67XXU USB/Serial Scale Service Manual
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Table 2.3 USB Connector (USB) Com 1
Table 2.4 RS-232 Port Connector (SIO) Com 2
Table 2.5 CAL Jumper Set
Pin
Description
In/Out/Power
Electrical Level
1
GND of VDD
power ground
0 VDC
2
USB D+
0-5 VDC
3
USB D-
0-5 VDC
4
USB power
power input
5±0.25 VDC
Pin
Description
In/Out/Power
Electrical Level
2
RS-232 transmit on UART0
Output
-12 to +12 VDC
3
RS-232 receive on UART0
Input
-12 to +12 VDC
5
GND
Power ground
0 VDC
Connected Pins
Function
Push
calibration enabled
No push
calibration disabled