Process Signal Converter/Isolator Series SCU From Love Controls

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.

SPECIFICATIONS

INPUTS
  Thermocouple: J, K, T, E, R, S, B, N.
  RTD: 100 Ω Platinum DIN, 1000 Platinum DIN, 120 ; Nickel.
  Voltage: 0 to 10 VDC.
  Current: 0 to 20 mA DC.
INPUT CHARACTERISTICS
  Thermocouple Input Impedance: 3 M minimum.
  RTD Search Current: 200 mA.
  Voltage Input Impedance: 5000 .
  Current Input Load: 10 .
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 ).
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).

INPUT RANGES
Input Type Range °F Range °C
Type J -100 to 1600 -73 to 871
Type K -200 to 2500 -129 to 1371
Type T -350 to 750 -212 to 398
Type E -100 to 1800 -73 to 982
Type R 0 to 3200 -17 to 1760
Type S 0 to 3200 -17 to 1760
Type B 75 to 3308 24 to 1820
Type N -100 to 2372 -73 to 1300
100Ω Plat. 0.00385 DIN Curve -328 to 1607 -200 to 875
120Ω Nick. 0.00628 US Ind. Curve -112 to 608 -80 to 320
1000Ω Plat. 0.00385 Nist Curve -328 to 1607 -200 to 875
Current/Voltage Scalable units from -19999 to 19999

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