How do I change the communication protocol for a port on the SSRENG-7404 card?

The SSRENG-7404 Four Port NMEA Serial Interface Card allows the PC-RP to communicate with up to four NMEA Devices. Both RS-232 and RS-422 communication is supported. These interfaces can be used to connect NMEA devices such as: Speedlog, SIU, DGPS, Gyro Compass, etc.

Four Port Serial Card

The SSRENG-7404 comes configured for RS-422; however each port can be individually configured for either RS-422 or RS-232. The protocol is determined by the DIP-Shunts identified by S1-4 the figure.

Port 1 is controlled by the bottommost DIP-Shunt Set and Port 4 is the uppermost DIP-Shunt Set. If a port’s DIP-Shunt is located in the top socket then it is configured for RS-422; if the DIP-Shunt is located in the bottom socket then it is configured for RS-232. Sockets E2, E4, E6 and E8 configure RS-232 and sockets E1, E3, E5 and E7 configure RS-422.