889-3819-00
MMU2-1600GE series Operations Manual Rev Apr 2020 Page
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2.3.1
CHANNEL COMPATIBILITY
The monitor requires programming action to provide compatibility between channels.
The programming card has 120 pairs of holes for channel compatibility programming jumpers. The 120 jumper
hole pairs are logically labeled for easy identification of the jumper holes by channel pairs. A soldered wire
jumper in a jumper hole pair defines a pair of channels as permissive or compatible.
2.3.2
MINIMUM FLASH
The programming card has four pairs of holes for minimum flash programming jumpers. The four jumper hole
pairs are logically labeled for easy identification of the jumper holes in binary weighted fashion. A soldered wire
jumper in a jumper hole pair adds that designated input value to the binary weighted sum. Per the NEMA TS 2
standard, the actual value used is the binary weighted sum plus one.
2.3.3
MINIMUM YELLOW CHANGE CHANNEL DISABLE
The programming card has sixteen pairs of holes for Minimum Yellow Change Disable programming jumpers.
The sixteen jumper hole pairs are logically labeled for easy identification of the channel numbers. A soldered wire
jumper in a jumper hole pair disables Minimum Yellow Clearance monitoring for that channel. Typically, all
pedestrian channels should have these jumpers installed.
2.3.4
VOLTAGE MONITOR LATCH
The programming card has two pairs of holes for latch programming jumpers. The two jumper hole pairs are
logically labeled for easy identification of the +24 Volt Latch and CVM Latch. A soldered wire jumper in a
jumper hole pair causes that fault condition to be latched.
2.3.5
SERIAL EEPROM
The programming card contains a serial EEPROM. This device is not called for in the NEMA TS-2 specification
and is only compatible with other Reno A&E monitors. The programming card is interchangeable with other
manufacturer’s programming cards for the programming of the standard features. Reno A&E has provided the
serial EEPROM as a way of copying the other programming settings from one monitor to another monitor. Using
a non-Reno A&E programming card in this monitor will result in the monitor not being able to store the other
programming settings for copying to other Reno A&E monitors. See Section 2.4.10
for additional information on
how data stored in the serial EEPROM is used.
2.4
FEATURES
2.4.1
MONITOR POWER FAILURE
The monitor responds to a Power Failure by entering a non-latching flash state. The monitor responds to a Power
Failure whether it is the result of the over-current protection device operation, failure of the monitor power supply,
or absence of proper operating AC Line voltage as defined below.
The operating AC Line input is considered to be On if the voltage level is greater than 98V
RMS
AC and it is
considered to be Off if the voltage level is less than 89V
RMS
AC. The hysteresis from the Off state to the On state
or vice versa is at least 3V
RMS
AC.
The monitor responds to Power Failure as follows:
1)
If the AC Line input is Off for 450 milliseconds or less, the monitor continues to operate as though the
AC Line had remained On. The Output relay contacts do not transfer to the fault condition during this
interval. The Start-Delay relay maintains continuity between its Common and Normally Closed contacts.
2)
If the AC Line input is Off for 500 milliseconds or more, the monitor transfers the Output relay contacts
to the fault condition. The Start-Delay relay enables continuity between its Common and Normally Open
contacts. The time interval from the start of the AC Line input being Off and the transfer of both relays to
these states does not exceed 525 milliseconds. Both relays maintain these states for the duration of the
Power Failure.
2.4.2
MINIMUM FLASHING INDICATION
The monitor includes internal logic to enforce a user definable Minimum Flash time. Once the monitor has
transferred the Output relay contacts to the fault condition, the state of the Output relay contacts is maintained for
the Minimum Flash time before normal operation can resume.
All monitor initiated flash conditions will start the Minimum Flash timer. The monitor will not return to normal
operation until this timer has expired unless it is terminated by use of the front panel reset pushbutton or reset input
command which will cause an immediate transfer to the no fault state.
The duration of the Minimum Flash time is adjustable between the limits of 5 seconds and 15 seconds with an
incremental adjustment of one second and is programmed using jumpers on the Program Card. The NEMA TS-2
specification requires that the monitor add one second to whatever value is programmed on the program card and
that the value on the program card cannot be set to less than five seconds. This creates a useable range of 6
seconds to 16 seconds.
