GE Multilin MM3 Motor Manager 3 Instruction Manual page 12

OVERVIEW
1–4
DISPLAY:
2 line, 40 character illuminated display
communicates all messages in simple
English for easy interpretation by users
unfamiliar with unit.
STATUS INDICATORS:
RUNNING:Contactor is energized
and motor is running.
STOPPED: Contactor is not
energized and motor is not running.
TRIPPED: Contactor is not
energized. Motor is not running.
The MM3 has tripped the motor due
To a fault. Normally a cause of
trip message will be displayed.
ALARM: One or more alarm
conditions are present.
Normally a cause of alarm
message will be displayed.
SWITCH INPUTS
Opto-isolated 120/240 VAC live inputs for various interlock functions.
The interlock inputs are fully programmable and can be assigned to
functions as setpoint access, plant interlock, test, and various others.
ANALOG INPUT/OUTPUT
4 to 20mA input for
Process control monitoring
/ alarming / tripping.
COMMUNICATIONS
RS485 2 wire serial
communication port
operates at 1200 to
57600 bps for remote
commands, monitoring
and setpoint store.
Modbus ® RTU protocol.
Front View
RELAY INDICATORS:
RELAY A: Contactor A energized.
RELAY B: Contactor B energized.
AUX 1: User programmable relay 1 energized.
AUX 2: User programmable relay 2 energized.
Rear View
THERMISTOR
GROUND CT INPUT
NTC or PTC thermistor 50:0.025 ground fault
input for hot winding
input.
detection.
RESIDUAL GROUND INPUT
PHASE CT INPUTS
3 isolated phase CT inputs
Figure 1-2: Features
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION
PROGRAM KEYS:
ACTUAL VALUES: Press to enter
actual values mode to display actual
Motor values such as current,
ground leakage, thermal capacity.
SETPOINTS:Press to enter setpoint
mode to alter or examine setpoints.
STORE: Save a newly entered
setpoint.
RESET:Reset the MM3 after a trip.
MESSAGE: Move to the desired
setpoint or actual value message.
VALUE: Increment or decrement
currently displayed setpoint value.
CONTROL KEYS:
AUTO: Selects operation of start
via communication port.
MANUAL: Selects manual.
operation of motor using the
Start key.
START A: Energize contactor A.
START B: Energize contactor B.
STOP: De-energize contactors.
Ground SUPPLY VOLTAGE
safety and
required to power the MM3
surge
VOLTAGE INPUT
Phase A voltage input for
voltage and power monitoring.
CONTROL POWER
120/240 VAC supply voltage
selector switch and fuse
access door
4 RELAYS
Contactor A: direct on
line / forward / wye
Contactor B: reverse / delta
User programmable relay
(AUX 1)
User programmable relay
(AUX 2)
Ground safety
809700A1.CDR
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