Setup Software
Installation
Operation
& Specifications
Manual
620-0021 R2 © Micro
fl
ex 2016-2021
101-0035
RS-485
MicroLinK HM
RS-485 HART Protocol Modem
HART Device to Modbus Accumulator
DIN Rail Mount
The RS-485 MicroLink-HM 101-0035 is an RS-485 to HART® protocol modem with managed HART master ming to
func on as either a primary or secondary HART master - elimina ng the need for external CD monitoring and RTS
control. It can also be used as a HART to Modbus Concentrator polling up to 16 HART devices. An external 5 to 30
volts DC power supply is required to power the unit.
When used as a HART protocol modem it provides the hardware interface between Highway Addressable Remote
Transducer devices (HART) and an RS-485 network. Serial port baud rates can be set from 1200 to 57,600 and parity
can be odd, even, or none. HART protocol communica ons between the RS-485 MicroLink-HM and HART devices is
always 1200 baud, odd parity.
RS-485 MicroLink-HM can be con
fi
gured to poll up to 16 HART devices and save the HART device data into modbus
registers. Modbus RTU commands can then be used to read the HART device data. Con
fi
gura on is simple using
the included HM Con
fi
gura on so ware. Se ngs are saved in modus registers so modbus RTU commands can also
be used to edit the MicroLink se ngs. No special con
fi
gura on cable is needed for setup as communica on is done
using the RS-485 port A and B. For con
fi
gura on your PC will need an RS-485 port or a suitable converter, such as
the Micro
fl
ex 101-0020 USB to RS-485 converter or the Micro
fl
ex 101-0009 RS-232 to RS-485 converter.
