Cabletron Systems HubSTACK SEHI-34 User Manual page 32

INSTALLATION REQUIREMENTS/SPECIFICATIONS
JAM Output:
Fragment Extension:
Fault Protection:
POWER SUPPLY REQUIREMENTS
Note: The SEHI has a universal power supply. This unit allows you to
use an input power from 90 to 264 VAC, 47-63 Hz.
The power supply has two outputs of +5 volts and +12 volts. The
maximum output power is 40 watts and the minimum efficiency is
65% under all conditions of line at full load. The minimum and
maximum load current from each output is shown below.
Output Min. Load
+5 Volts 0.75 Amps
+12 Volts 0.00 Amps
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Collisions are propagated
through the network using the
JAM signal of an alternating
pattern of 1's and 0's in
accordance with 802.3
specifications for a repeater unit.
Packet fragments are extended to
a minimum of 96 bits using the
JAM [1,0].
Each segment will disconnect
itself from the other segments if
32 consecutive collisions occur, or
if the collision detector of a
segment is on for longer than
approximately 110 s. This fault
protection will reset
automatically after one packet is
transmitted/received onto the
fault protected segment without
causing a collision.
Max. Load
4 Amps
2 Amps
Max Power
20 Watts
24 Watts