Suppression Circuit - SMB MAT-LC-C Series User Manual

Proper grounding and wiring are essential for all electrical equipment to ensure optimal operating
characteristics for your system, as well as provide better protection from electrical noise for your
system.
The wiring of the C06/C07 motion controller and its related equipment follows all valid electrical
coding rules. Install and operate all equipment in compliance with all valid national or regional
standards. Liaise with regional authorities to determine criteria that meet special needs.
Safety factors must be considered when designing the grounding and wiring of the C06/C07
system, otherwise the equipment may malfunction. Therefore, you should implement all safety
regulations to avoid personal injury and equipment damage.
WARN
1. Attempting to ground or wire under live conditions may result in death or serious personal
injury and equipment damage.
2. The control equipment may cause misoperation of the equipment it controls, resulting in
death or serious personal injury and equipment damage. Therefore, the C06/C07 system must
have the emergency stop function, electromechanical interlock or other redundant safety
facilities independent of the C06/C07 motion controller.
3.6

Suppression Circuit

When using an inductive load, add a suppression circuit to limit the voltage rise when the output
is turned off. Suppression circuitry protects the output from premature failure due to high
inductive switching currents. In addition, the suppression circuit can limit the electronic noise
generated when the inductive load is switched.
NOTIFICATION
The effectCiveness of the suppression circuit depends on the application, and you should adjust
its parameters to suit your particular application. Make sure that all device parameters match
the actual application.
❑ Transistor outputs and relay outputs to control DC loads
The transistor outputs are internally protected to accommodate a variety of applications. Since
the relay type output can be connected to both DC and AC loads, there is no internal protection.
Figure 3-6 shows an example of a DC load suppression circuit. In most applications, an
additional diode A will suffice, but if your application requires a faster turn-off speed, it is
recommended that you add a Zener diode B. Make sure that the Zener diode can meet the
current requirements of the output circuit.
Figure 3-6 Suppression circuit for DC load
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