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
