889-3809-02
Model 2018E Operations Manual Rev Apr 2020 Page
14
of 39
FYA Childs
: When a child channel is selected, the monitor will determine if the child is permissive or
conflicting with the parent channel based on the Program Card. If permissive, the child will have a
green border or a yellow border based on the setting of FYA 1-4 Uses Yellow and FYA 5-18 Uses
Yellow. If conflicting, the child will have a red border. These settings can only be modified through
the RaeComM software.
The testing defaults for these features should be: FYA Enable set to OFF, FYA Ignore Yellow Conflict set to OFF,
FYA 1-4 Uses Yellow set to OFF, FYA 5-18 Uses Yellow set to OFF, and all FYA Childs disabled.
Operations Modified:
Conflict Monitoring
: Normal conflict testing checks active Green and Yellow displays for being
permissive. With FYA Enable set to yes and FYA Ignore Yellow Conflict set to yes, the monitor will
ignore a Yellow-Yellow conflict between a channel yellow and its conflicting child yellow (channel
marked with a red border) if the Yellow is terminating a flashing Yellow arrow display. With FYA
Enable set to yes, any channel check box with a green or yellow border for a child channel will have
the appropriate display (Green or Yellow) of the child channel monitored for a flashing condition. A
flashing input is defined as an input that stays ON for at least 200 milliseconds and no longer than 600
milliseconds and is OFF for at least 200 milliseconds and no longer than 600 milliseconds. If the
input does not flash (stays on solid) the monitor will create a conflict with the conflicting child
(channel marked with a red border) even though the two channels are usually jumpered as permissive.
Red Fail Monitoring
: Normal red fail testing ensures that at least one display is active for a channel.
With this feature active, any channel with a checked box with a green or yellow border for a child
channel will have the appropriate display (Green or Yellow) of the child channel included when
checking for a red fail of the parent channel.
Dual Indication Monitoring
: Normal dual indication testing ensures that only one display for a
channel is active at a time. With FYA Enable set to yes, any channel with a child with a green or
yellow border will have the appropriate display (Green or Yellow) of the child channel included when
checking for a dual indication.
Short Yellow Monitoring
: When Flashing Yellow Arrow (FYA) Left Turns are enabled and a channel
has an FYA setting with a green or yellow border for one of its child channels, then the Yellow of the
parent channel will be used for terminating the Yellow or Green of the child channel and will be
checked for short yellow and skipped yellow.
Short Clearance Monitoring
: When Flashing Yellow Arrow (FYA) Left Turns are enabled and a
channel has an FYA setting with a green or yellow border for one of its child channels, then that child
will be checked for short clearance.
Typical Use
:
See Application Note AN-005 for detailed examples of this feature.
The intended field wiring
connections for this feature are the Red, Yellow, and Green arrows connected to the parent channel and the
flashing Yellow arrow connected to the Green or Yellow of the permissive child channel. If channel 1 is the
protected left turn and will have an FYA display driven by the channel 9 green and the yellow of channel 1 will be
ON at the same time as the yellow of channel 2 to terminate a flashing yellow arrow, the configuration would be:
FYA Enable should be ON, Channel 1 will have childs of channel 2 and channel 9, FYA 1-4 Uses Yellow should
be OFF, FYA 5-18 Uses Yellow should be OFF, and FYA Ignore Yellow Conflict should be ON.
Care should be taken to insure that the possible phase sequencing does not allow the flashing Yellow arrow to
terminate while its opposing through is still green. Be sure to check pre-emption sequencing as well.
2.6.1.3
OPTION SWITCH 3 - +24VDC ENHANCED MONITORING – 24V ENH
Configuration:
The setting of the +24VDC Enhanced Monitoring Enable (Option Switch 3 – 24V ENH) DIP
switch determines if this feature is active. This feature allows for over voltage monitoring and ripple voltage
monitoring. The testing default for this feature should be disabled.
Operations Modified:
+24VDC Monitoring
: When +24VDC Enhanced Monitoring is enabled, the voltage on the +24VDC
input is also monitored for over voltage monitoring with greater than 30V
DC
being a fault, and ripple
voltage monitoring with greater than 1V
RMS
being a fault. The
VDC FAILED
indicator will flash at a
5 Hz rate when there is an over voltage fault and the indicator will flash at a 1 Hz rate when there is a
ripple fault.
Typical Use
: This feature can be useful for early detection of power supply failures before they may damage
equipment
2.6.1.4
OPTION SWITCH 4 – SPECIAL FUNCTION 1 INVERT – SF1 INV
Configuration:
The setting of the Special Function 1 Invert Enable (Option Switch 4 – SF1 INV) DIP switch
determines if this feature is active. When the switch is OFF, the Special Function 1 input is sensed as active when
the voltage is greater than 70V
RMS
for 550 milliseconds or off when the voltage is less than 50V
RMS
for 550
