| Model |
ST-2401 |
| Input Section |
| Input Signal |
1 Channel, Load Cell / Strain Gauge Signal |
| Bridge Resistance |
120Ω / 350Ω, Bridge Excitation Voltage: 2.5V / 5.0V / 10.0V (±7%) |
| Measuring Range |
±5.1mV/V (ADC Resolution: 60,000 or higher). Operation matching reference specs below:
・Span adjustment range: 1 to 4mV/V
・External shunt calibration range: covers 40% to 100% (Factory default: 80%)
・Zero adjustment range: -100% to 25% of F.S. |
| Min. Input Sensitivity |
1μV/digit (Bridge voltage 5V), 2μV/digit (Bridge voltage 10V) |
| Measuring Accuracy |
±(0.1% of F.S. + 1 digit) @23℃, 35-85% RH *At sampling rate of 20 times/sec or less |
| Temperature Characteristics |
Zero: 0.02% of F.S./℃, Span: 0.02% of F.S./℃ |
| Sampling Rate |
1000 times/sec *ΔΣ AD conversion method |
| Sensor Power Output |
2.5V / 5V / 10V / Custom specified voltage [Selectable model type] |
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| Calculation Section |
| Operation Method |
ΔΣ Integration Method |
| Moving Average |
1 - 99 |
| Control Input |
Standard or optional (depending on model) |
| (Functions) |
Configure functions for each control input (CTL) terminal to execute external controls.
[Functions] Hold (Current, Max, Min, Peak-to-Peak), Zero Shift, Span Shift, Zero Set, Span Set
[Active Logic] Normally Open (N.O.), Normally Closed (N.C.) |
| (Operation Method) |
Reflects configuration when the control input (CTL*) terminal is shorted (or opened) to GND depending on the active logic setting. |
| (Data Comms) |
Supports command controls via serial communication (USB, CAN, RS-485) *Commands set via communication cannot be cleared by terminal input. A hardware reset execution is required. |
| Control Input Response |
Configurable response filter time (1ms to 1999ms) |
| Control Input Backup |
Enable or disable value non-volatile backup during Shift or Set operations (retains data even after power cycle). |
| Configuration Memory |
Non-volatile memory (EEPROM) |
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| Display Section |
| Digital Indicator |
5-digit, 7-segment LED, Character Height: 9mm. ST-2401: Red LED / ST-2401-G: Green LED (Option)
Display Range: -19999 to 99999. Polarity: "-" lights up during reverse rotation.
Over-range: "OL". Zero Display: Leading zero suppression.
Display Update Rate: 0.3 sec (configurable from 0.1 to 9.9 sec). Display Accuracy: 20ppm ±1 digit @23℃ |
| Decimal Point Position |
Programmable configuration via setup mode. 0: □□□□□, 1: □□□□.□ to 4: □.□□□□ |
| Status Indicator |
1 LED, assignable from Power status or Control Input status. |
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| USB Communication Section |
| USB Comms Spec |
USB 2.0 (Serial port emulation via USB Virtual COM, 230.4kbps) |
| USB Comms Functions |
Read/Write configuration parameters, continuous measurement data streaming |
| Output Update Rate |
1ms - 9999ms (configurable in 1ms increments) |
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| General Specifications |
| Operating Temp/Humidity |
-10℃ to +50℃, 35 to 85%RH (non-condensing) |
| Power Supply Voltage |
7-60V DC, reverse polarity protection included. Power delivery from USB host: 5V |
| Power Consumption |
3W or less |
| Isolation |
Between power supply, voltage input, and other inputs/outputs |
| Dielectric Strength |
500V DC for 1 minute between the isolated terminals listed above |
| Weight |
Approx. 60g |
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| CAN Option |
| Communication Spec |
CAN 2.0B, Baud rates: 10k / 20k / 50k / 100k / 250k / 500k / 1M bps. Format (INTEL / MOTOROLA), Frame (11-bit / 29-bit) |
| Communication Functions |
Read/Write configuration parameters, continuous measurement data streaming |
| Configurable Items |
CAN Tx ID, CAN Rx ID |
| Output Update Rate |
1ms - 9999ms (configurable in 1ms increments) |
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| RS-485 Option *Please consult us for Modbus RTU support as well |
| Max Nodes |
32 units (max) |
| Connection Type |
2-wire multi-drop serial communication |
| Transmission Mode |
Asynchronous |
| Comms Standard |
RS-485 |
| Baud Rate |
9600bps / 19200bps / 38400bps (programmable configuration) |
| Data Format |
Start bit: 1-bit / Stop bit: 1-bit / Data length: 8-bit / Parity: None |
| Protocol Code |
ASCII |
| Communication Functions |
Read/Write configuration parameters, measurement data response upon command request |
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| Analog Output Option |
| Output Signals |
[E1] 0 - 10V [E5] 0 - 5V [R1] ±10V [R5] ±5V [I1] 4 - 20mA [Selectable model type] |
| D/A Conversion |
DAC method |
| Output Resolution |
16-bit (50,000 or higher) |
| Load Resistance |
Voltage output: 4.7kΩ or higher / Current output: 300Ω or lower |
| Output Accuracy |
Voltage output: ±0.1% of F.S. @23℃ / Current output: ±0.1% of F.S. @23℃ |
| Temperature Drift |
±200ppm/℃ or less |
| Output Scaling |
Arbitrary scaling available via Full-scale and Zero-scale configurations |
| Output Update Rate |
1ms - 9999ms (configurable in 1ms increments) |
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| Comparator (Alarm) Output Option |
| Setup Method |
Configurable via program mode |
| Output Points |
2 points / 4 points (depending on model type conditions) |
| Output Form |
Isolated solid-state relay (PhotoMOS relay), non-polarized. When comparator condition is active (ON), resistance between COMP and COM is 50Ω or less. |
| Output Load Voltage |
Peak AC/DC 280V, 100mA (resistive load), Max ON resistance: 50Ω or less |
| Output Logic |
Signed comparative evaluation (0 is greater than minus value)
| [High/Over] |
ON when value is equal to or greater than the setting value |
| [Low/Under] |
ON when value is equal to or less than the setting value |
| [In-Range] |
ON within the configured range, OFF outside the range |
| [Out-of-Range] |
ON outside the configured range, ON within the range |
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| Update Rate |
Based on analog output update rate configuration. Response time: 1ms (max) |
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ST/STL-24 utilizes a 2-tier connector system.
PC Configuration & Logging
