67XXU USB/Serial Scale Service Manual 19
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
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