MTL5544 Eaton MTL 2 Channel Zener Barrier Power Supply Repeater
The MTL5544 provides fully-floating dc supplies for energising two conventional 2-wire or 3-wire 4/20mA or ‘smart’ 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 signal so that the transmitter can be interrogated either from the operator station or by a hand-held communicator.
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: 0 to 360Ω @ 24mA
0 to 450Ω @ 20mA
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)
1.4W at 24V dc
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