38
Indoor power source and communication wiring
Power cable and communication wire must be fixed firmly.
Each indoor must be grounded well.
When power cable exceeds the range, increase the gauge appropriately.
Shielded layer of communication wires must be connected together and be earthed at single
point.
The total length of communication wire cannot exceed 1000m.
Communication wire for wired controller
Indoor
total
current (A)
Power
cable
section
(mm
2
)
Rated
current of
overcurrent
breaker
(A)
Rated current of residual
circuit breaker (A)
Ground fault interrupter
(mA)
response time (S)
Wire
length
(m)
Outdoor/indoor
(mm
2
)
Indoor/indoor
(mm
2
)
Communication wire section
20A, 30mA, below 0.1s
30A, 30mA, below 0.1s
40A, 30mA, below 0.1s
50A, 30mA, below 0.1s
2-core × (0.75-2.0mm
2
)
shielded wire
≥10 and <15
≥15 and <22
≥22 and <27
Item
<10
3.5
5.5
10
23
20
30
40
50
24
27
42
2
Introduction of DIP switch on outdoor connecting board:
BM1, BM2, BM3, BM4, BM5: 8-bit DIP switch
Selection switch and the display
Electric wiring and the application
• The shielding lay of the signal line must be grounded at one end.
• The total length of the signal line shall not be more than 250m.
Length of Signal Line (m)
Wiring Dimensions
≤250
0.75mm
2
× 3 core shielding line
