The Yamatake SDC40A Digital Indicating Controller is a high-precision compact device that can measure and control various types of inputs, such as thermocouple, RTDs, and DC voltage/currents. It features a 5-digit indicator, an input sampling cycle of 100 ms, and an indication accuracy of ±0.1% FS ±1U[^1^]. It also has various functions, such as PID control, alarm output, ramp/soak control, and communication interface.
This manual describes the Yamatake SDC40A Digital Indicating Controller, a compact high‑precision device that measures and controls thermocouples, RTDs, and DC voltage/current signals. It explains the hardware features, wiring, and basic operation steps.
The guide covers configuring input types, selecting control modes (ON/OFF, PID, manual), setting alarm outputs and ramp/soak functions, and using the communication interface (RS‑232C/RS‑485) for data exchange with PCs or other controllers.
| Indicator digits | 5‑digit |
|---|---|
| Input sampling cycle | 100 ms |
| Indication accuracy | ±0.1 % FS ±1U |
| Communication protocols | RS‑232C, RS‑485 |
| Alarm outputs | Up to 4 |
| Ramp/soak segments | Up to 8 |
The controller offers ON/OFF control, PID control, and manual control modes.
You can configure up to four alarm outputs with different types and levels.
It supports RS‑232C and RS‑485 protocols and can act as master or slave.