JMDM-20DIOV2 single-chip controller has 8-bit high-performance single-chip as the main control chip, 32K program storage space, 16K data storage space, 12 optically isolated digital input, 8 optically isolated digital output, 1 standard RS232 serial communication interface and other features.
The JMDM-20DIOV2 is an 8‑bit high‑performance microcontroller controller featuring 32 KB program memory (expandable to 64 KB) and 16 KB data memory (expandable to 32 KB), optically isolated inputs and outputs, and built‑in watchdog and high‑frequency filtering for stable operation.
The manual details power requirements, I/O specifications, RS‑232 communication, programming via Keil C, mechanical dimensions, environmental limits, typical applications, and ordering information. This manual is written in Chinese.
| Main power supply | 18 V AC or 24 V DC |
|---|---|
| Peripheral driver power | 24 V / 12 V DC |
| Digital inputs | 12 optically isolated NPN inputs, 10 mA each, 2 interrupt‑capable |
| Digital outputs | 8 optically isolated outputs: 4 relay (220 V, 5 A max) and 4 transistor (24/12 V, 4 A max) |
| RS232 interface | 1 standard RS232 port with 15 kV ESD protection |
| Power consumption (no external devices) | +18 V @ 0.5 A (typical) |
| Operating temperature | -10 °C to +65 °C |
| Enclosure dimensions | 145 mm × 90 mm × 40 mm |
The controller can be powered by an 18 V AC main supply or a 24 V DC supply, while the peripheral driver uses 24 V/12 V DC.
It offers 12 optically isolated digital inputs and 8 optically isolated digital outputs (4 relay and 4 transistor).
Yes, programs can be downloaded directly via the RS232 interface without needing a programmer.
Each relay output can handle up to 5 A at 220 V.