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Eaton MTL4544 REPEATER POWER SUPPLY
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MTL4544/S – MTL5544/S REPEATER POWER SUPPLY 2-channel, 4/20mA, HART®, 2- or 3- wire transmitters
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The MTLx544 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.
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SPECIFICATION
See also common specification
Number 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)
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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
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CATEGORIES
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Tel：+86 18681453433
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