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4-3
System design precautions
Unstable power sources or noise may result in malfunctions or false alarms.
•
Use a stable power source.
Note that the product’s external output and alarm contacts may activate while the system
stabilizes at power-on or in the event of an instantaneous power failure. In such cases, either
use a UPS (uninterruptible power system) or take appropriate measures on the side
receiving the power.
Supply this product with a power source that meets the following requirements:
Power supply
12 - 24 V DC ± 20 %
Power consumption
72 W Max.
•
Use the alarm contacts correctly.
The alarm contacts on this product are designed to transmit signals that activate external
buzzers and alarm indicators. Do not use for control purposes—for example, do not use to
control shutoff valves.
A de-energized b contact (break contact) may cause a momentary open operation due to an
external force or other physical impact.
If a b contact is used as an alarm contact, implement measures to account for such momentary
operations—for example, adding a delay operation (of approximately one second) to the signal
on the b contact receiving side.
4-4
Installation procedure
The product is designed to be mounted on a DIN rail or wall.
For more information, refer to the Ewon Flexy 205 Specifications.
