Suppression of RF noise
PSI 6XXX.350 L1
6-1
1070 080 067-101 (2001.03) GB
6
Suppression of RF noise
Means of noise suppression are required to prevent radiation of radio frequency noise.
Such noise is caused by transients peaks, which are transmitted by the power supply line.
Noise should be neutralized at the source. If this is not practical, the noise suppression
devices must be placed as close as possible to the source.
All inductive devices such as valves, solenoids and other switching elements (or their
connecting wires), which are situated in the vicinity of the timer require noise suppres-
sion.
Because of inherent vibrations of the machine, the mounting of all noise suppression de-
vices must be resistant to fracture.
∼
GND
+
MP
Diode, suitable for small DC relays
RC element for AC relays and AC
motors
DIODE
RC ELEMENT
GND
+
DI-ZD attenuation element for large DC
contactors and defined drop-out times
RC element for spark quenching of in-
ductive loads
DIODE AND ZENER DIODE
RC ELEMENT
Figure 6:
Examples of noise suppression
Voltage
Resistor
Capacitor
Diode
24 VDC
48 VDC
110 VAC
220 VAC
440 VAC
-
-
220
Ω
/1 W
220
Ω
/5 W
220
Ω
/5 W
-
-
0.5
µ
F 400/600 V
0.1
µ
F 500 V
0.1
µ
F 1000 V
1 N 5060/ZL 12
1 N 5060/ZL 22
This table serves only as an example. The actual component values depend on the spe-
cific load conditions.
Summary of Contents for PSI 6XXX.350 L1 Series
Page 1: ...PSI 6XXX 350 L1 Technical Information PSI 6000 101 Edition Description of Timer and I O Level ...
Page 3: ......
Page 7: ...PSI 6XXX 350 L1 Contents IV 1070 080 067 101 2001 03 GB Your notes ...
Page 29: ...Technical data PSI 6XXX 350 L1 2 4 1070 080 067 101 2001 03 GB Your notes ...
Page 37: ...Installation PSI 6XXX 350 L1 4 2 1070 080 067 101 2001 03 GB Your notes ...
Page 39: ...Cables PSI 6XXX 350 L1 5 2 1070 080 067 101 2001 03 GB Your notes ...
Page 41: ...Suppression of RF noise PSI 6XXX 350 L1 6 2 1070 080 067 101 2001 03 GB Your notes ...
Page 47: ...Electrical connection PSI 6XXX 350 L1 7 6 1070 080 067 101 2001 03 GB Your notes ...
Page 88: ...Control diagrams PSI 6XXX 350 L1 8 1 1070 080 067 101 2001 03 GB 8 Control diagrams ...
Page 97: ...Control diagrams PSI 6XXX 350 L1 8 10 1070 080 067 101 2001 03 GB ...
Page 113: ...Messages PSI 6XXX 350 L1 10 6 1070 080 067 101 2001 03 GB ...
Page 117: ...Ordering PSI 6XXX 350 L1 12 2 1070 080 067 101 2001 03 GB Your notes ...
Page 123: ...Annex PSI 6XXX 350 L1 A 6 1070 080 067 101 2001 03 GB Your notes ...
Page 124: ...Annex PSI 6XXX 350 L1 A 7 1070 080 067 101 2001 03 GB Your notes ...
Page 125: ...Annex PSI 6XXX 350 L1 A 8 1070 080 067 101 2001 03 GB Your notes ...
Page 126: ...Annex PSI 6XXX 350 L1 A 9 1070 080 067 101 2001 03 GB Your notes ...
Page 127: ...Annex PSI 6XXX 350 L1 A 10 1070 080 067 101 2001 03 GB Your notes ...
Page 128: ...1070 080 067 101 2001 03 GB TI AT VWS Printed in Germany ...