Appendix 1. EMC Installation Guidelines
1.6 EMC Countermeasure Parts
163
1.6.3 Surge Absorber
Make sure that the surge does not directly enter the AC line of the general-purpose stabilized power supply
(user-prepared) supplying power to the control unit and DIO. Select the following product or equivalent for the
surge absorber.
Refer to the manufacturer catalog for detailed characteristics, outline and connection methods of the surge
absorber.
(1) Part name
: RAV-781BYZ-2
Manufacturer : OKAYA ELECTRIC INDUSTRIES
Circuit voltage
50/60Hz Vrms
Max. tolerable
circuit voltage
Clamp
voltage
V±10%
Surge
withstand level
8/20
μ
s
Surge electrical
discharge start
voltage
1.2/50
μ
s
Static
capacity
Working
temperature
range
250V 3
φ
300V
783V
2500A
20kV
75pF
-20 ~ +70°C
4 1
1
UL -1 015 A W G1 6
O utline drawing
(a) Black (b) Black (c) Black
Circ uit drawing
Un it: mm
(2) Part name
: RAV-781BXZ-4
Manufacturer
:
OKAYA
ELECTRIC INDUSTRIES
Circuit voltage
50/60Hz Vrms
Max. tolerable
circuit voltage
Clamp
voltage
V±10%
Surge
withstand level
8/20
μ
s
Surge electrical
discharge start
voltage
1.2/50
μ
s
Static
capacity
Working
temperature
range
250V 3
φ
300V
700V
2500A
2kV
75pF
-20 ~ +70°C
41
1
UL-1015 AWG1 6
Outline drawing
Circuit drawing
(a) Black
(b) Black
(c) Black
Green
Unit: mm