21
11.4 THREE-WIRE START/STOP CONTROL
Shown below is the wiring diagram for a typical three-wire start/stop control scheme, using momentary
contacts (such as pushbuttons) for START and STOP commands.
NOTES:
1. Momentarily close TB-12 to TB-2 to START the drive, and momentarily open TB-1 to TB-2 to
STOP the drive.
2. If reverse direction is also required, ROTATION DIRECTION (Parameter 17) must be set to
FORWARD AND REVERSE (02), and TB-13A (Parameter 10) must be set to START REVERSE
(06). If the FWD/REV switch is changed while the drive is running, the drive will not change
direction until the START button is pushed. If reverse direction is not required, the other side of
the START pushbutton must be wired directly to TB-12.
3. For 0-10 VDC or 4-20 mA speed control, use one of the following methods:
1. 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.
2. 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.
STOP
COMMON
0-10 VDC INPUT
FORWARD
COMMON
REVERSE
0-10 VDC or 4-20 mA SELECT
COMMON
4-20 mA INPUT
1256 12 TXA TXB2 13A 13B 13C14 15 211 25 3130
MOMENTARY
STOP CONTACT
MOMENTARY
START CONTACT
The TB-2 terminals are internally connected to each other
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