in stocks

　　Quantity: 28pcs

　　Price: US$ 226

　　The MTL4549C/MTL4549Y/MTL5549Y accepts 4/20mA floating signals from safe-area controllers to drive 2 current/pressure converters (or any other load up to 800Ω) in a hazardous area. For HART valve positioners, the module also permits bi-directional transmission of digital communication signals. Process controllers with a readback facility can detect open or short circuits in the field wiring: if these occur, the current taken into the terminals drops to a preset level. The MTL4549C and MTLx549Y are very similar to the MTLx549 except that they provide open circuit detection only (i.e. no short-circuit detection).

　　SPECIFICATION

　　See also common specification

　　Number of channels

　　Two

　　Location of I/P converter

　　Zone 0, IIC, T4–6 hazardous area if suitably certified Div. 1, Group A, hazardous location

　　Working range

　　4 to 20mA

　　Digital signal bandwidth

　　500Hz to 10kHz

　　Maximum load resistance

　　800Ω (16V at 20mA)

　　Minimum load resistance

　　90Ω (short-circuit detection at < 50Ω)

　　Output resistance

　　> 1MΩ

　　Under/over range capability

　　Under range = 1mA

　　Over range = 24mA (load ≤ 520Ω)

　　Input and output circuit ripple

　　<40µA peak-to-peak

　　Communications supported HART

　　Transfer accuracy at 20°C

　　Better than 20µA

　　Temperature drift

　　< 1.0µA/°C

　　Response time

　　Settles within 200µA of final value within 100ms

　　LED indicator

　　Green: power indication

　　Maximum current consumption (with 20mA signals into 250Ω load)

　　70mA at 24V dc

　　Power dissipation within unit (with 20mA signals into 250Ω load)

　　1.6W at 24V

　　Safety description (each channel)

　　Uo=28V Io=93mA Po=0.65W Um = 253V rms or dc