The 101-0003 InLink evaluation board provides product developers the ability to quickly evaluate InLink HART protocol modems. 

Socket supports all InLink modules to provides a simple RS-232 to HART interface compatible with most off-the-shelf HART protocol software including PACTware and the Microflex Generic HART DTM. 

InLink modem modules are sold separately.
Works with InLink-HM, InLink-CC, and InLink-TC

101-0003 Schematic (PDF)

See also...
101-0014 InLink-HM HART + Modbus Accumulator (transformer isolated)
101-0015 InLink-CC HART protocol modem (capacitor coupled)
101-0016 InLink-TC HART protocol modem (transformer isolated)