Apollo ESP6000 Manual Do Utilizador

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User’s Manual 
 
ECM-3612 User’s Manual 
 
33
 
2.3.7.3  Serial Port 2 Connector in RS-485 Mode 
 
 
Signal
PIN PIN 
Signal 
DATA-
1
NC 
DATA+
3
4 NC 
NC 
5
NC 
NC 7
8 NC 
NC 
9
10 
NC 
 
 
2.2.7.3.1 Signal  Description – Serial Port 2 Connector in RS-485 Mode (CM4) 
Signal 
Signal Description 
DATA +/- 
This differential signal pair sends and receives serial data to the communication 
link.  The mode of this differential signal pair is controlled through the RTS 
register of Serial Port 2.    Set the RTS register of the Serial Port 2 to LOW for 
transmitting, HIGH for receiving.