Technical data

Requirements for European Operation
116273-B Rev 00
D-9
Power Requirements for ISDN BRI and Serial Adapter
Modules
The ISDN BRI and serial adapter modules obtain power from the host chassis and
have the power requirements shown in Table D-9
.
The power drawn from the host chassis combined with the power required for any
other modules and accessories must be within the power rating of the host chassis.
When you install an ISDN BRI or serial adapter module in an ARN/DC, make
sure that you do not impair the integrity of the network protection from hazardous
voltages used or generated internally by the host chassis.
Clearance and Creepage Distances for ISDN BRI and Serial
Adapter Modules
The clearance and creepage distances (shown as X and Y, respectively) in
Figure D-4
and Table D-10 must be maintained between the module and:
• The host chassis in which it is installed
• Any adjacent modules installed in the host chassis
The exception to this rule is the edge connector, which resides in the host chassis
backplane, where no minimum distance applies.
Creepage distances apply to the normal office environment. When the local
environment within the host chassis is subject to conductive pollution or dry
nonconductive pollution that could become conductive due to condensation, the
creepage distances shown in parentheses in Table D-10
apply.
Table D-9. ISDN BRI and Serial Adapter Module Power Requirements
Voltage Amperage
+5 V 1 A
+12 V 0.15 A
-12 V 0.15 A