SCT-20 Signal Conditioning Transmitter
Control in Miniature
For PLC systems that require weight data from a scale, Rice Lake’s compact SCT-20 transmitter delivers equivalent signal-conditioning function without the cost or bulk of a full size weight indicator/controller. Each Rice Lake SCT-20 is DIN-rail mountable within a cabinet or control panel, where it converts a scale’s load cell signals to analog output, serial output, or a specific network protocol. Unlike many other signal transmitters, Rice Lake’s SCT-20 has its own .3 inch weight display, with annunciators for unit and weighing status, and push buttons for zero, tare and setpoint entry—simplifying scale setup, calibration and operation.
Features
Space saving, vertical shape with DIN-rail mounting
Displays weight, configuration, calibration and error conditions
Theoretical calibration, real-weigh calibration, linearity calibration
Push button or preset tare
Converts digital weight to analog output or optional DeviceNet™ or Profibus™ or EtherNet/IP™ protocol
Supports ASCII or MODBUS-RTU protocols
Full-scale analog output with zero setting and PLC correction of analog signal
Bit swapping selection for little endian and big endian format
Two digital inputs, three digital outputs
One serial port, RS-232 simplex and RS-485 connection
CD manual
Specifications
Power:
Input: 12 -24 VDC
Power consumption: 5 watts
Excitation Voltage:
5VDC, 120mA, 8 x 350Ω
Analog Signal Input Range:
+/- 39mV
Analog Signal Sensitivity:
0.1 µV/graduation minimum
1.0 µV/graduation recommended
A/D Sample Rate:
300 Hz
Resolution:
Internal resolution: 16 million counts
Weight display resolution: 999,999
System linearity: ± 0.01% full scale
Digital Inputs/Outputs:
2 inputs 5-24VDC, 3 outputs 115VAC/150mA N.O. or N.C. (dry contact)
Serial Port:
RS-485 or RS-232 simplex supports up to 115,200 bps
Analog Output:
Optoisolated, 16 bit
0-20mA, 4-20mA (max 300 ohm)
0-10VDC, 0-5VDC (min 10k ohm)
Display:
0.3 in (8 mm), six digit, seven segment LED
Annunciators: Net, center of zero, stability, KG, G, LB
Keyboard:
4-key membrane panel, tactile feel
Zero, Tare, Print, Menu, Escape, Left & Up Navigation, Enter
Operating Temperature & Humidity:
Working Temperature: -4°F to 140°F (-20°C to 60°C)
Humidity: 85% non-condensing
Dimensions (W x H x D):
SCT converter: 0.98 x 4.52 x 4.72 in (25 x 115 x 120 mm)
Weight:
1 lb (0.5 kg)
Rating/Material:
SCT enclosure: NEMA Type 1 plastic pluggable connectors
Warranty:
One-year limited warranty