MTL4541  MTL Instruments Repeater Power Supply

        MTLx541 provides a fully-floating dc supply for energising a conventional 2- or 3-wire 4/20mA transmitter, which is located in a hazardous area, and repeats the current in another floating circuit to drive a safe-area load. For HART 2-wire transmitters, the unit allows bi-directional communications signals superimposed on the 4/20mA loop current. Alternatively, the MTLx541S 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.16ch AIO 4-20mA

REPEATER POWER SUPPLY

4/20mA, HART®, 2- or 3-wire transmitters

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 (MTLx541) : @ 24mA: 0 to 360Ω @ 20mA: 0 to 450Ω

Safe-area load (MTLx541S) : 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 only)

LED indicator : Green: power indication

Maximum current consumption (with 20mA signal) : 51mA at 24V

Power dissipation within unit (with 20mA signal) : MTLx541 0.7W @ 24V dc, MTLx541S 1.0W @ 24V dc