Installation 3 – Lenze SCF frequency inverter User Manual

Page 25

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Lenze 13466146 EDBSF01 v24 EN

25

Installation 3

3.6.3 Alternate Two-Wire Start/Stop Control

Shown below is the wiring diagram for an alternate two-wire start/stop control scheme, using one
maintained contact for RUN FORWARD and another maintained contact for RUN REVERSE.

1 2 5 6

12

TXA TXB

2

13A 13B 13C

14

15

2

STO

P

C

O

MM

ON

0-10 VDC

IN

PU

T

C

O

MM

ON

RU

N F

WD

RU

N R

EV

0-10

VDC or 4-20 mA SELECT

C

O

MM

ON

4-20 mA I

N

PU

T

11

25

31

30

The TB-2 terminals are internally connected to each other

NOTE

• For this control scheme, TB-13A MUST be set to RUN REVERSE (05), even if

REVERSE direction is not required. Refer to Parameter 10 - TB13A FUNCTION

• Close TB-12 to TB-2 to RUN, and open TB-12 to TB-2 to STOP
• If reverse direction is also required, ROTATION DIRECTION (Parameter 17) must

be set to FORWARD AND REVERSE (02). Close TB-13A to TB-2 to RUN in REVERSE,
and open TB-13A to TB-2 to STOP. If TB-12 and TB-13A are closed to TB-2, the
drive will STOP

• For 0-10 VDC or 4-20 mA speed control, use one of the following methods:

- Program one of the TB-13 terminals (13A, 13B, or 13C) for 0-10 VDC (02) or 4-20

mA (03). When that TB-13 terminal is closed to TB-2, the drive will respond
to the selected speed reference signal. If that TB-13 terminal is not closed to
TB-2, the drive will respond to the speed control source selected in Parameter
05 - STANDARD SPEED SOURCE. This method must be used if it is necessary to
toggle between two speed sources.

- Program Parameter 05 - STANDARD SPEED 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.

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