Mobility, Intelligent Traffic Systems
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(As above
depending on state)
* - May flash so fast that it looks like Green Steady.
Table 8 – Intelligent Detector Backplane Card LEDs
Conditions other than those identified above should not occur and can be treated as
faults.
4.11.2 Intelligent Detector Backplane Card Rotary Address Switch
This screwdriver-adjustable switch is located on the Intelligent Detector Backplane
card(s) as shown in Figure 23 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 15 (where A to F denote 10 to 15
respectively). Address 0 is the default address switch position for spare cards.
The address range is shared with the I/O cards and must be unique.
4.11.3 Loop Detector Power
The power for the Loop Detector cards is taken from the 12-way Loop Detector
Supply Terminal Block TBZ on the side termination panel or from a separate -24V
DC supply. See Figure 24 for the power connections on the Intelligent Detector
Backplane.
The Loop Detector Supply Termination Block TBZ is powered from the HPU and is
capable of supplying a maximum of 2.8A at -24V DC for above ground detectors
and Loop Detector Cards.
If the total current drawn by the Loop Detector Cards and above ground detectors
exceeds 2.8A, then an additional power supply kit must be fitted into the cabinet.
Both 50VA and 160VA DC kits are available. See the ST950 Family General
Handbook.
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