Doc. Title
Author
Page of Pages
ST300/340 OPERATION MANUAL
– LATAM
HG.Park
124 of 146
Concerning
Doc. No.
Rev.
Date
Features and How to set parameters
1.41
26 May. 2015
Suntech International Ltd.
Confidential Document
4-pin Event line
WHT
pin 1
RS232_DRX ( option; Audio_mic)
option
GRN
pin 2
RS232_DTX (option; Audio_speaker)
option
BRN
pin 3
Power for external (DC4.9V or 12V)
option
BLK
pin 4
Ground
FIX wire
Option1 and Option2 lines can be selected out of the types (which are shown in the Figure above) by changing the
circuit of the connection made in the factory.