Cabletron Systems SEHI-22FL manual Power Supply Requirements

Power Supply Requirements

JAM Output Specifications

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.

Fragment Extension Specifications

Fragments are extended to a minimum of 96 bits using the JAM [1,0].

Fault Protection Specifications

Each segment disconnects 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 resets automatically after one packet is transmitted/received onto the fault protected segment without causing a collision.

3.6POWER SUPPLY REQUIREMENTS

The SEHI has a universal power supply. The input power requirements are listed in Table 3-2.

Table 3-2 Power Requirements

Model	Voltage Range	Frequency Range
SEHI-22FL	100–125 Vac	50/60 Hz
	or 200–250 Vac

The power supply has two outputs of +5 Vdc and +12 Vdc. The maximum output power is 40 W and the minimum efficiency is 65% under all conditions of the line at full load. The minimum and maximum load currents from each output are listed in Table 3-3.

Table 3-3 Power Supply Output Specifications

Output	Min. Load	Max. Load	Max Power
+5 Vdc	0.75 A	4 A	20 W
+12 Vdc	0.00 A	2 A	24 W

SEHI User’s Guide 3-7