
[SM-P00121-A]
−
12
−
2
PRECAUTIONS
2. PRECAUTIONS
To correspond to the requirements of the relevant EC Directive, use AC/DC adapter (e.g., switching power
supplies) complying with EMC standards for the valve and communication power supplies.
Before turning the power ON or OFF, ensure the safety of the surroundings as the components in the system,
including the valve (cylinder), may move unexpectedly.
Refer to the user’s manual provided with the master unit concerning the communication delay time.
The transmission delay within the entire system depends on the scan time achieved by the PLC and on
other devices included in the system.
Solenoid valve response time varies by the model. Refer to the valve specification for the delay in
response time.
The time it takes for the solenoid valve to turn OFF is delayed by approximately 20 msecs since there is a
surge absorbing circuit incorporated in the slave unit.
Make sure the power cables and network cables are connected according to the specifications to avoid
any incorrect wiring.
Do not subject the power cables and network cables to tension and impact.
Before turning the power ON, make sure that all cables and connectors are connected firmly.
Never attempt to disassemble, modify, and/or repair the slave unit. Doing so may result in failure or
malfunction of the slave unit.
Do not drop, apply unusual vibration or impact the unit as the inside of the slave unit is a precision
construction.
Do not connect or disconnect any connectors while the power is being supplied. Doing so may result in
failure or malfunction.
Mold and rust can develop on the product if it is exposed to high humidity during transportation. Include
moisture absorbers and tightly seal the package.
Install the slave unit at least 200 mm away from high-voltage cables and power lines, or lay the
high-voltage cables and power lines in grounded metal tubings.