رله بریرمدل MTL4575-5575

The MTL4575-5575 converts a low-level dc signal from a temperature sensor mounted in a hazardous area into a 4/20mA current for driving a safearea load. Software selectable features include linearisation, ranging, monitoring, testing and tagging for all thermocouple types and 2-, 3- or 4-wire RTDs. (For thermocouple applications the HAZ-CJC plug on terminals 1–3 includes an integral CJC sensor). Configuration is carried out using a personal computer. A single alarm output is provided and may be configured for process alarm or to provide notice of early thermocouple failure

Number of channels :One

Input signal range :–75 to +75mV, or 0 to 400Ω (0 to 1000Ω Pt & Ni sensors) 3 to 150mV, or 10 to 400Ω (10 to 1000Ω Pt & Ni sensors)

RTD excitation current 200µA nominal

Cold junction compensation Automatic or selectable

Output range 4 to 20mA nominal into 600Ω max.

Alarm output (configurable) Relay ON in alarm, 250mA @ 35V max