Siemens SITRANS IQ Operating Instructions Manual page 11

Connecting SITRANS MX300 without HART Master
1. If no HART Master exists for a channel, connect the SITRANS MX300 for this channel in series
to the HART device.
2. Enable [ENABLED] the corresponding HART resistor. (Default: disabled [DISABLED])
3. Connect one HART device per SITRANS MX300 channel using a two-pole cable.
– The channels on the SITRANS MX300 have no polarity.
SITRANS CC240 and SITRANS MX300
Operating Instructions, 06/2021, A5E47280695-AB
1.2 Connecting HART devices to SITRANS MX300
Getting started
11