ADLINK C485 User Manual
Page 35
Connectors
• 23
4.1.3 DB25 Connector Pin assignment - C825M/C425M
=======================================================
DB25 Pin Number | RS232 Signal | RS422/485 Signal
=======================================================
2 | TXD (Out) | TXD+ (Out)
-------------------------------------------------------
3 | RXD (In ) | RXD+ (In )
-------------------------------------------------------
4 | RTS (Out) | ---
-------------------------------------------------------
5 | CTS (In ) | ---
-------------------------------------------------------
6 | DSR (In ) | RXD- (In )
-------------------------------------------------------
7 | GND | isolated GND
-------------------------------------------------------
8 | DCD (In ) | ---
-------------------------------------------------------
20 | DTR (Out) | TXD- (Out)
=======================================================
4.1.4 DB9 Connector Pin assignment - C809M/C409M
=======================================================================
DB9 Pin Number | RS232 interface Signal | RS422/485 interface Signal
=======================================================================
1 | DCD (In ) | ---
-----------------------------------------------------------------------
2 | RXD (In ) | RXD+ (In )
-----------------------------------------------------------------------
3 | TXD (Out) | TXD+ (Out)
-----------------------------------------------------------------------
4 | DTR (Out) | TXD- (Out)
-----------------------------------------------------------------------
5 | GND | isolated GND or GND
-----------------------------------------------------------------------
6 | DSR (In ) | RXD- (In )
-----------------------------------------------------------------------
7 | RTS (Out) | ---
-----------------------------------------------------------------------
8 | CTS (In ) | ---
-----------------------------------------------------------------------
9 | RI (In ) | ---
=======================================================================
NOTE: 1. The C485 card will support 4 isolated RS422/485 interface
ports. Each port has an isolated GND.
2. The C588 card does not support RI signals.
3. The C232 card supports two RS232 interfaces.
4. The C422 card support two isolated GND RS422/485 inter-
faces.
5. TB485 converters can convert DB9 connector to 3 pin terminal
blocks for RS485 applications.