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21
Figure 8 - Manual Speed
Potentiometer/ Interface Details
Electronic Speed Control
Motor speed can be controlled with a 0 to +10 VDC isolated signal with 0.1 mA
current capability in lieu of the manual speed potentiometer. This speed
control input should be connected to terminal S2 on the control board. The
common side of the signal must also be isolated and connected to terminal
S1 on the main control board.
Logic Signal Control of Braking, Direction of Rotation, and Deceleration
Motor braking (or disable), direction of rotation and deceleration can be
controlled using optically isolated logic signals from a programmable
controller, personal computer, or other electronics.
Exercise extreme caution when using Programmable Logic Controllers (PLCs).
Although some may claim to have optically isolated output modules, their output
commons may be connected to other circuitry either within or connected to the
PLC. In such cases, the PLC outputs should be isolated from the ABL control, by
a relay or by an electronic isolation module, to prevent damage to the PLC or the
ABL control.
If a Programmable Controller with a
relay output module is not available,
AC or DC outputs from the PLC can
be used to drive separate relay coils.
See PLC user’s manual for application
information. See Figure 6 to determine
how to connect relay contacts to the
ABL-3912E and ABL-3913E.
Signal Isolation Using a Bodine
Model 3984 Interface Module:
Follow the installation instructions
provided with the module to isolate
the input signals between the
control electronics and the ABL
Control. See Figure 7 for control
input connections and Figure 8 for
speed control interface details.
WARNING
Never rely on logic circuitry as a means of disabling the motor or control.
To prevent unsuspected mechanical motion and potential injury, the 115
VAC power should always be disconnected whenever logic circuits or
the driven equipment are serviced.
12V
10K
Minimum
Speed
Adjustment
10K
Maximum
Speed
Adjustment
Signal Common
51.1K
Signal Common
100K
100K
10K
10K
S3
S2
S1
–
+
Содержание 3912
Страница 22: ...NOTES ...