Farallon Communications NetopiaTM - Manual (Page 58)

58 Appendix A
Proximity to Hazardous Voltages
This information is provided for the benefit of manufacturers of PCs which include
a PC Card slot. Users should verify that their PC has been constructed in
accordance with the following guidelines.
In order to comply with safety regulations there must be adequate separation
between Netopia ISDN PC Card and adjacent modules.
Except at the edge connector which plugs into the host's expansion slot, minimum
clearance and creepage distances must be maintained between Netopia ISDN PC
Card and other par ts of the host, including other installed cards. Clearance is the
shor test distance between two points measured directly through the air. Creepage
is the shor test distance between the same two points measured along sur faces.
The minimum clearance and creepage distances var y according to the voltage
level present in the host PC or in cards installed in it. These figures are listed in
the following table.
The creepage distances apply when installed in a normal office environment. The
creepage distances shown in parentheses apply where the local environment
within the PC is subject to conductive pollution or dr y non-conductive pollution
which could become conductive due to condensation.
Voltage used or generated by other parts of
the host or expansion card Vrms or Vdc Clearance
mm Creepage
mm
up to 50 2.0 2.4 (3.8)
up to 125 2.6 3.0 (4.8)
up to 250 4.0 5.0 (8.0)
up to 300 4.0 6.4 (10.0)