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Series
Specific Product Precautions 5
Be sure to read before handling.
Refer to front matters 58 and 59 for Safety Instructions and pages 3 to 7 for 3/4/5 Port
Solenoid Valve Precautions.
Warning
1. These products are intended for use in general factory
automation equipment.
Avoid using these products in machinery/equipment which af-
fects human safety, and in cases where malfunction or failure
can result in extensive damage.
2. Do not use in an explosive atmosphere, environment
with inflammable gases, or corrosive atmosphere.
This can cause injury or fire, etc.
3. Work such as transporting, installing, piping, wiring,
operation, control and maintenance should be per-
formed by personnel with specialized knowledge.
There is a danger of electrocution, injury or fire, etc.
4. Install an external emergency stop circuit that can
promptly stop operation and shut off the power sup-
ply.
5. Do not remodel these products, as there is a danger of
injury and damage.
Caution
1. Read the instruction manual carefully, strictly observe
the precautions and operate within the range of the
specifications.
2. Do not drop these products or submit them to strong
impacts. This can cause damage, failure or malfunc-
tion, etc.
3. In locations with poor electrical conditions, take steps
to ensure a steady flow of the rated power supply. Use
of a voltage outside of the specifications can cause
malfunction, damage to the unit, electrocution or fire,
etc.
4. Do not touch connector terminals or internal sub-
strates when current is being supplied. There is a dan-
ger of malfunction, damage to the unit or electrocution
if connector terminals or internal substrates are tou-
ched when current is being supplied.
Be sure that the power supply is OFF when adding or remov-
ing manifold valves or input blocks, etc., or when connecting
or disconnecting connectors.
5. Operate at an ambient temperature that is within the
specifications. Even when the ambient temperature
range is within the specifications, do not use in loca-
tions where there are rapid temperature changes.
6. Keep wire scraps and other extraneous material from
getting inside these products. This can cause fire, fail-
ure or malfunction, etc.
7. This product is not constructed to withstand water or
oil penetration. Therefore it should be fitted with a pro-
tective cover when used in environments where it
could be exposed to water or oil splash.
8. Observe the proper tightening torque.
There is a possibility of damaging threads if tightening ex-
ceeds the tightening torque range.
9. Adjustment / Operation
DIP switches and rotary switches should be set with a small
watchmakers screwdriver.
S0700
Serial Wiring EX500/EX250 Precautions
Caution
10. Provide adequate protection when operating in loca-
tions such as the following:
• Where noise is generated by static electricity, etc.
• Where there is a strong electric field
• Where there is a danger of exposure to radiation
• When in close proximity to power supply lines
11. When these products are installed in equipment, pro-
vide adequate protection against noise by using
noise filters, etc.
12. Since these products are components that are used
after installation in other equipment, the customer
should confirm conformity to EMC directives for the
finished product.
13. Do not remove the name plate.
14. Perform periodic inspections and confirm normal op-
eration. It may otherwise be impossible to guarantee
safety due to unexpected malfunction or erroneous
operation.
Safety Instructions for Power Supply
Caution
1. Operation is possible with a single power supply or a
separate power supply. However, be sure to provide
two wiring systems (one for solenoid valves, and one
for input and control units).
2. Use the following UL approved products for DC power
supply combinations.
1) Controlled voltage current circuit conforming to UL508
Circuit uses the secondary coil of an isolated transformer
as the power supply, satisfying the following conditions.
• Max. voltage (with no load): 30 Vrms (42.4 V peak) or less
• Max. current: (1) 8 A or less (including shorts), and
(2) When controlled by a circuit protector
(fuse, etc.) with the following rating
No-load voltage (V peak)
0 to 20 [V]
Over 20 [V] to 30 [V]
2) A circuit (class 2 circuit) with maximum 30 Vrms (42.4 V
peak) or less, and a power supply consisting of a class 2
power supply unit confirming to UL1310, or a class 2 trans-
former confirming to UL1585
SJ
SY
SV
SYJ
SZ
VP4
S0700
VQ
VQ4
VQ5
VQC
VQZ
SQ
VFS
VFR
VQ7
Max. current rating
5.0
100
Peak voltage value
675
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