CM4-ETH-RS485-BOX-B (整機套件=外殼+風扇+電源),樹莓派CM4雙網口四路隔離型 RS485擴展板、千兆以太網、USB 2.0、 隔離型RS485 × 4;USB 2.0 × 2;HDMI 接口
資料路徑:www.waveshare.net/wiki/CM4-ETH-RS485-BASE-B