System Layout Diagram (Simplified & Color-Coded) Proper TriVibe Layout: A Modbus Master which has properly designed RS-485 (TIA-485(-A)/EIA-485)ports with built-in pullup and pulldown resistors enabled to enforce the RS485 (TIA-485(-A)/EIA-485) electrical standard. A single field cable bus trunk for each RS-485 (TIA-485(-A)/EIA-485) portavailable from the Modbus Master. Each T-Port connection terminal allows a TriVibe Tri-Axial Vibration Sensor todrop off the field cable bus trunk by way of the integral sensor cable. On each available RS485 (TIA-485(-A)/EIA-485) port, only the last/furthest T-Port connection terminal should have a jumper installed, thereby enabling the 120Ωterminating resistor. As long as you do not plan to expand with more TriVibe Tri-Axial VibrationSensors on a particular field cable bus trunk, It is permissible to use the last setof terminals of the last/furthest T-Port to connect a TriVibe by way of the integralsensor cable. Field cable which adheres to RS-485 (TIA-485(-A)/EIA-485) specification andMachine Saver's recommended characteristics. Total length of field cable bus trunk should not exceed 2800 feet (855 meters)for Modbus Masters communicating at a baudrate of 115,200 bit/s. 24 - 36 VDC should be verified available to power each TriVibe Tri-Axial VibrationSensor at each T-Port connection terminal which includes the T-Port which isfurthest/last on the field cable bus trunk from the Modbus Master. Improper TriVibe Layout: A Modbus Master which has IMPROPERLY designed RS-485 (TIA-485(-A)/EIA-485)ports. Missing (or disabled) built-in pullup and pulldown resistors leaving thebias-voltage at an unknown level. A field cable bus trunk which uses a T-Port connection terminal to attempt tosplit the field cable bus trunk, thereby violating the RS-485 (TIA-485(-A)/EIA-485)electrical communication standard. The above issue also results in 2 furthest T-Port connection terminals to beidentified, if you attempt this and see there are 2 possible places to installa jumper AND/OR if you have more than 1 jumper per RS-485 port re-evaluate yourlayout. The layout cannot remain in these conditions and function appropriately. Field cable adheres to RS-485 (TIA-485(-A)/EIA-485) specification andMachine Saver's recommended field wire chart characteristics. Total length of field cable bus trunk MUST NOT EXCCED 2800 feet(855 meters) for Modbus Masters communicating at a baudrate of 115,200bit/s. Allowing the voltage supplied to any TriVibe Tri-Axial Vibration Sensor at anyT-Port connection terminal to drop below 24 - 36 VDC which includes the furthest T-Port from the Modbus Master. Allowing the current supplied to any TriVibe Tri-Axial Vibration Sensor at anyT-Port connection terminal to drop below 50 milliamps.