MMU-16LE
SmartMonitor
Operations Manual
Eberle Design Inc.
Page 7
Section 2
Standard Functions
2.1 CONFLICT MONITORING
When voltages on any conflicting channels are sensed as active for more than the Conflict
Fault time (Section 9), the MMU-16LE
SmartMonitor
®
will enter the fault mode, transfer the
OUTPUT relay contacts to the Fault position, and display the CONFLICT status screen.
The MMU-16LE
SmartMonitor
®
will remain in the fault mode until the unit is reset by the
RESET button or the EXTERNAL RESET input. When voltages on any conflicting channels
are sensed as active for less than the Conflict No-Fault time, the MMU-16LE
SmartMonitor
®
will not transfer the OUTPUT relay contacts to the Fault position.
The MMU-16LE
SmartMonitor
®
is fully programmable and requires the use of soldered wire
jumpers on an interchangeable Programming Card to define permissive channel pairs. The
Programming Card is used with both Type 16 and Type 12 operation. See Section 6.2.1 for
Programming Card details.
2.2 RED FAIL MONITORING
When voltages on all inputs (G, Y, R, (W)) to a channel are sensed as inactive for more
than the Red Fail Fault time (Section 9), the MMU-16LE
SmartMonitor
®
will enter the fault
mode, transfer the OUTPUT relay contacts to the Fault position, and display the RED FAIL
status screen. The MMU-16LE
SmartMonitor
®
will remain in the fault mode until the unit is
reset by the RESET button or the EXTERNAL RESET input. When voltages on all inputs to
a channel are sensed as inactive for less than the Red Fail No-Fault time, the MMU-16LE
SmartMonitor
®
will not transfer the OUTPUT relay contacts to the Fault position.
Red Fail Monitoring will be disabled when the RED ENABLE input is not active. In the Type
16 mode, Red Fail Monitoring will also be disabled if the LOAD SWITCH FLASH bit is set
to "1" in the Type 0 message from the Controller Unit.
Programming is provided in the SET / VIEW CONFIG menu item to enable Red Fail
Monitoring on a per channel basis. See Section 6.3.3 for the programming procedure.
2.2.1 RED ENABLE INPUT
The RED ENABLE input will be sensed as active by the MMU-16LE
SmartMonitor
®
when it
exceeds the Red Enable Input threshold (Section 8.1.2). The presence of the proper
operating voltage at this input enables Red Fail Monitoring, Minimum Yellow Change/Red
Clearance Monitoring, and Dual Indication Monitoring. In the Type 16 mode, if the LOAD
SWITCH FLASH bit is set to "1" in the Type 0 message from the Controller Unit, Red Fail
Monitoring will be disabled.
The main status screen will display “RED ENABLE IS OFF” if the RED ENABLE input is not
active. In the Type 16 mode, if the LOAD SWITCH FLASH bit is set to "1" in the Type 0
message from the Controller Unit, the main status screen will display “CU LS-FLASH i s
SET”.
2.2.2 WALK DISABLE OPTION
This option will modify the operation of Red Fail and Dual Indication Monitoring in the TS-1
Type 12 mode only. When enabled, the Red Fail and Dual Indication Monitoring function
will not monitor the Walk field outputs. Absence of signals on the Green, Yellow, and Red
field outputs of a channel will place the MMU-16LE
SmartMonitor
®
into the Red Fail fault
mode causing the Output relay contacts to transfer. Presence of active signals on the Walk
outputs will not cause a Dual Indication when concurrent with active Red or Yellow signals.
This function is enabled by the Unit Option called "WALK DISABLE" in the SET / VIEW
CONFIG menu. See Section 6.3.4.2.