Omron ZEN Operation Manual page 17

• Using the button switches.
• Changing bit status or parameter settings.
4. Double-check all wiring before turning ON the power supply.
Refer to Cycle Time Calculation Method on page 130 and confirm that the
5.
increase in the cycle time will not affect operation. If the cycle time is too long, it
may become impossible to read input signals accurately. The increase in the
cycle time will be particularly noticeable when set values are written in RUN mode
for a CPU Unit with communications (ZEN-10C4@R-@-V2).
Installation and Wiring
1. Do not allow the ZEN to fall during installation.
2. Be sure that the DIN Track mounting levers, Expansion I/O Units, Memory
Cassettes, Battery Units, cable connectors, and other items with locking devices
are properly locked into place. Improper locking may result in malfunction.
3. When mounting the ZEN to the surface of the control panel, tighten mounting
screws to the following torques.
CPU Units: 1.03 N⋅m max.
Expansion I/O Units: 0.46 N⋅m max.
4. Use wires with cross-sectional areas of 0.2 to 2.5 mm
AWG14) for wiring and strip them for 6.5 mm.
Handling
1. The environment of use of ZEN is "Pollution degree 2" and "Overvoltage category
II" specified in IEC60664-1.
2. Always use the ZEN within the rated ambient operating temperature and
humidity. The rated ambient operating temperature is 0 to 55°C for LCD-type
CPU Units and –25 to 55°C for LED-type CPU Units. If the ZEN is used near
sources of heat, such as a power supply, the internal temperature of the ZEN may
increase, lowering the durability of the ZEN.
3. Discharge static electricity from your body, e.g., by touching a grounded metal
plate, before touching any Unit.
4. The exterior of the Units will be damaged if it comes into contact with organic
solvents (e.g., benzene or paint thinner), strong alkalies, or strong acids. Never
allow such substances to come into contact with the Units.
5. Do not apply voltages exceeding the rated voltages. Internal elements may be
destroyed.
6. Short failures or open failures may result from the destruction of output elements.
Do not use loads that exceed the rated output current.
Maintenance
When replacing a CPU Unit, transfer to the new Unit and confirm all settings for clock
data, internal holding bits, holding timers, and counters before starting operation
again.
Transportation and Storage
1. Use special packaging boxes when transporting the ZEN and do not subject it to
excessive shock or vibration or drop it during shipment.
Precautions
2
(equivalent to AWG24 to
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