Enabler Card DB25 Pinouts

The following diagram shows the connections on the Enabler Card DB25 connector. See also: Enabler LEDs

This diagram is looking at the Enabler card socket, or at the back of a DB25 plug.

Except for the passive (RS-485/IFSF), FDMs are always connected to the RS-232 ports. Most do not use the RTS signal.

Note that there are only 3 RS-485 ports. Port 4 can only be used for RS-232.

Abbreviations used

GND  Ground
 TX  RS-232 Transmit
 RX  RS-232 Receive
RTS  Request to Send
 nc  No Connection

For one port, you can only use either RS-485 or RS-232 connection, not both.