I ordered an Arduino Opta (RS485 version) and it has arrived – stay tuned for upcoming posts!
In the meantime, I’ve updated my initial review as it has been confirmed that the digital inputs support 24VDC. Programming support for IEC 61131-3 PLC languages has also been clarified (no MacOS support sadly).
| Pros | Cons | Unknowns |
|---|---|---|
| Partnership with Finder | ||
| DIN rail mount | Analogue inputs use 0-10VDC, not “standard” 4-20mA | Can programming be done over Ethernet? |
| IEC 61131-3 PLC language support | I/O expansion options? (What does the “AUX” port do?) | |
| Digital inputs support 24VDC (see here) | ||
| Beefy relay outputs with dedicated commons | ||
| Modbus-TCP and Modbus-RTU support | ||
| Input power supply is 12-24VDC | ||
| IP20 | ||
| -20 °C to +50 °C temperature operating range |