10
FALLBACK SWITCH AND LOOPBACK SWITCH
3. Installation
3.1 Inspection
Check the unit for possible shipping damage. Notify Black Box immediately if the
unit is damaged, and save the packing material and shipping container for
equipment return.
Located on the rear of each unit is a power connector and an 8-pin modular
jack. The Fallback Switch has three data connectors (“A,” “B,” and “Common”)
while the Loopback Switch has only two data connectors (“A” and “Common”).
RS-232/V.24 and RS-530 signaling use DB25 connectors, and V.35 signaling uses
34-pin M-series connectors.
3.2 Power Requirements
These Switches are intended for use when powered by an internal power supply.
Other use may invalidate any approvals given to the system. Standard AC voltage is
100-120 V for A models, and 200-240 V for AE models.
CAUTION
For continued protection against risk of fire, replace the fuse with one of
the exact same type and rating. The 100-120 V fuse is 0.100 A, 250 VAC,
slow-blow, and the 200-240 V fuse is 0.200 A, 250 VAC, slow-blow.
NOTE
Since the colors of the cores in the mains lead of this equipment may
not correspond with the colored markings identifying the terminals in
your plug, proceed as follows if you need to replace the plug:
• The core that is colored green and yellow must be connected to the
terminal in the plug that is marked with the letter “E” or by the earth
symbol, or colored green and yellow.
• The core that is colored blue must be connected to the terminal that is
marked with the letter “N” or colored black.
• The core that is colored brown must be connected to the terminal that
is marked with the letter “L” or colored red.
3.3 Disconnect Device
To disconnect the switch, pull out the plug on the power supply.
