Connection Cables for Mini-PLC. Cables for use with Barth Mini-PLC ‘s. 122-1522 122-1522 USB connection cable for use with STG-115/600 Mini-PLC 122-1523 122-1523 USB connection cable for use with STG-550/570/580/650/680/700 Mini-PLC 122-1524 122-1524 connection cable suitable for Microchip PICkit 3 ; all Open source Mini-PLC 134-8868 134-8868 ARM® Cortex® Mini-PLC connection cable for STG-800/810/820