Siemens Energy & Automation”s Sitrans TR200 and Sitrans TR300 are two-wire temperature transmitters designed for rail mounting. When connected in the 4-20 mA loop, these devices need no additional power supply. The Sitrans TR200 temperature transmitter is configured using a PC, and the Sitrans TR300 transmitter can be configured using a HART interface. Both devices feature a diagnostics LED that indicates the function status and detects open or short circuits so they can be corrected. This feature is particularly useful when dealing with a large number of measuring points. The temperature transmitters support all standard RTDs and thermocouples, as well as resistance and voltage inputs. DIN rail mounting system enables the transmitters to be set up and maintained in a central location away from any harsh environmental conditions.