Power
Supply
RS-485/RS-232
Transceiver
HART
Modem
Microcontroller
Modbus Register
Tables
TX
RX
CD
RTS
1 - DC (+)
2 - DC (-)
3 - GND
4 - TX B
5 - RX A
5-Pin
Terminal Block
HART Loop
Terminals
HART LED
COM LED
USB
MicroLink-HM+ Block Diagram
HART Loop Screw Terminals
USB Port
HART Transmit/Receive LED
DIN Rail Release
Serial Port Transmit/Receive LED
+/- DC Power 5-30VDC
G Serial Port Common
B/A RS-485 Port
TX/RX RS-232 Port
3