INFOSEC P2 SunRise 3000 User Manual page 24

 RS-485 card
CN1 is for the function of the terminal resistor. Short pin1-2 to enable the function and short
pin2-3 to disable it.
CN2 is RS485 terminal
1 2 3
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Put the communication card into the slot
Screw back the side & top cover and complete the
installation
1  Ground
2  A/Data+
3  B/Data-