KEP SUPERtrol II Manual
Also see for SUPERtrol II: Startup guide
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Contents
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SUPERtrol II Flow Computer118Flow Computer RS-485 Port Pinout (recommended mating connector: DB-9M)1 Ground2 Ground3 Ground4 TX/RX (+)5 TX/RX (-)6 Do Not Use7 Terminating Resistor (180 Ω)8 TX/RX (+) (spare internally connected to 4)9 TX/RX (-) (spare internally connected to 5)Flow Computer RS-485 Port Pinout (Terminal Block Option)1 Common2 TX/RX (+)3 TX/RX (-)4 Terminating Resistor (180Ω)Installation OverviewA two wire RS-485 may be multidropped up to 4000 ft. and up to 32 units may be chained together. A RS-485 to RS-232 interface adapter is required at the PC. An optically isolated type is recommended. Suitablewiring should be selected based on anticipated electrical interference. Terminators should be used to helpimprove the quality of electronic signals sent over the RS-485 wires. The RS-485 chain should be termi-nated at the beginning (RS-485 adaptor) and at the last device in the RS-485 chain and nowhere else. Onthe Flow Computer this is accomplished by connecting a jumper from the terminal labeled TerminatingResistor (180 Ω) to the terminal labeled TX/RX(+) at the RS-485 port. If lightning protection is required, asuitable surge protector should be used.For additional information, refer to the technical requirements of EIA-485, interface adaptor user manualand the communication software user manualFlow Computer Communication Setup MenuThe setup menu allows Modbus RTU Protocol communications parameters of: Device ID, Baud Rate, andParity to be selected to match the parameters of your RS-485 network. Each Flow Computer must have it’sown Device ID and the same Baud Rate and Parity setting.123456789 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24123456789123456789RS-232 RS-485 1 2Phone Line forInternal ModemOption1 2 3 41 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24123456789RS-232RS-485Phone Line forInternal ModemOption1 2Appendix C- RS-485 Modbus Protocol (continued) |
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