Battery For The Real-Time Clock (Rtc); Galvanic Isolation Barriers - Danfoss VACON 100 INDUSTRIAL Operating Manual

Operating Guide | VACON® 100 Wall-mounted Drives Control Unit

7.7 Battery for the Real-Time Clock (RTC)

To use the real-time clock (RTC), a battery must be installed in the left side of the control unit. See 7.1 Control Unit Components. Use a
½ AA battery with 3.6 V and a capacity of 1000–1200 mAh. Use, for example, a Vitzrocell SB-AA02 battery.
The battery lasts approximately 10 years. See more about the functions of the RTC in the application guides.

7.8 Galvanic Isolation Barriers

The control connections are isolated from the mains. The ground terminals are permanently connected to the I/O ground.
The digital inputs on the standard I/O board can be galvanically isolated from the I/O ground. To isolate the digital inputs, use the DIP
switch that has the positions FLOAT and GND. See 7.3.2 Isolation of the Digital Inputs from Ground.
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