then optically transfers this information to its output circuit, comprised of A1U3-7, A1R30, A1R28 and A1R27. The transmitted data is then presented to A1TP4 and A1U1-40.

When the Analog Measurement Processor is transmitting data back to the Microprocessor, the data bits appear at A1U1-39, which drives the input of a Darlington driver A1U2-1. The Darlington driver output then drives A1R29 and A1U4-1 to transfer the information to the output of the optocoupler at A1U4-7. Resistors A1R32 and A1R34 complete the optocoupler output circuit. Data is then routed to A1TP7 and A1U6-10 on the Microprocessor.

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

Get My Free Ebook

Post a comment