Serial
input/output
table - J3
Input/Output
Pin
Number
Explanation
+5V Return/
Shield
J3-1
Common/shield - serial port interface.
Txd 232
J3-2
RS-232 transmitter output (from 5645).
Rxd 232
J3-3
RS-232 receiver input (to 5645).
+5 V dc
J3-4
5 volt dc output
Note: The total 5 Vdc current from pins J3-4,
J6-8 and J7-7 must be less than 450 mA.
+5 V Common
J3-5
Common - serial port interface.
Txd (+) 485
J3-6
RS-485 transmitter output (from 5645).
Txd (-) 485
J3-7
Rxd (+) 485
J3-8
RS-485 transmitter input (to 5645)
Rxd (-) 485
J3-9
2 - 20
5645 Installation and Hardware Manual
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