ChemoMetec SP-100 - Manual (Page 13)

Warnings and precautions
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Warnings and precautions
Wherever the symbol appears on the NucleoCounter SP-100 instrument, it indicates
that the manual must be consulted for precautions and warnings.
Power and Cables Power and Cables Power and Cables Power and Cables
Use the shielded USB cable supplied with the NucleoCounter SP-100 to ensure that you
maintain the appropriate EMI classification for the intended environment.
Figure Figure Figure Figure 1 11 1. USB Port & Printer Port
The USB interface connector of the NucleoCounter SP-100 must only be connected to
SELV circuits. External computing devices connected to the USB interface connector of
the NucleoCounter SP-100 has to comply with the standards, UL 1950 and IEC/EN 60950.
Table Table Table Table 1 11 1. Description of the NucleoCounter SP-100 USB interface connector
Pin no. Pin no. Pin no. Pin no. Name Name Name Name
Maximum Maximum Maximum Maximum
Voltage level Voltage level Voltage level Voltage level 1 11 1
1 +5V +5 VDC
2 D- +3.5 VDC
3 D+ +3.5 VDC
4 DGND 0 VDC
Metal
enclosure
Shield
(connected
to DGND)
0 VDC
1 In normal operation mode (refers to Pin no 4)
USB Port
RS-232 Printer Port