Product Description

PR 2255B2 Loop-powered HART Temperature Transmitter

The PR 2255B2 is a versatile 2-wire loop-powered HART 7 temperature transmitter designed for converting various input signals, including RTD, thermocouple (TC), Ohm, or millivolt (mV), into a scalable 4…20 mA analog output signal. Specifically engineered for DIN form B sensor head mounting, the PR 2255B2 allows for easy configuration and monitoring through HART communication. It can be pre-configured to meet specific application requirements. Built to stringent safety standards, this transmitter is suitable for use in SIL 2/3 installations and holds certifications for ATEX, IECEx, FM, CSA, and InMetro hazardous area applications.

Technical Specifications:

Input Types: RTD, Thermocouple (TC), Ohm, mV
Output Signal: 4…20 mA (HART protocol)
Supply Voltage: 8.0 to 30 VDC (HART)
Isolation (Input to Output): 1.5 kVAC / 50 VAC
Typical Accuracy (e.g., Pt100): < 0.05% of span
Ambient Operating Temperature: -40°C to +85°C (-40°F to +185°F)
Mounting: DIN form B sensor head
Communication Protocol: HART 7
Configuration: Via HART modem or PR electronics Loop Link 5909
Safety Approvals: SIL 2/3 certified according to IEC 61508
Hazardous Area Approvals: ATEX, IECEx, FM, CSA, InMetro (specific approval markings vary)
Cold Junction Compensation (CJC): Internal, external via Pt100/NTC, or programmable fixed value
Response Time (programmable): 1…60 seconds