Specifications
ST900 Family General Handbook
667/HB/32900/000 Issue 11 Page 253 of 265
green commands PAR and PIT are stream-based so the same timings would be
applied to both vehicle phases. The puffin and toucan pedestrian to vehicle inter-
green is controlled by the pedestrian phase’s clearance period which would
automatically delay the appearance of all conflicting vehicle phases (as it does on
an intersection). The IGN inter-green times for the phases on the stand-alone
pedestrian stream are not used.
38.3.3 Using Different LSLS Outputs (ST900 ELV only)
With the ST900 ELV Controller, each phase aspect can be assigned to more than
one LSLS Output and each LSLS Output can be monitored by a different Lamp
Monitor Sensor. Therefore, two LSLS Outputs can be configured for each aspect of
a phase and then, on the IC4 Lamp Monitor Screens, a different sensor can be
assigned to the second LSLS Output of each RAG aspect of that phase.
In the example below, two LSLS Outputs have been configured for each RAG
aspect of Phase F so the phase uses six LSLS Outputs rather than three. By default
IC4 will still configure each of those LSLS Outputs to be monitored by Lamp Monitor
Sensor 6. However, the Lamp Monitor Sensor for the second LSLS Output of each
RAG aspect can be manually changed from Sensor 6, to any spare sensor. In this
example, Sensor 33 has been used.
5
RLM
LMU
7
LMU
7
LMU
F
E
G
RLM
Approach 1
RLM
Approach 2
Last Phase
of the
Intersection
6
RLM
LMU
33
RLM
LMU
R 5
A 5
G 5
R 7
A 8
G 7
G N/A
8
LMU
(Monitored Green Output for Green Man Signals)
(Un-Monitored Green Output for Audible/Tactile Units)
(Monitored Amber Output for Demand Indicators)
R
6
R
33
A
6
A
33
G
6
G
33
(Monitored Red Output for Red Man Signals)
Figure 48 – RLM Approaches (Different LSLS Outputs)
Thus, Sensor 6 will count the red lamp failures on Approach 1, while Sensor 33 will
independently count the red lamp failures on Approach 2. This has two significant
advantages over the other options:
1) External sensors are not required since this mapping is handled internally
by
the firmware in the LSLS Cards and the Main Processor.