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.

Abbreviations used:

gnd  Ground
tx   RS-232 Transmit
rx   RS-232 Receive
rts  Request to Send
nc   No Connection

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.

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