ChemoMetec NucleoCounter, User Manual

Page: 14 / 76

Warnings and precautions
xiii
Warnings and precautions
Wherever the symbol appears on the NucleoCounter instrument,
it indicates that the manual must be consulted for precautions
and warnings.
Power and cables
Use the shielded USB cable supplied with the NucleoCounter to
ensure that you maintain the appropriate EMI classification for
the intended environment.
The USB interface connector of the NucleoCounter must only
be connected to SELV circuits. External computing devices
connected to the USB interface connector of the NucleoCounter
has to comply with the standards, UL 1950 and IEC/EN 60950.
Table 1 . Description of the NucleoCounter USB interface
connector
Use the shielded printer cable supplied with the NucleoCounter
to ensure that you maintain the appropriate EMI classification
for the intended environment.
The printer interface connector of the NucleoCounter must
only be connected to the printer supplied by ChemoMetec A/S.
External computing devices connected to the printer interface
connector of the NucleoCounter has to comply with the
standards, UL 1950 and IEC/EN 60950.
1
In normal operation mode (refers to Pin no 4)
Pin no. Name
Maximum
Voltage level
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