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RODIX SOLUTION 

 

Good wiring practices for 

avoiding electrical noise 

problems. 

 

Rodix controls have been designed with a 
high degree of immunity to electrical 
noise; however, depending on the control 
installation, electrical noise can cause 
problems.  These problems occur in less 
than 1% of the product installations.  Most 
electrical noise problems can be avoided 
by following some simple guidelines.  
Good wiring practices need to be used to 
prevent electrical noise from interfering 
with your control’s operation.  Another 
name for electrical noise is Electro-
Magnetic Interference (EMI). 

 

Symptoms of Electrical Noise 

The symptoms of electrical noise would 
appear as follows: a brief pause or a brief 
“bump” in the vibratory feeder’s output 
that the control automatically recovers 
from.  In rare cases the control will either 
stop operating or run continuously at full 
power in 120 pulse mode until the power 
switch is slowly cycled OFF and ON.   

 

Sources of Electrical Noise 

Electrical noise is generated by devices 
like relay coils, solenoid valves, 
contactors, servo motors, and variable 

frequency inverter drives.  The electrical 
noise is then transferred to another 
device by one of three ways.  The noise 
could be conducted through the power 
wires, or capacitively coupled from wire to 
adjacent wire, or it is transmitted from the 
wires of a nearby noise source. 

 

Solutions for Electrical Noise 

1.  Use shielded wires for all I/O (Input / 
Output) signals.  The I/O signals may 
include: 4-20mA input, Run input, Sensor 
input, 0-5VDC input, Interlock input or 
AUX output.  The shield “drain” wire 
should be tied to the chassis in the Rodix 
control.  The drain wire should be kept 
shorter than 2”.  Please see the enclosed 
picture.

 

 

 

Example of a “drain” wire termination 

 
 

2.  Never run I/O signal wires in the same 
conduit or raceway as AC power lines 
such as wires to motors, solenoids, 
heaters, welders and Rodix controls, etc. 

 

3.  I/O wires within an enclosure should 
be routed as far away as possible from 
relays, solenoids, transformers, power 
wiring and other noisy equipment.  Keep 
the I/O signal wires separate from the 
control’s input and output power wiring.  
Secure the wires in place.   

 

4.  Whenever relays or solenoid valves 
are used, install a Snubber on them to 
reduce electrical noise.  Use a diode on a 
DC coil.  Use a RC Snubber on an AC 
coil. 

 

 
 
 
 
 
 
 
 
 

 

5.  In extremely high EMI environments, 
Power Line Filters and ferrite beads can 
be effective.  Install ferrite beads on I/O 
signal wires as close as possible to the 
circuit board terminal strip.  Loop the wire 
through the bead several times or use 
several beads on each wire for additional 
protection. 

 
 
 

RODIX, INC.

 

2316 23

rd

 Avenue, Rockford, IL  61104 

Toll Free (800) 562-1868,  FAX (815) 316-4701

 

E-mail [email protected] 

www.rodix.com 

 

2000,2011 RODIX INC. Good Wiring 10/25/2011 

RODIX INC. 

FEEDER CUBE

 

RODIX SOLUTION 
.408 

Drain 
Wire

RELAY
COIL

SNUBBER

VAC

104M06QC47

QUENCH-ARC

RECTIFIER
DIODE

RELAY
COIL

1N4006

VDC

+

-

Содержание FC-70 Plus Series

Страница 1: ...ing when the control turns ON Set position 2 of S1 DIP switch to the ON position to enable the two second SOFT Start function Set position 2 of S1 DIP switch to the OFF position to disable the SOFT Start function 4 REMOTE OFF ON CONTROL A Run Jumper has been installed at the factory as shown on the enclosed wiring diagram Remote OFF ON operation of the FC 70 Series Feeder Cube control can be confi...

Страница 2: ...y WARRANTY Rodix Control Products are Warranted to be free from defects in material and workmanship under normal use for a period of two years from date of shipment For the full description of the warranty terms and software license please contact the factory For assistance installing or operating your Rdix Feeder Cube please call the factory or visit our web site Technical help is available to an...

Страница 3: ...D GND GND JUMPER OUTPUT ON OFF 60 120 PULSE 0 120 VAC P N 24 214 5 AMP R20 POT COM COM HOT 3 2 1 TB1 4 TB2 J1 3 2 1 LOAD 4 Ext Volts Gnd 12 24 Run R24 R25 120 Soft AMP 60 INPUT 50 60 Hz 120 VAC MALE LINE CORD POWER Bl 14 Wh 14 Gr 14 Bl 14 Wh 14 Gr 14 Bl 14 Wh 20 Wh 14 Bl 14 RODIX INC FEEDER CUBE FC 70 Series WIRING DIAGRAM MODEL INPUT VAC AMPS OUTPUT FC 70 120 VAC 5 0 120 V RODIX INC 2316 23rd Ave...

Страница 4: ...lutions for Electrical Noise 1 Use shielded wires for all I O Input Output signals The I O signals may include 4 20mA input Run input Sensor input 0 5VDC input Interlock input or AUX output The shield drain wire should be tied to the chassis in the Rodix control The drain wire should be kept shorter than 2 Please see the enclosed picture Example of a drain wire termination 2 Never run I O signal w...

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