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Maintenance and Servicing
106358_en_02 PHOENIX CONTACT
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5 Maintenance and Servicing
5.1 Maintenance Interval
The following maintenance intervals are recommended for this operating device:
5.2 Front Panel
Use a damp cloth to remove any dirt from the front panel. You also can use Isopropanol for
stronger pollutions.
5.3 Fuse
A semiconductor fuse is used to protect the device. Once the fuse has been tripped, the de-
vice must be disconnected from the supply voltage to allow the semiconductor fuse to re-
generate. At an ambient temperature of 20 °C (68 °F), the regeneration takes approximately
20 seconds. The higher the ambient temperature, the longer the regeneration takes.
5.4 Battery
The built-in battery supplies the real-time clock with power. The minimum battery life is 5
years, even under unfavorable operating conditions.
We recommend to change the battery approximately every 4 years as part of the regular
maintenance work by the service of Phoenix Contact.
Table 5-1 Maintenance interval
Maintenance work Interval
Changing the Battery 4 Years
NOTICE: Damage
The semiconductor fuse cannot be replaced!