889-3819-00
MMU2-1600GE series Operations Manual Rev Apr 2020 Page
18
of 51
With LED thresholds, the monitor senses Greens, Yellows, Reds, and Walks are sensed as ON when their voltage
is above 70V
RMS
and OFF when below 50V
RMS
.
Dual Indication
: Normal dual indication testing senses Greens, Yellows, and Walks as ON when their voltage is
above 25V
RMS
and OFF when below 15V
RMS
. Reds are ON when their voltage is above 70V
RMS
and OFF when
below 50V
RMS
. With LED thresholds, the monitor senses Greens, Yellows, Reds, and Walks as ON when their
voltage is above 25V
RMS
and OFF when below 15V
RMS
.
Short Yellow
: Normal short Yellow testing senses Greens, Yellows, and Walks as ON when their voltage is above
25V
RMS
and OFF when below 15V
RMS
. Reds are ON when their voltage is above 70V
RMS
and OFF when below
50V
RMS
. With LED thresholds, the monitor senses Greens, Yellows, Reds, and Walks are sensed as ON when their
voltage is above 70V
RMS
and OFF when below 50V
RMS
.
Short Clearance
: Normal short Yellow testing senses Greens, Yellows, and Walks as ON when their voltage is
above 25V
RMS
and OFF when below 15V
RMS
. Reds are ON when their voltage is above 70V
RMS
and OFF when
below 50V
RMS
. With LED thresholds, the monitor senses Greens, Yellows, Reds, and Walks are sensed as ON
when their voltage is above 70V
RMS
and OFF when below 50V
RMS
.
Field Check
: Normal field check testing senses Greens, Yellows, and Walks as ON when their voltage is above
25V
RMS
and OFF when below 15V
RMS
. Reds are ON when their voltage is above 70V
RMS
and OFF when below
50V
RMS
. With LED thresholds, the monitor senses Greens, Yellows, Reds, and Walks as ON when their voltage is
above 25V
RMS
and OFF when below 15V
RMS
.
Typical Use
: Once any LED field displays are installed, using LED Thresholds will provide better fault checking
by using voltage thresholds that are specifically suited to each type of test being performed.
2.6.5
PER CHANNEL RED ENABLE
Configuration:
The setting of Co-Channel / Per Channel Red Enables determines if this feature is active. When
active all channels with a setting of “Y” for a Per Channel Red Enable setting will perform normal red fail testing
(See Section 2.5.2). Per Channel Red Enable is disabled when the RED ENABLE input is not active. The testing
defaults for this feature are all Per Channel Red Enables enabled and Co-Channel / Per Channel Red Enables set to
no.
Tests Modified:
Red Fail
: Normal red fail testing ensures that at least one display is active for a channel. With this feature active,
any channel with a setting of “-” for a Per Channel Red Enable will not be tested for red fail faults.
Field Check
: Normal field check testing ensures that the at least one display is active for a channel. With this
feature active, any channel with a setting of “-” for a Per Channel Red Enable will not be tested for field check
faults.
Typical Use
: This feature is useful when the user wants to monitor a display that may not be directly controlled by
the controller but still wants to have Dual Indication testing for the channel. A typical application is an advance
warning sign. The user may want to ensure that both indications are not on at the same time and that neither is on
during specific times. The Per Channel Red Enable feature gives the user the ability to permanently disable the
Red Enable function and Field Check for specific channels. The Dual Indication function will still operate
according to setting of the Dual Indication / Field Check enables. For the purpose of the Conflict function and the
Short Clearance functions, a dark channel is treated as if it were Red.
2.6.6
MODIFIED CVM LATCH
Configuration:
The setting of Modified CVM Latch determines if this feature is active. This feature only has an
effect if the CVM Latch jumper is installed on the programming card. The testing default for this feature is set to
no.
Tests Modified:
CVM
: Normal CVM testing checks for the CVM input being low. When this feature is enabled and the CVM
Latch jumper is installed, the monitor will not latch a CVM fault until the CVM input has been valid (Low) for
more than 175 milliseconds.
Typical Use
: This feature is useful in cabinets where the CVM input may not always be valid within the
programmed Minimum Flash time and where latched CVM failures is desired. This feature basically requires that
CVM be valid before a CVM fault will be latched.
2.6.7
12 VOLT DC MONITORING
Configuration:
The setting of 24V-2 to 12VDC determines if this feature is active. A low on the +24V Monitor
Inhibit input inhibits the operation of the +12 Volt Monitor. The testing default for this feature is set to no.
