User Manual

AirLink Pro T1/E1 Rack Mount Installer’s Guide
Specifications
Rev. B - 1/97
B-4
Table B-1
Power
Input Voltage 21 to 56 VDC
Input Power 25 Watts (Maximum)
Input Current 1.0 Amps @ 24 Volts
500 Ma @ 48 Volts
Input Polarity Input is floating. Either input may be
grounded.
Input Protection Nominal fuse = 2.0 A Slow Blow
Input Reverse
Voltage Protection
Provided. Series diode. No current will flow if
the input voltage is reversed.
NOTE No internal fusing is provided, because to do so would violate the specifications of
UL1459 section 70. (No fusing is allowed in the grounded side of a DC input circuit unless
the hot side is also fused.) When the fuse in the hot side blows, the fuse in the grounded
input must also blow. Since this equipment accepts either polarity, external circuit
protection must be provided in the hot side of the feeder circuit.
Interface Specifications
This section contains specifications for the two major interfaces of the AirLink
Pro T1/E1 Rack Mount:
❚ T1/E1 DTE interface
❚ Radio interface