Key facts
- Manuals
- 1
- Languages
- ZH
- Last added
- 2012-02-28
Featured EXT3740 manuals

EXT3740 User Manual
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.
Covers: Purpose of the EXT3740 · Connector Types · Pin Definitions · Wiring Guidelines · Precautions
Latest EXT3740 manuals
EXT3740 User Manual
User Manual 2 pages · 305 KB · ZHThe EXT3740 manual explains how to connect DB37 or IDC40 connectors to the signal expansion board.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in EXT3740 manuals
Can I use both DB37 and IDC40 connectors at the same time?
No, the board cannot have both connector types connected simultaneously.
From: EXT3740 User Manual
What must I avoid when wiring the IDC40 connector?
When wiring the IDC40 connector, be careful not to reverse the connections.
From: EXT3740 User Manual
