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Aria-34e
Digital Key Telephone System
4.5.24 PFTU
Figure 23 shows the exterior of the PFTU module and how to connect this optional module to the
MBU. This module switches six CO lines to single line telephones directly via the CHAMP
connector during commercial power or processor failure. The test/normal select slide switch
should be on „normal‟ position for normal operation. When switched to „test‟ position, the
PFTU module tests the condition as when there is a commercial power or processor failure. Up
to three(3) PFTUs can be connected to the MBU. The detailed connection method is described in
[Power Failure Transfer Unit Wiring].
To connect PFTU control signal:
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Connect a pair of wires between connector(U41) of the MBU and terminal of
PFTU. Also it is possible to connect a pair of wires from pin#7 and #32 of the
Basic CHAMP connector(CN14), because these two signals are tied together in
the MBU.
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PFTU is not sensitive to polarity of control signal.
Connecting Wire
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AWG #22 ~ AWG #26 (diameter : about 0.6mm ~ 0.4mm)
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Length : Max. 10 meters - 1 m ~ 1.5 m (recommended)
Aria Communications Pty Ltd.
A.C.N. 090 723 925
Figure 22. PFTU-I INSTALLATION
4-26
Installation
Rev 1.3
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