EXT3740 is an expansion board that extends DB37 or IDC40 connector signals to the board for easy user wiring.
The EXT3740 is a signal expansion board that allows users to extend signals from a DB37 or IDC40 connector to the board itself, simplifying wiring. It supports two input methods: a DB37 connector (also called D‑type 37‑pin) and an IDC40 flat‑cable connector.
When wiring, users must choose one connector type and must not connect both simultaneously. The DB37 connector is keyed to prevent incorrect insertion, while the IDC40 connector can be miswired, so extra care is required to avoid reversing the pins. This manual is written in Chinese.
No, the board cannot have both connector types connected simultaneously.
When wiring the IDC40 connector, be careful not to reverse the connections.