4.10 Connecting auxiliary communication devices
To avoid surges to the DMU, use an isolator when connecting a data
cable from the DMU to an auxiliary device that has electrical connections
outside the DGA monitor.
CAUTION!
Vaisala does not take responsibility for any disturbances to the measuring
performance of Optimus DGA monitor caused by 3rd party devices.
Liability for customer installed devices is not covered by Vaisala.
Only devices with 24 V DC input voltage and maximum class B electromagnetic
interference (EMI) are allowed to be installed inside the DGA monitor.
Make sure the auxiliary device complies with local safety and EMC regulations.
Follow these instructions to correctly and safely connect an auxiliary connection device such
as a modem or optical network unit into the DGA monitor. The maximum power rating of the
auxiliary device is 48 W (2 A).
Chapter 4 – Electrical installation
57
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