ChemoMetec NC-200 - Manual (Page 13)

Warnings and precautions
991-0203 Rev. 1.1 Sep. 2012 xiii
Warnings and precautions
Whenever the symbol appears on the NucleoCounter NC-200 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 NC-200 to ensure that
appropriate EMI classification is maintained for the intended environment.
The USB interface connector of the NucleoCounter NC-200 must only be connected to
SELV circuits. External computing devices connected to the USB interface connector of the
NucleoCounter NC-200 have to comply with the standards, UL 1950 and IEC/EN 60950.
Table 1 Description of the NucleoCounter USB interface connector
NucleoCounter NC-200 is powered by an external 24VDC power supply. For safe use,
please follow the instructions for connecting the power supply.
The NucleoCounter NC-200 shall only be used with an external power supply purchased
at ChemoMetec A/S.
The detachable DC power supply cord set and appliance inlet of the external power
supply are considered as the disconnecting device.
The mains supply cord and plug of the external power supply shall comply with any
national regulations.
The user should be made aware of that, if the NucleoCounter NC-200 and the external
power supply are used in a manner not specified by the manufacturer, the protection
provided by the NucleoCounter NC-200 and the external power supply may be impaired.
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