W-NXS AND CP-NXS
74-4059—01
16
Connecting the 24 Vdc Supply
Caution
Before powering the NXS, note the following:
•
Use only the special connector plug supplied with the unit to connect supply voltage.
•
The device should only be connected to a 24Vdc power supply that satisfies the requirements of safe
extra low voltage (SELV).
•
When the device is operated on a wall, in an open rack, or other similar locations, an NEC Class 2 current
source must be used for UL requirements (in accordance with UL 60950-1). In all other cases, in
accordance with IEC / EN / DIN EN 60950-1, it is necessary to use either a power source of limited
performance (LPS - Low Power Source), or use a line-side fuse or line-side power switch. Power needs
to be limited to less than 8 A. The recommended fuse rating is 4 A.
For operation in closed cabinets or fireproofing cabinets (including the operation of a cabinet in accordance with UL508),
there are no requirements for current limiting of supply voltage.
Note
If the NXS uses a CompactFlash card, make sure that the card if properly seated before powering the unit.
See
on page 3 for location of the CompactFlash card cover.
provides instructions for connecting the 24 Vdc power supply.
