Advertisement
4
Jumper Settings
7404
The following diagrams illustrate the jumper settings for the 7404 Motherboard.
Default settings are shown.
Powered RS-232 Ports (COM3 – COM4)
COM3/COM4 - JP3
1
12
Pin 1 - 2
COM3 Ring Indicator
COM3 +5V
Pin 3 - 4
Pin 5 - 6
COM3 +12V
Pin 7 - 8
COM4 Ring Indicator
COM4 +5V
Pin 9 - 10
Pin 11 - 12
COM4 +12V
23842
Advertisement
