
32 
S
CANNER AND 
C
ABLE 
T
ERMINATIONS
MS1890-38, Low Speed USB 
Pin  Function 
1 Ground 
2 RS232 Transmit Output 
3  RS232 Receive Input 
4 RTS Output 
5 CTS Input 
6 USB D+ 
7 V USB 
8 USB D- 
9 +5VDC 
10 Shield Ground 
MS1890-40, Full Speed USB 
Pin  Function 
1 Ground 
2 RS232 Transmit Output 
3  RS232 Receive Input 
4 RTS Output 
5 CTS Input 
6 USB D+ 
7 V USB 
8 USB D- 
9 +5VDC 
10 Shield Ground 
Figure 15.