in stocks

　　Quantity: 35pcs

　　Price: US$ 200

　　The MTL4575/MTL5575 converts a low-level dc signal from a temperature sensor mounted in a hazardous area into a 4/20mA current for driving a safearea load. Software selectable features include linearisation, ranging, monitoring, testing and tagging for all thermocouple types and 2-, 3- or 4-wire RTDs. (For thermocouple applications the HAZ-CJC plug on terminals 1–3 includes an integral CJC sensor). Configuration is carried out using a personal computer. A single alarm output is provided and may be configured for process alarm or to provide notice of early thermocouple failure.

　　SPECIFICATION

　　See also common specification Number of channels

　　One

　　Signal source

　　THC types J, K, T, E, R, S, B or N to BS 60584 and XK mV input RTDs 2/3/4-wire platinum to BS 60751 Pt 100, Pt 500, Pt 1000 Cu-50 & Cu-53 Ni 100/500/1000 DIN 43760

　　Location of signal source Zone 0, IIC, T4-6 hazardous area Division 1, Group A, hazardous location

　　Input signal range

　　–75 to +75mV, or 0 to 400Ω (0 to 1000Ω Pt & Ni sensors)

　　Input signal span 3 to 150mV, or 10 to 400Ω (10 to 1000Ω Pt & Ni sensors)

　　RTD excitation current

　　200µA nominal

　　Cold junction compensation Automatic or selectable

　　Cold junction compensation error

　　≤ 1.0°C

　　Common mode rejection

　　120dB for 240V at 50Hz or 60Hz (500ms response)

　　Series mode rejection

　　40dB for 50Hz or 60Hz

　　Calibration accuracy (at 20°C) (includes hysteresis, non-linearity and repeatability) Inputs: (500ms response)

　　mV/THC: ± 15µV or ± 0.05% of input value (whichever is greater)

　　RTD: ± 80mΩ

　　Output: ± 11µA

　　Temperature drift (typical)

　　Inputs: mV/THC: ± 0.003% of input value/°C

　　RTD: ± 7mΩ/°C

　　Output: ± 0.6µA/°C

　　Example of calibration accuracy and temperature drift (RTD input - 500ms response)

　　Span: 250Ω Accuracy: ± (0.08/250 + 11/16000) x 100% = 0.1% of span Temperature drift: ± (0.007/250 x 16000 + 0.6) µA/°C = ±1.0µA/°C

　　Safety drive on sensor failure

　　Upscale, downscale, or off

　　Early burnout

　　Early burnout detection for thermocouples (when selected) Alarm trips when loop resistance increase is > 50Ω

　　Output range

　　4 to 20mA nominal into 600Ω max.

　　Alarm output (configurable)

　　Relay ON in alarm, 250mA @ 35V max

　　Maximum lead resistance (THC)

　　600Ω

　　Response time

　　Configurable - 500 ms default (Accuracy at 100/200ms - contact MTL)

　　LED indicator

　　Green: power and status indication

　　Yellow: alarm indication, on when contacts are closed

　　Maximum current consumption (with 20mA signal)

　　50mA at 24V

　　Power dissipation within unit (with 20mA signal)

　　1.2W at 24V

　　Safety description

　　Refer to certificate for parameters. Um=253V rms or dc

　　Configurator

　　A personal computer running MTL PCS45 software with a PCL45USB serial interface.