Meriam M1500 Digital Pressure Transmitter - Manual (Page 20)

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Digital Digital Digital Digital Wiring Wiring Wiring Wiring Diagrams Diagrams Diagrams Diagrams
RS RS RS RS- - - -23 23 23 232 2 2 2 Communication Communication Communication Communication
For RS-232 communication use the terminal block for power and the DB-9 connector for communications. Provide 8-
36 VDC
power (20 mA minimum) by connecting to the +supply to the PWR+ terminal. Connect the –supply to the
PWR- terminal adjacent to PWR+. For communications connect the receiving device to the M1500’s DB-9 (female)
serial port (see DB-9 Pin Out Table above) or to the M1500’s RX and TX terminals. Terminal labels follow RS-232
standard TIA/EIA-232.The digital interface draws 20 mA of current or less.
RS RS RS RS- - - -485 Communication 485 Communication 485 Communication 485 Communication
For RS-485 communication use the terminal block for power and communication. Provide 8-36 VDC power (20 mA
minimum) by connecting to the +supply to the PWR+ terminal. Connect the –supply to the PWR- terminal adjacent to
PWR+. For communications connect the receiving device to the M1500’s A and B terminals. The digital interface
draws 20 mA of current or less.
USB Communication USB Communication USB Communication USB Communication
Connect to the USB type B female connector of the M1500. Use with
high power (500 mA) USB ports or powered USB hubs only.
5 4 3 2 1
9 8 7 6
DB9 Pin Out RS-232 DCE
1 GND ---
2 RX Out
3 TX In
5 GND ---
RS-485 B(-)
RS-485 A(+)
RS-232 RX
RS-232 TX
Vin(8-36V)
GND
Chassis GND