TDI UltraFLEX HD, User Manual

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U L T R A F L E X H D P D U U S E R M A N U A L
3.9.2 LED Indicators & Alarm outputs
LED indicators are provided on the interface PCB for AC available, Main power on, 48V DC on, and power
supply status. LED’s for AC available, Main power on and 48V DC on are also provided on the front of the
PDU. Alarm outputs are also provided for AC available, Main power on and 48V DC on connector J71. Refer
to
Figure 22 for a view of the LED indicators and alarm output connector J71 on the rear of the PDU.
3.9.2.1 Alarm output connector J71
The alarm output connector is J71 and is a 9-pin D-sub connector. These alarm outputs can be used for
external LED’s. Refer to
Table 14 below for the pinout on J71. The alarm outputs are open collectors as
shown in Figure 23 . Logic level for all alarms is TTL high = Normal, TTL low = Fault. The maximum
recommended current through the transistor is 50mA.
Pin Number Signal
1 AC Available
2 Not-Used
3
Main Power On
4 48V DC On
5 Not-Used
6 AC
Available return
7 Not-Used
8
Main Power On return
9 48V DC On return
Table 14 – J71 Pinout
Figure 23 – Alarm output (typical for all alarms)
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