Model MMU-1600G Series Op Man - Ver 1.07.23 - Rev 20151026DL
Page 7 of 58
The Model MMU-1600G Series is comprised of the following monitors:
Model MMU-1600G (Reno USA)
For applications calling for a NEMA TS 2-2003 compliant Malfunction
Management Unit with integral graphics display.
Model MMU-1600G (Reno Canada) For applications calling for a NEMA TS 2-2003 compliant Malfunction
Management Unit with integral graphics display and Canadian Fast Flash
monitoring.
Model MMU-1600GE (Reno USA)
For applications calling for a NEMA TS 2-2003 compliant Malfunction
Management Unit with integral graphics display and optional Ethernet network
connector.
Model MMU-1600GE (Reno Canada) For applications calling for a NEMA TS 2-2003 compliant Malfunction
Management Unit with integral graphics display and Canadian Fast Flash
monitoring and optional Ethernet network connector.
2 . 0 G E N E R A L C H A R A C T E R I S T I C S
2.1
INPUTS
2.1.1 AC Line
The over-current protected side of 120 volt AC 60 hertz source. This input (Connector A - Pin A) is used to generate the
voltages required to operate the monitoring logic. The monitor has a front panel mounted over-current protection device in
the 120 volt AC input to the unit. This fuse is a 1/4 AMP SLO-BLOW and should only be replaced with a fuse of the same
type and value.
Typical Connection: Cabinet AC Line power source.
2.1.2 AC Neutral
The unfused and unswitched return side of the 120 volt AC 60 hertz power source. This input (Connector A - Pin V) is the
referenced signal for all field terminal voltage sensing inputs. This input is not connected to Logic Ground or Earth Ground
within the unit.
Typical Connection: Cabinet AC Neutral.
2.1.3 Earth Ground
The monitor has an input terminal (Connector A - Pin U) providing an independent connection to the chassis of the unit.
This input is not connected to Logic Ground or AC Neutral within the unit.
Typical Connection: Cabinet Earth Ground.
2.1.4 Field Terminals (Reds, Yellows, Greens, and Walks)
The field terminal inputs are where the Red, Yellow, Green, and Walk indications are connected to the monitor. The inputs
used and how they are used is determined by the state of the Type Select input (See Section
2.1.11
).
Type 16: Three inputs are provided for each channel to permit the monitoring of voltages at the Green, Yellow, and Red
signal field terminals. If the channel is used to monitor pedestrian indication, they are connected Don’t Walk to Red,
Pedestrian Clearance to Yellow, and Walk to Green.
Type 12: Four inputs are provided for each channel to permit the monitoring of voltages at the Green, Yellow, Red, and
Walk signal field terminals.
The thresholds used to determine the ON and OFF states of the field terminals can be modified from the standard
(incandescent) thresholds to ones more appropriate for LED field displays. The LED thresholds are more restrictive than the
standard thresholds. Therefore, you will not miss a fault using the LED thresholds that would have been detected using the
standard thresholds.
In the Standard Mode (Incandescent Field Displays):
A Green, Yellow, or Walk signal input is sensed as ON when it exceeds 25V
RMS
and a signal input is sensed as OFF when
it is less than 15V
RMS
. Signals between 15V
RMS
and 25V
RMS
may be in either state.
A Red signal input is sensed as ON when it exceeds 70V
RMS
and a signal input is sensed as OFF when it is less than
50V
RMS
. Signals between 50V
RMS
and 70V
RMS
may be in either state.
In the LED mode (LED Field Displays):
For the purpose of testing for Conflicts, Multiple Indications, and Flashing Don’t Walk Monitoring, a Green, Yellow,
Red, or Walk signal input is sensed as ON when it exceeds 25V
RMS
and a signal input is sensed as OFF when it is less
than 15V
RMS
. Signals between 15V
RMS
and 25V
RMS
may be in either state.
