Testing; Testing A Firefinder-Xls / Fs-250 / Fc20; Fc922, Fc924, Fc901) Loop - Siemens DPU User Manual

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Testing

Testing a FireFinder-XLS / FS-250 / FC20 (FC2025, FC2050, FC2005,
FC922, FC924 or FC901) Loop
The DPU may be used to test FireFinder-XLS / FS-250 /
FC20 (FC2025, FC2050, FC2005, FC922, FC924, FC901)
loops before the system is connected. The DPU checks
that all of the devices are communicating and also
checks for ground faults and short circuits. By using the
loop test feature, all troubles can be cleared from the
device loop before it is connected to the panel.
The loop test menu is available only when the system is set
for FireFinder-XLS / FS-250 / FC20 (FC2025, FC2050, FC2005,
FC922, FC924, FC901) and it operates only when the DPU is
powered from AC.
Be sure to disconnect the wire between the device and/or
detector loop and the system before performing the loop test.
Follow the procedure below to test a loop of FireFinder-
XLS / FS-250 / FC20 (FC2025, FC2050, FC2005, FC922,
FC924, FC901) detectors and devices.
• Connect the DPU to an AC wall outlet using the
external power supply provided. (See Figure 1, page
2, for location of External Power Connector.)
• Connect the loop drive cable P/N 555-133891 to the
loop to be tested and connect the ground connec-
tion cable P/N 555-133920 to a valid ground, as
shown in Figure 3, page 28. (The ground connection
is needed only to test for ground faults.)
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TESTING