YUNEX TRAFFIC ST950SPlus+, Installation And Commissioning Manual

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ST950S Plus+ Installation and Commissioning Manual
Table 23. Inteligent Detector Backplane Card LEDs
Watchdog LED (LP3)
Software Run
LED (LP2)
Comms Ac­
tive LED (LP1)
State
Off Yellow Yellow Processor Reset
Red Yellow Yellow Watchdog Failure
Off Green Steady Off Performing Start Up
Off Green Flash Red Awaiting Start
Off Green Flash Green Toggle on Re­
ceipt of Message
14
Communications Active
Off Green / Red Alternating Off Invalid Address
Off Red Flash (As above depending
on state) Major Fault Detected
3.14.2. Intelligent Detector Backplane Card Rotary Address Switch
This screwdriver-adjustable switch is located on the Intelligent Detector Backplane card(s) as shown in
Intelligent Detector Backplane Card Rotary Address Switch
(on page 64)
and is set up for the card
address (before the controller is powered up) in accordance with the appropriate Works Specification.
The valid address range is 1 through 9. Address 0 is the default address switch position for spare
cards.
Important:
The address range is shared with the IO cards and must be unique. The address range is
limited to 1 to 9. Addresses 10 and above are used by the CTBs. Due to architecture of Plus
+
this is not expected to be a practical limitation.
3.14.3. Loop Detector Power
The power for the Loop Detector cards is taken from the 24VDC PSU. See Loop Detector Power
(on
page 64) for the power connections on the Intelligent Detector Backplane.
If additional Intelligent Detector Backplanes are required, then the 24VDC can be daisy chained from
the first IDB.
For the purposes of loading the 24VDC PSU has 1.5A available for additional peripherals, outside of
running the ST950 CPU. This would be sufficient for up to 6 intelligent detector backplanes and 1 I/O
Card.
14.
May flash so fast that it looks like Green Steady.
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