GarrettCom P62 User Manual
Page 30
Magnum P62-Series Hardened Switches Installation and User Guide (05/05)
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* Note: The use of either multi-mode or single-mode fiber to operate at 100Mbps speed over long
distances (i.e., over approx. 400 meters) can be achieved
only
if the following factors are
both applied:
•
The 100Mb fiber segment must operate in full-duplex (FDX) mode, and
•
The worst-case OPB of the fiber link must be greater than the fiber cable’s passive
Attenuation.
(Attenuation = Cable loss + LED aging loss + Insertion loss + safety factor)
3.2.6
Connections to NICs which support Auto-Negotiation, RJ-45 ports
The copper ports of Magnum P62-Series Hardened Switches will function properly with
NICs (Network Interface Cards) which support Auto-Negotiation, and the Fast Link Pulse (FLP)
coding for the 100BASE-TX signaling system. When connecting a NIC to a P62, it may be
necessary to reload the NIC drivers on the user device if the NIC has been communicating with a
protocol other than 100BASE-TX (such as 10BASE-T). When 100Mb speed is agreed and in use,
the 10/100 LED is steady ON. It is OFF if there is no traffic or if 10 Mbps traffic.
3.3
Powering the Magnum P62-Series Hardened Switch
3.3.1
Power P62F and mP62 models, for –48V and 24V DC pwr input
Each Magnum Model P62-Series Hardened Switch requires a DC power source, from 20-
60VDC. The wide range of power input qualifies this product for use both in 24VDC as well as -
48VDC environments. The 24VDC or -48VDC power input provides an Ethernet networking
product utilizing a special type of power supply with a proven high-reliability record.
DC Power Terminals: “+”, “
-
”
,
internally
floating
GND: Terminal for “earth” or ground wire
connection to the P62 chassis
Input Voltage: 20 to 60 VDC
Input current: 0.7 amp max.
Power Consumption: 10 watts typical
P62 -48V, 24VDC INSTALLATION
This section describes the proper
connection of the -48VDC leads (or 24VDC
leads) to the DC power terminal block on
the Magnum P62 Switch (as shown in
Figure above)
The DC terminal block on the Magnum P62-Series Hardened Switch is located on the left front of
the unit and is equipped with three (3) screw-down lead posts. The power terminals are identified
as positive (+) and negative (-), and they are floating inside the unit so that either may be
grounded by the user if desired. The chassis is “earth” or ground (GND).