Module Isolation
Table D–3 Clearance and Creepage Distances
Clearance
(Xmm)
Creepage
(Ymm)
1
Voltage Used or Generated by Other
Parts of the Host or Expansion Card
(Vrms or Vdc)
2.0 2.4 (3.8) Up to 50
2.6 3.0 (4.8) Up to 125
4.0 5.0 (8.0) Up to 250
4.0 6.4 (10.0) Up to 300
1
The distances shown in parentheses apply in an uncontrolled environment
where heat, humidity, and temperature may fluctuate.
Safety Status
All interconnection points on this product are either TNV and/or
SELV circuits and should only be connected to products with like
circuits.
• Asynchronous/Synchronous Communication Port - TNV
/SELV
• ISDN Port - TNV (Not currently supported)
• All other ports - SELV
Cable Approval
Cable
Connection to
Digital Circuits
The 54-21813 module is approved for direct connection
to a particular digital circuit. This approval includes an
interconnecting cable with mating connectors that conform to
the British standard BS6623, parts 1 and 4. If the module
is connected to the service with anything other than its own
approved cables, those cables must benefit from relevant
Special Information for PTT Network Users D–5
