Safety Information and Notices
150-359-100-01, Revision 01
iv
October 27, 2000
HXU-359 List 1
S
AFETY
I
NFORMATION
AND
N
OTICES
Electrical Rating and Insulation
On-board Overcurrent Protector
Thermal Insulation
Telemetry I/O
The card power input is rated –40 to –57.5 Vdc, 0.37 to 0.27 A.
The power supply feeds must be either (1) -48 Vdc SELV
sources or (2) -48 Vdc sources that are both electrically
isolated from the AC sector and reliably connected to earth.
This card is a Class III device; no safety insulation is provided
between various parts of the circuit.
The card is provided with a fuse in the main –48 Vdc path. The
time delay type fuse ( F1 ) is rated 2 A, 125 V, and is
CSA-certified and UL-recognized.
The card safety evaluation is based on a maximun ambiant
temperature of 85°C, with natural convection cooling. Some
parts may be hot and not suitable for body contact.
The telemetry I/O must be connected to either a SELV source
or a ELV source that is electrically isolated from the AC sector
and reliably connected to earth.
The electrical rating of the telemetry output is 57.5 Vdc,
30 Vac, 250 mA for the dry contact type, and 57.5 Vdc, 100 mA
for the open collector type.
