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MMU2-16LE Series SmartMonitor

Malfunction Management Unit

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 MMU2-16LE SmartMonitor

will enter the fault

mode, transfer the OUTPUT relay contacts to the Fault position, and display the

CONFLICT status screen. The MMU2-16LE 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 MMU2-16LE SmartMonitor

will not transfer the OUTPUT

relay contacts to the Fault position.

The MMU2-16LE 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 MMU2-16LE SmartMonitor

will enter the

fault mode, transfer the OUTPUT relay contacts to the Fault position, and display the

RED FAIL status screen. The MMU2-16LE 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 MMU2-16LE 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 MMU2-16LE 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 is 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 MMU2-16LE SmartMonitor

into the Red Fail fault mode causing the Output relay contacts to transfer. Presence of

Input Voltage	24 VDC
Communication Ports	RS-485
Power Supply	24 VDC
Storage Temperature	-20°C to +70°C
Certifications	CE

EDI SmartMonitor MMU2-16LE Series User Manual

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EDI SmartMonitor MMU2-16LE Series Specifications