How to Make Cables
RS232 DB9 Cable
RS422 DB9 Cable
Twisted-pairs is recommended for RS422 connection.
Modem DB9 Cable
Use this cable to connect the modem with the sign. Do not use this cable to connect the modem with PC.
Modem DB25 Cable
Use this cable to connect the modem with the sign. Do not use this cable to connect the modem with PC.