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.
INPUT RANGES
| Model SCU Loop Powered Isolator and Converter |
| Input Type |
Range °F |
Range °C |
Type J
Type K
Type T
Type E
Type R
Type S
Type B
Type N
100 Ohm Plat. 0.00385 DIN Curve
120 Ohm Nick. 0.00628 DIN Curve
1000 Ohm Plat. 0.00385 NIST Curve |
-100 to +1600
-200 to +2500
-350 to +750
-100 to +1800
0 to 3200
0 to 3200
+75 to +3308
-100 to +2372
-328 to +1607
-112 to +608
-328 to +1607 |
-73 to +871
-129 to +1371
-212 to +398
-73 to +982
-17 to +1760
-17 to +1760
+24 to +1820
-73 to 1300
-200 to +875
-80 to 320
-200 to +875 |
| Current/Voltage |
Scalable units from -19999 to +19999 |
PHYSICAL DATA
Inputs
< b>J, K, T, E, N, R, S, B
RTD: 100 Ohm Platinum DIN, 1000 Ohm Platinum DIN, 120 Ohm Nickel
Voltage: 0 to 10 VDC
Current: 0 to 20 mADC
Input Characteristics
Thermocouple Input Impedence: 3 M-Ohms minimum.
RTD Search Current: 200 mA
Voltage Input Impedence: 500 Ohms
Current Input Load: 10 Ohms
Input Resolution
High gain (Type T, R, S, B, thermocouples): 1.0 micro-Volts per count.
Low Gain (All other inputs): 2.1 micro-Volts 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 Ohms).
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: 4.5" 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).
