11 .2 two-wire start/stop control – Lenze TCF Series User Manual
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11 .2
TWO-WIRE START/STOP CONTROL
This	wiring	diagram	shows	a	typical	two-wire	start/stop	control	scheme,	using	one	maintained	
contact	(such	as	that	from	a	PLC)	for	RUN	and	STOP	commands,	and	a	selector	switch	to	
select	rotation	direction .
MAINTAINED
RUN/STOP CONTACT
SIGNAL
COMMON
0-10
VDC
INPUT
DIGITAL
INPUT
REFERENCE
START
START
REVERSE
4-20
mA
INPUT
1
2
5 6
14
TXA TXB
4
13A 13B 13C
4
13D
25
11
15
30
2
SIGNAL
COMMON
DIGITAL
INPUT
REFERENCE
(See Note 3)
START
FORWARD
FWD
REV
(See Note 3)
NOTES
•	 Close	TB-1	to	TB-4	to	RUN,	and	open	TB-1	to	TB-4	to	STOP .
•	 For	this	configuration,	ROTATION	DIRECTION	(Parameter	17)	must	be	
set	to	FORWARD	AND	REVERSE	(02),	TB-13A	(Parameter	10)	must	be	
set	to	START	REVERSE	(07),	and	TB-13D	(Parameter	49)	must	be	set	to	
START	FORWARD	(05) .	
If reverse rotation is not required, simply close TB-1 to TB-4 to RUN, 
and open to STOP (no other wiring or programming is required).
• For 0-10 VDC or 4-20 mA speed control, use one of the following methods:
- Program Parameter 05 - STANDARD REFERENCE SOURCE for 0-10
VDC	(03)	or	4-20	mA	(04) .	This	method	is	preferable	if	only	one	speed	
source	is	required,	as	this	method	leaves	the	TB-13	terminals	free	to	be	
used	for	other	functions .
- Program one of the TB-13 terminals (13B, 13C are available in this
example)	for	0-10	VDC	(02)	or	4-20	mA	(03) .	When	that	TB-13	terminal	
is	closed	to	TB-4,	the	drive	will	respond	to	the	selected	speed	reference	
signal .	If	that	TB-13	terminal	is	not	closed	to	TB-4,	the	drive	will	respond	
to	the	speed	control	source	selected	in	Parameter	05	-	STANDARD	
REFERENCE	SOURCE .	This	method	must	be	used	if	it	is	necessary	to	
toggle	between	two	speed	sources .
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