MMU-16LE
SmartMonitor
Operations Manual
Eberle Design Inc.
Page 20
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.
If a channel pair is enabled for FYAc operation, the MMU-16LE
SmartMonitor
®
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 13, 14, 15, 16 do not affect the Red Fail condition for the
FYAc channels 13, 14, 15, 16.
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 (13, 14, 15, 16) IF the solid Green Arrow was
active.
ii. If the RG, RY, or GY Dual Indication function is enabled for the solid
Green Arrow channels (13, 14, 15, 16) then a Dual Indication fault will
occur if any two or more of the Red, Yellow, or solid Green Arrow inputs
(13, 14, 15, 16) are active simultaneously for the Dual Indication fault
response time.
d.
Clearance
i. A Clearance fault will be detected if the FYAc channel pair sequences
from the solid Green Arrow (13, 14, 15, 16) 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 FYAc channel (1, 3, 5,
7).
ii. A Clearance fault will be detected if the FYAc channel sequences from
the flashing Yellow 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 FYAc channel (1, 3, 5, 7).
iii. A Clearance fault will be detected if the Green Arrow (13, 14, 15, 16)
channel sequences from the solid Green Arrow (13, 14, 15, 16) to the
Red (13, 14, 15, 16) without a minimum clearance time on the Yellow
(13, 14, 15, 16). The fault icon (
) will be displayed for the solid Green
Arrow channel (13, 14, 15, 16).
3.11.2.2 FYAC TYPE 12 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 MMU-
16LE
SmartMonitor
®
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 of the
SmartMonitor
®
.