Mitsubishi Electronics FR-A500L Description of main circuit terminals, Terminal Name Description

			INSTALLATION AND WIRING
(1) Description of main circuit terminals
Type	Symbol	Terminal Name	Description
	R, S, T	AC power input	Connect to the commercial power supply. Keep these terminals unconnected when
	<L1, L2, L3>		using the high power factor converter (MT-HC).
	U, V, W	Inverter output	Connect a three-phase squirrel-cage motor.
			Connected to the AC power supply terminals R and S. To retain the alarm display
	R1, S1	Power supply for	and alarm output or when using the high power factor converter (MT-HC), remove
	<L11, L21>	control circuit	the jumpers from terminals R-R1 and S-S1 and apply external power to these
			terminals.
Main	P, N	Optional converter	Connect the optional power return converter (MT-RC) or high power factor converter
	<+,->	connection	(MT-HC).
circuit
	P, P1	DC reactor	Connect the enclosed DC reactor. (375, 450K)
		connection	DC reactor is prewired in 530-900K sizes.
	P, PR	Brake resistor	Connect the optional FR-BR5 brake resistor.
	<+, PR>	connection
		Ground	For grounding the inverter chassis. Must be earthed.
Note:<	>Terminal names in parentheses are those of the EC version.

(2) Description of control circuit terminals

Type

Input signals	e.g. start, function setting
	Contacts,

Symbol	Terminal Name	Description
		Turn on the STF signal to start forward rotation and turn it off to	When the STF
STF	Forward rotation start	stop. Acts as a programmed operation start signal in the	and STR signals
		programmed operation mode. (Turn on to start and turn off to	are turned on
		stop.)	simultaneously,
		Turn on the STR signal to start reverse rotation and turn it off to	the stop
STR	Reverse rotation start		command is
		stop.
			given.
STOP	Start self-holding	Turn on the STOP signal to select the self-holding of the start signal.
	selection
RH，RM，RL	Multi-speed selection	Use the RH, RM and RL signals as appropriate to select multiple
		speeds.	Input terminal
		This terminal connected internally, can not be used by the
(JOG)	JOG mode selection		function selection
		customer. (530-900KW:this signal is assigned in Factory.)
			(Pr. 180 to
		Turn on the RT signal to select the second acceleration/
			Pr. 186) change
	Second acceleration/	deceleration time. When the second functions such as "second	terminal
RT	deceleration time	torque boost" and "second V/F (base frequency)" functions have	functions.
	selection	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.
MRS	Output stop	Used to shut off the inverter output to bring the motor to a stop by the magnetic
		brake.
RES	Reset	Used to reset the protective circuit activated. Turn on the RES signal for more than
		0.1 sec, then turn it off.
AU	Current input	Only when the AU signal is turned on, the inverter can be	Input terminal
	selection	operated with the 4-20mADC frequency setting signal.	function selection
	Automatic restart after	With the CS signal on, restart can be made automatically when	(Pr. 180 to Pr.
			186) change
CS	instantaneous power	the power is restored after an instantaneous power failure. Note	terminal
		that this operation requires restart parameters to be set. When
	failure selection		functions.
		the inverter is shipped from the factory, it is set to disallow restart.
SD	Contact input	Common terminal for the terminal FM.
	common (sink)	Common output terminal for 24VDC 0.1A power (PC terminal).
	24VDC power and	When transistor output (open collector output), such as a programmable controller, is
	external transistor	connected, connect the external power supply common for transistor output to this
PC	common	terminal to prevent a fault caused by leakage current. This terminal can be used as a
	Contact input	24VDC, 0.1A power output. When source logic has been selected, this terminal
	common (source)	serves as a contact input common.

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