SMC Networks S0700 Series Manual page 68

Series
Specific Product Precautions 6
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.
Caution
1. Be careful of miswiring. This can cause malfunction, damage and fire in the unit.
Avoid using these products in machinery/equipment which affects human safety, and in cases where malfunction or failure can result
in extensive damage.
2. Do not connect cables during energizing.
This could damage or cause malfunction to the SI unit.
3. To prevent noise and surge in signal lines, keep all wiring separate from power lines and high voltage lines. Other-
wise, this can cause malfunction.
4. Check wiring insulation, as defective insulation can cause damage to the unit due to excessive voltage or current.
5. Do not bend or pull cables repeatedly, and do not place heavy objects on them or allow them to be pinched. This can
cause broken lines.
Warning
1. Use within the allowable voltage range.
Using beyond the allowable voltage range is likely to cause the
units and connecting devices to be damaged or to malfunction.
2. Do not use beyond the specification range.
Using beyond the specification range is likely to cause a fire,
malfunction, or breakdown in the units and connecting devi-
ces. Check the specifications before handling.
3. Establish a backup system beforehand, which employs
fail-safe concepts such as multiple equipment and de-
vices to prevent breakage or malfunction of this prod-
uct.
4. Provide an external emergency stop circuit that will im-
mediately stop an operation and cut off the power sup-
ply.
5. When using for an interlock circuit:
• Provide a double interlock which is operated by another sys-
tem (such mechanical protection function).
• Perform an inspection to check that it is working properly be-
cause it can cause possible injuries.
676
S0700
Serial Wiring EX500/EX250 Precautions
Safety Instructions for Cable
Serial Wiring EX510 Precautions
Caution on Design and Selection
Caution
1. Keep the surrounding space free for maintenace.
When designing a system, take into consideration the amount
of free space needed for performing maintenance.
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
3. This product is one of the components to be equipped
into a final equipment. Confirm the adaptability to the
EMC directive as the whole equipment by customers
themselves.
4. The power supply for the Gateway unit should be 0 V
as the standard for both power supply for outputs as
well as inputs and for the control unit of the Gateway.
+24 V
Power supply
for output
0 V
Power supply for
the input and for
the control unit
of the Gateway
+24 V
Max. current rating
5.0
100
Peak voltage value
+24 V
Power supply
for output
0 V
Power supply for
the input and for
the control unit
of the Gateway
–24 V