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Please observe the following precautions for safe use of this products.
Circuit Design
1.
All interface connectors and battery connector are live parts, they may not be directly connected to Softy Extra
Low Voltage (SELV) circuit or to accessible conductive parts.
For the programming units and Personal Computers use only the ZEN-CIF01 Connecting Cable (optional
accessory) manufactured by OMRON.
ZEN-CIF01 provides safe (reinforced) insulation between Personal Computers and ZEN.
2.
Provide emergency stop circuits, external interlock circuits, limit circuits, and other safety circuits in addition to
any provided within the ZEN control circuits to ensure safety of the overall system in the event of ZEN failure or
external factors.
3.
If the ZEN discovers an error during self-diagnosis, operation will be stopped and all outputs will be turned OFF.
As a countermeasure for such problems, external safety measures must be provided to ensure safety in the
overall system.
4.
Outputs from the ZEN may remain ON or OFF due to faults in internal circuits such as output relay fusing or
burning, or output transistor destruction. As a countermeasure for such problems, external safety measures
must be provided to ensure safety in the overall system.
5.
Fail-safe measures must be taken by the user to ensure overall system safety in the event of broken signal lines
or momentary power interruptions.
6.
The durability of the output relays is largely affected by the switching conditions. Confirm the operation of the
system under actual operating conditions and set the switching frequency to ensure that adequate performance
will be provided. Insulation faults and burning in the ZEN may result if relays are used after their performance
has deteriorated.
Connecting Expansion I/O Units
1.
Supply power to both the CPU Unit and Expansion I/O Units from the same power supply and turn them ON
and OFF at the same time.
2.
When connecting Expansion I/O Units with DC inputs to a CPU Unit with an AC power supply, the burst noise
immunity will be 1 kV (IEC 61000-4-4).
3.
Expansion I/O Units with AC inputs (ZEN-8E1AR) cannot be connected to a CPU Unit with a DC power supply.
System Startup and Program Changes
1.
Check the user program for proper execution before actually running it on the Unit.
2.
Disconnect the output lines from the system before testing operation in any system in which incorrect operation
can result in injury or equipment damage.
3.
Confirm safety before attempting any of the following operations.
• Changing the operating mode (RUN/STOP).
• 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 in the ZEN Programmable Relay Operation Manual (Cat.
5.
No. Z211) and confirm that the 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
them for 6.5 mm. If using stranded wires, always connect straight crimp terminals (0.25 to 2.5 mm
Handling
1.
The environment of use of ZEN is "Pollution degree 2" and "Overvoltage category II" specified in IEC60664-1.
x
Precautions for Safe Use
2
(equivalent to AWG24 to AWG14) for wiring and strip
Precautions
2
).
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