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 The
Model SCU is a universal
analog input, loop powered transmitter for isolation, display
and retransmission of all common process sources. The input allows
selection of one of eight thermocouple types, three RTD types
and process inputs, scalable in engineering unit from -19999
to +19999, with adjustable decimal points. Featuring 1500 V isolation
between input and output, the SCU also offers two independent
alarms for additional application flexibility. Dimensional
Information
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INPUTS
Thermocouple: J, K, T, E, R, S, B, N.
RTD: 100 Ω Platinum DIN, 1000 Ω Platinum
DIN, 120 Ω Nickel.
Voltage: 0 to 10 VDC.
Current: 0 to 20 mA DC.
INPUT CHARACTERISTICS
Thermocouple Input Impedance: 3 MΩ minimum.
RTD Search Current: 200 mA.
Voltage Input Impedance: 5000 Ω.
Current Input Load: 10 Ω.
INPUT RESOLUTION
High gain (Type T, R, S, B, thermocouples): 1.0 µV
per count.
Low Gain (all other inputs): 2.1 µV per count.
Input/Output Accuracy: ±0.1% of full span of selected input.
Drift: ±0.1% (100 ppm) per °C typical, ±0.2% (200
ppm) per °C maximum.
Operating Temperature Range: -4 to 131°F (-20 to 55°C).
Power Supply Requirements: (Load resistance x 0.020): +10 VDC minimum,
45 VDC maximum (maximum load 2250 Ω).
Process Output: 4 to 20 mA DC.
Input Isolation: 1500 V.
Alarm Outputs: Open collector, 24 VDC @ 24 mA maximum, non-isolated.
Mounting: Industry standard 35 mm DIN rail, DIN EN50022-35. Surface
mount adaptor available.
Display: 4-1/2 digit LCD, 0.3" high (7.62 mm) with descriptors for °C, °F,
mV, V, mA, %, Alarm 1, Alarm 2.
Weight: 8 oz (230 g).
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