in stocks

　　Quantity: 50pcs

　　Price: US$ 160

　　The MTL4544D/MTL5544D provides a fully-floating dc supply for energising a conventional 2- or 3-wire 4/20mA transmitter located in a hazardous area, and repeats the current in other circuits to drive two safe-area loads. For HART 2-wire transmitters, the unit allows bi-directional transmission of digital communication signals superimposed on the 4/20mA loop current. Separately powered current sources, such as 4-wire transmitters, can be connected but will not support HART communication.

　　SPECIFICATION

　　See also common specification

　　Number of channels

　　One

　　Location of transmitter

　　Zone 0, IIC, T4–6 hazardous area if suitably certified

　　Div. 1, Group A hazardous location

　　Safe-area output

　　Signal range: 4 to 20mA

　　Under/over-range: 0 to 24mA

　　Safe-area load resistance

　　@ 24mA: 0 to 360Ω

　　@ 20mA: 0 to 450Ω

　　Safe-area circuit output resistance: > 1MΩ

　　Safe-area circuit ripple

　　< 50µA peak-to-peak

　　Hazardous-area input

　　Signal range: 0 to 24mA (including over-range)

　　Transmitter voltage: 16.5V at 20mA

　　Transfer accuracy at 20°C Better than 15µA

　　Temperature drift < 0.8µA/°C

　　Response time

　　Settles to within 10% of final value within 50µs

　　Communications supported

　　HART (terminals 1 & 2, output Ch 1 only)

　　LED indicator

　　Green: power indication

　　Maximum current consumption (with 20mA signals)

　　96mA at 24V dc

　　Power dissipation within unit (with 20mA signals)

　　1.4W @ 24V dc

　　Safety description

　　Terminals 2 to 1 and 3: Uo=28V Io=93mA Po=651mW Um = 253V rms or dc

　　Terminals 1 to 3: Simple apparatus ≤1.5V, ≤0.1A and ≤25mW; can be connected without further certification into any IS loop with an open-circuit voltage <28V