Filter
Top Products
Switch on
bit = 0
Switch off
bit = 1
Serial 0 uses SW1 and SW2
Serial 1 uses SW3 and SW4
ON
12345678
8821
F
4
8
123456
ON
021
3
0
000
0
0
SW1
SW2
enable/disable
ON
12345678
8821
F
4
8
123456
ON
020
2
0
000
0
0
SW3
SW4
Factory default setting for Serial 2 --- 02F8 hex (COM2)
ON
12345678
8820
E
4
8
123456
ON
021
3
0
000
0
0
Example: 03E8 hex (typical for COM3)
ON
12345678
8820
E
4
8
123456
ON
020
2
0
000
0
0
Example: 02E8 hex (typical for COM4)
enable/disable
enable/disable
enable/disable
Factory default setting for Serial 1 --- 03F8 hex (COM1)
Figure 6 --- Serial Port base I/O address selection switches
4-2 Quatech Inc.