Mitsubishi Electric FR-A500 Instruction Manual page 22

(1) Description of main circuit terminals
Symbol Terminal Name
R<L >, S<L >,
1 2
AC power input
T<L >
3
U, V, W Inverter output
R1<L >, Power supply for control
11
S1<L > circuit
21
Brake resistor
P/+, PR
connection
P/+, N Brake unit connection
Power factor improving
P/+, P1
DC reactor connection
Built-in brake circuit
PR, PX
connection
Earth (Ground)
*Note:<>Terminal names in parentheses are those of the EC version.
(2) Description of control circuit terminals
Type Symbol Terminal Name
STF Forward rotation start
STR Reverse rotation start
Start self-holding
STOP
selection
RH, RM, RL Multi-speed selection
JOG JOG mode selection
Second acceleration/
RT deceleration time
selection
MRS Output stop
RES Reset
AU Current input selection
Automatic restart after
CS instantaneous power
failure selection
Contact input
SD
common (sink)
24VDC power and
external transistor
PC common
Contact input
common (source)
Connect to the commercial power supply. Keep these terminals open when using the high
power factor converter (FR-HC) and power regeneration common converter (FR-CV).
Connect a three-phase squirrel-cage motor.
Connected to the AC power supply terminals R/L
and alarm output or when using the high power factor converter (FR-HC) or power
regeneration common converter (FR-CV), remove the jumpers from terminals R/L
L and S/L -S1/L and apply external power to these terminals.
11 2 21
Disconnect the jumper from terminals PR-PX and connect the optional brake resistor
(FR-ABR) across terminals P/+-PR.
Connect the optional FR-BU brake unit, power regeneration converter (FR-RC), high
power factor converter (FR-HC) or power regeneration common converter (FR-CV).
Disconnect the jumper from terminals P/+-P1 and connect the optional power factor
improving reactor (FR-BEL).
When the jumper is connected across terminals PX-PR (factory setting),
the built-in brake circuit is valid.
(Provided for 7.5K or less.)
For earthing (grounding) the inverter chassis. Must be earthed (grounded).
Turn on the STF signal to start forward rotation and turn it off to
stop. Acts as a programmed operation start signal in the
programmed operation mode. (Turn on to start and turn off to
stop.)
Turn on the STR signal to start reverse rotation and turn it off to
stop.
Turn on the STOP signal to select the self-holding of the start signal.
Use the RH, RM and RL signals as appropriate to select multiple
speeds.
Turn on the JOG signal to select jog operation (factory setting).
Jog operation can be performed with the start signal (STF or
STR).
Turn on the RT signal to select the second acceleration/
deceleration time. When the second functions such as "second
torque boost" and "second V/F (base frequency)" functions have
been set, these functions can also be selected by turning on the
RT signal.
Turn on the MRS signal (20ms or longer) to stop the inverter output.
Used to shut off the inverter output to bring the motor to a stop by the magnetic
brake.
Used to reset alarm output provided when protective function is activated. Turn on the
RES signal for more than 0.1s, then turn it off. Factory setting is reset always
enabled. By setting Pr. 75, reset can be set to enabled only at an inverter alarm
occurrence.
Recover about 1s after reset is cancelled.
Only when the AU signal is turned on, the inverter can be
operated with the 4-20mADC frequency setting signal.
Turning on the AU signal makes the voltage input invalid.
With the CS signal on, restart can be made automatically when
the power is restored after an instantaneous power failure. Note
that this operation requires restart parameters to be set. When
the inverter is shipped from the factory, it is set to disallow restart.
Common to the contact input terminals and terminal FM. Common output terminal for
24VDC 0.1A power (PC terminal).
When transistor output (open collector output), such as a programmable controller, is
connected, connect the external power supply common for transistor output to this
terminal to prevent a fault caused by undesirable current. This terminal can be used
as a 24VDC, 0.1A power output. When source logic has been selected, this terminal
serves as a contact input common.
13
INSTALLATION AND WIRING
Description
and S/L . To retain the alarm display
1 2
Description
-R1/
1
2
When the STF
and STR signals
are turned on
simultaneously,
the stop command
is given.
Input terminal
function selection
(Pr. 180 to
Pr. 186) change
terminal
functions.
Input terminal
function selection
(Pr. 180 to
Pr. 186) change
terminal
functions.