SSM-LE Series
Operations Manual
Eberle Design Inc.
Page 12
without a minimum clearance time on the solid Yellow Arrow (9, 10, 11,
12). The fault icon (
) will be displayed for the FYA channel (9, 10, 11,
12).
ii. A Clearance fault will be detected if the FYA channel sequences from
the flashing Yellow Arrow (9, 10, 11, 12) to the solid Red Arrow (9, 10,
11, 12) without a minimum clearance time on the solid Yellow Arrow (9,
10, 11, 12). The fault icon (
) will be displayed for the FYA channel (
[9, 10, 11, 12).
iii. If the Clearance function (SSM) is enabled for the solid Green Arrow
channels (1, 3, 5, 7) then a Clearance fault will be detected if the
Green Arrow (1, 3, 5, 7) channel sequences from the solid Green
Arrow (1, 3, 5, 7) to the solid Red Arrow (1, 3, 5, 7) without a minimum
clearance time on the solid Yellow Arrow (1, 3, 5, 7). The fault icon (
)
will be displayed for the solid Green Arrow channel (1, 3, 5, 7).
3.11.2 COMPACT FYAC MODE
The cabinet must be wired such that for each FYA approach, the solid Green protected
Arrow is driven by a load switch monitored on channels 9, 10, 11, and 12. The associated
solid Red Arrow, solid Yellow Arrow, and flashing Yellow Arrow (FYA Overlap phase) must
be driven by a load switch monitored on channels 1, 3, 5, and 7 respectively. The SSM-LE
Series associates channel 1 with 9, channel 3 with 10, channel 5 with 11, and channel 7
with 12, when FYA monitoring is enabled for that respective approach.
Note: Using the Compact FYAc mode allows a standard twelve position load bay to provide
the necessary signals without the addition of load switches for the FYA approaches. This
mode requires that the Controller Unit be capable of remapping the Protected Green Arrow
signal driver to the channel 9, 10, 11, and 12 Yellow load switch inputs. The cabinet must
be (re)wired such that the outputs of the Ped Yellow load switches are monitored by
channels 9, 10, 11, and 12 Green.
If a channel pair is enabled for FYAc operation, the SSM-LE Series will monitor the FYA
logical channel pair for the following fault conditions:
a.
Conflict
i. Channel conflicts are detected based on the Permissive programming
jumpers on the Program Card for each channel. This operation remains
unchanged from normal Nema operation.
b.
Red Fail
i. A Red Fail fault will occur if the solid Red Arrow AND solid Yellow
Arrow AND flashing Yellow Arrow AND solid Green Arrow all remain
inactive for the Red Fail fault response time. The fault icon (
) will be
displayed for both channels of the pair. The Red and Yellow inputs for
channels 9, 10, 11, 12 do not affect the Red Fail condition for the FYAc
channels 1, 3, 5, 7.
c.
Dual Indication
i. A Dual Indication fault will occur if any two or more of the solid Red
Arrow, solid Yellow Arrow, flashing Yellow Arrow, or solid Green Arrow
signal combinations are active simultaneously for the Dual Indication
fault response time. The fault icon (
) will be displayed for the FYAc
channel 1, 3, 5, 7. The fault icon (
) will also be displayed for the solid
Green Arrow channel (9, 10, 11, 12) IF the solid Green Arrow was
active.
ii. If the Dual Indication function (SSM) is enabled for the solid Green
Arrow channels (9, 10, 11, 12) then a Dual Indication fault will occur if
any two or more of the Red, Yellow, or solid Green Arrow inputs (9, 10,
11, 12) are active simultaneously for the Dual Indication fault response
time.
d.
Clearance
