PERSPECTIVE ON MICROWAVE MONITOR AND CONTROL INTERFACES Wayne Miller ********** INSIGHT FROM FOUR DECADES OF ONGOING INDUSTRY DESIGN AT SYSTEM AND COMPONENT LEVELS

SYSTEM WITH MONITOR AND CONTROL INTERFACE DISTINCTIONS SYSTEM CONTROLLER SYSTEM SIDE INTERFACE SYSTEM SIDE INTERFACE SYSTEM SIDE INTERFACE INTERFACE SPECIFICATION INTERFACE SPECIFICATION INTERFACE SPECIFICATION COMPONENT SIDE INTERFACE COMPONENT SIDE INTERFACE COMPONENT SIDE INTERFACE INDIVIDUAL COMPONENT INDIVIDUAL COMPONENT INDIVIDUAL COMPONENT

SPECIFICATIONS AND COMPONENT SIDE INTERFACES FOR CONTROL OF SELECT COMPONENTS SYSTEM CONTROLLER SYSTEM SIDE INTERFACE SYSTEM SIDE INTERFACE SYSTEM SIDE INTERFACE LOGIC LEVELS, TRUTH TABLE ANALOG VOLTAGE, TRANSFER FUNCTION, LOGIC LEVELS SOLENOID PARAMETERS, MOTOR PARAMETERS, DRIVE INTERFACE, TIMING, TRANSFER FUNCTION LOGIC BUFFERS, TRANSLATORS, DECODERS BUFFER, LINEARIZER, DAC DRIVERS, TIMERS,, POWER CONTROLLER, POSITION SENSORS, LINEARIZER DIGITALLY CONTROLLED DEVICE (SOLID STATE SWITCH, SYNTHESIZER, SUBSYSTEM) VOLTAGE OR CURRENT CONTROLLED DEVICE (ANALOG PIN ATTENUATOR, VARACTOR TUNED OSC ) ELECTROMAGNETICALLY CONTROLLED DEVICE (SOLENOID SWITCH, MOTOR DRIVEN DEVICE)

MONITOR CONTROL

SPECIFICATIONS AND COMPONENT SIDE INTERFACES FOR MONITORS IN SELECT COMPONENTS SYSTEM CONTROLLER SYSTEM SIDE INTERFACE SYSTEM SIDE INTERFACE SYSTEM SIDE INTERFACE THRESHOLD LIMITS, TRUTH TABLE, LOGIC LEVELS TRANSFER FUNCTION, ACCURACY, ANALOG OR DIGITAL, FORMAT TRUTH TABLE, LOGIC LEVELS DETECTORS, WINDOW COMPARATORS, DECODERS DETECTORS, SENSORS, BUFFERS, LINEARIZERS, DACs LOGIC BUFFERS, DECODERS DEVICES WITH BUILT IN TEST (MONITORING OF VOLTAGE, CURRENT, OR RF LEVELS) DEVICES WITH QUANTITATIVE REPORTING (LEVELS, POSITION) DEVICES WITH DIGITAL OUTPUTS (MECHANICAL SWITCHES, LOCK ALARMS)

PRESENT REQUIREMENTS FOR COMPONENT M&C INTERFACE << STANDARDIZED INTERFACE IS DESIRABLE >>

SPECIFIC SYSTEM REQUIREMENTS FROM SYSTEMS INTEGRATORS PROS CONS DIFFERENTIAL (LINE RECEIVERS) BETTER NOISE IMMUNITY MORE INTERFACE CONNECTIONS SERIAL/PARALLEL (SPI) FEWER INTERFACE CONNECTIONS POOR NOISE IMMUNITY, CRITICAL CLOCK LINE OTHER THAN 5V TTL (LVTTL, LVDS, I2C) COMPATIBLE WITH SPECIFIC CONTROLLER NON STANDARD (USE 5V COMPATIBLE LOGIC) IEEE-488 STANDARD FOR TEST EQUIPMENT BULKY CABLE AND CONNECTOR, HARDWARE INTENSIVE SERIAL INTERFACES (USB, ETHERNET, RS-232, -422, -485) STANDARD, BI-DIRECTIONAL, LARGE CAPACITY (NEXT SLIDE)

STANDARD SERIAL INTERFACES TYPE PROS CONS USB LIMITED +5V POWER THROUGH CONNECTOR LARGE HARDWARE AND SOFTWARE OVERHEAD, LIMITED LENGTH RUNS, SINGLE DEVICE PER PORT ETHERNET POSSIBLE POWER OVER ETHERNET CONSUMER CONNECTOR, RS-232 2-WIRE CONNECTION, ADAPTERS AVAILABLE SINGLE DEVICE PER PORT, VARIOUS PROTOCOLS RS-422 4-WIRE CONNECTION, MULTI-DROP CAPABILITY, ADAPTERS AVAILABLE DEDICATED RECEIVER PER DEVICE, RS-485

ASYNCHRONOUS SERIAL COMMUNICATIONS WITH RS-485 BUS ********** BASED ON A STANDARD WITH A LONG SUCCESS RECORD SUPPORTED WITH INEXPENSIVE PARTS AND ADAPTERS CONNECTS UP TO 30 DEVICES ON ONE WIRE PAIR REQUIRES MINIMAL HARDWARE TO IMPLEMENT PROVIDES BI-DIRECTIONAL DATA TRANSFER SUPPORTS CABLE RUNS UP TO 1200 METERS EXHIBITS EXCELLENT NOISE IMMUNITY NEEDS A STANDARD PROTOCOL

SERIAL PROTOCOLS TYPE PROS CONS CAN BUS ADOPTED AND WIDELY USED IN THE AUTOMOTIVE INDUSTRY SPECIALIZED APPLICATION MODBUS WIDELY USED IN INDUSTRIAL CONTROLS MANY VERSIONS, POOR COMPATIBILITY FROM VENDOR TO VENDOR SA-BUS LONG TIME STANDARD FOR SATCOM SYSTEMS HIGH DEVELOPMENT AND SUPPORT COST WMABUS CONTROLLED STANDARD ADAPTED FROM THE SA-BUS PROTOCOL, NO DEVELOPMENT OR SUPPORT COSTS FOR COMPONENT OEMs, COMPATIBLE MODULES FOR A VARIETY OF APPLICATIONS, FULL SYSTEM SUPPORT

RS-485 SYSTEM WITH MONITOR AND CONTROL INTERFACE DISTINCTIONS SYSTEM CONTROLLER UART WITH RS-485 TRANCEIVER UTILIZING A STANDARD INTERFACE SPECIFCATION WMABUS MODULE INTERFACE WMABUS MODULE INTERFACE WMABUS MODULE INTERFACE INDIVIDUAL COMPONENT INDIVIDUAL COMPONENT INDIVIDUAL COMPONENT

MODULES FOR SYSTEM-READY COMPONENTS > FULL SYSTEM CONTROL FROM ONE SERIAL PORT >STANDARD ADAPTERS FOR USB AND ETHERNET >TEST SOFTWARE SUPPLIED WITH PRODUCTS >CONTROL UP TO 26 DEVICES WITH ONE WIRE PAIR >NO DEVELOPMENT COST FOR COMPONENT OEM WMA-046 SP4T SWITCH DRIVER W/ CONNECTOR >SUPPORT TO OEM AND TO SYSTEM INTEGRATOR WMA-039 17 I/O LINES W/ ADC'S SOLDER IN WMA-137 17 I/O LINES W/ ADC'S HEADERS WMA-038 13 I/O LINES CONNECTOR WMA-047 SPDT SWITCH DRIVER W/ CONNECTOR WMA-158 MOTOR DRIVER W/ LINEARIZER