S8VK-WA
13
Recommended circuit breakers and fuses
• Product failure may result in fire or electric shocks. Therefore,
always use the recommended circuit breaker or fuse.
• To ensure conformance to safety standards, and secure safety of
the Unit, connect an input to the Unit via the recommended circuit
breakers or fuses indicated in the table below.
• If multiple Units are used through crossover wiring, select the
circuit breaker or fuse in view of the input current and inrush
current.
Wiring method
• Connect the input as shown in the figure below.
• In the case of a three-phase four-wire system, do not connect the
ground and neutral wire, but connect the other three wires to “L1/
+, L2, L3/-”.
Wiring
• This is the protective earth terminal specified in the safety
standards. Connect the ground completely. Electric shock or
malfunction may occur if the ground is not connected completely.
• Minor fire may possibly occur. Ensure that DC input and output
terminals are wired correctly.
• When you insert wires or insert a screwdriver into a release hole,
do not press down on the terminal block with a force of 40 N or
greater.
• Do not wire anything to the release holes.
• Do not tilt or twist a flat-blade screwdriver while it is inserted into a
release hole on the terminal block. The terminal block may be
damaged.
• Insert a flat-blade screwdriver into the release holes at an angle.
The terminal block may be damaged if you insert the screwdriver
straight in.
• Do not allow the flat-blade screwdriver to fall out while it is inserted
into a release hole.
• Do not bend a wire past its natural bending radius or pull on it with
excessive force. This may cause a wire to be broken.
• Do not insert more than one wire into each terminal insertion hole.
• Do not pre-solder the ends of the wires. Doing so will inhibit proper
connection.
• Be sure to remove the sheet covering the S8M for machining
before power-ON so that it does not interfere with heat dissipation.
• If there is a possibility of vibration or shock, please use wires and
stranded wires with ferrules.
• Minor fire may occasionally occur.
Always check the voltage of the equipment when replacing the
Unit, and be sure to use a conforming product.
• Use the following material for the wires after confirming the rating
of the wires in order to prevent smoking or ignition.
Recommended Wire Type
• Input crossover wiring can be used for the input side of this Power
Supply.
• Do not use crossover wiring for more than five Power Supplies,
and do not allow the steady-state current to the input terminals to
exceed 10 A. The above table gives the recommended wires for
one Power Supply.
• If you use crossover wiring for N number of Power Supplies, a
current that is N times the current for a standalone Power Supply
may flow to the input terminals. Take this into consideration when
you select wiring materials.
Model
Input
Recommended product
(per single Unit)
S8VK-WA24024
Three-phase
Circuit breaker:
240 VAC min., 4 to 20 A, Type B,
C, or D characteristics
Single-phase
Circuit breaker:
240 VAC min., 4 to 20 A, Type B,
C, or D characteristics
DC
Fuse:
Fast-acting type, 350 VDC min., 6 A
S8VK-WA48024
Three-phase
Circuit breaker:
240 VAC min., 4 to 20 A, Type B,
C, or D characteristics
Single-phase
Circuit breaker:
240 VAC min., 7 to 20 A, Type B,
C, or D characteristics
DC
Fuse:
Fast-acting type, 350 VDC min., 8 A
L1
L2
L3
N
PE
TN-S
TN-C
PEN
L3
L2
L1
Single-phase
PE
N
L
Input wiring (TN-S, TN-C, single-phase)
Circuit
breaker
Circuit
breaker
Circuit
breaker
Input wiring (TT, IT, DC)
L1
L2
L3
N
TT
DC
PE
-
+
IT
L3
L2
L1
Circuit
breaker
Circuit
breaker
Fuse
Terminal
Model
Recommended wire
gauge
(mm
2
)
(AWG)
Input
S8VK-WA24024
0.34 to 2.5
22 to 14
S8VK-WA48024
0.5 to 2.5
20 to 14
DC Output
S8VK-WA24024
2 to 2.5
14
S8VK-WA48024
3.5 to 6
12 to 10
Signal Output/COM
S8VK-WA
@@@
24
0.25 to 2.5
24 to 14
PE (protective
earth) terminal
S8VK-WA
@@@
24
2 to 2.5
14
Summary of Contents for S8VK-WA Series
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