in stocks

　　Quantity: 50pcs

　　Price: US$ 175

　　The MTL4544 provides fully-floating dc supplies for energising two conventional 2-wire or 3-wire 4/20mA or HART transmitters located in a hazardous area, and repeats the current in other circuits to drive two safe-area loads. For smart transmitters, the unit allows bi-directional transmission of digital communication signals superimposed on the 4/20mA loop current. Alternatively, the MTLx544S acts as a current sink for a safe-area connection rather than driving a current into the load. Separately powered current sources, such as 4-wire transmitters, can be connected but will not support HART communication.

　　SPECIFICATION

　　See also common specification N

　　umber of channels

　　Two

　　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 (MTLx 544)

　　@ 24mA: 0 to 360Ω

　　@ 20mA: 0 to 450Ω

　　Safe-area load (MTLx544S) Current sink: 600Ω max.

　　Maximum voltage source: 24V dc

　　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 and 4 & 5 only)

　　LED indicator

　　Green: power indication

　　Maximum current consumption (with 20mA signals)

　　96mA at 24V dc

　　Power dissipation within unit (with 20mA signals)

　　MTLx544 1.4W @ 24V dc

　　MTLx544S 1.9W @ 24V dc

　　Safety description (each channel)

　　Terminals 2 to 1 and 3, and 5 to 4 and 6: Uo=28V Io=93mA Po=651mW Um = 253V rms or dc

　　Terminals 1 to 3 and 4 to 6: Simple apparatus ≤1.5V, ≤0.1A and ≤25mW; can be connected without further certification into any IS loop with an open-circuit voltage <28V