Nivus NFP, Инструкция по эксплуатации

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Installation and Connection
NFP - rev. 04 / 23.05.2018 page 29
Fig. 20-5 Connection of a flow velocity sensor Type POA Non-Ex version
20.6 NFP Power Supply
Depending on the type of NFP used, it can be supplied with 100…240 V AC or with 24 V DC
(see chapter “15 Specifications”).The two slide switches (located above the terminals) serve
as additional power switches.
Fig. 20-6 Slide switch position in terminal clamp housing
Operation with AC voltage / DC voltage
A DC unit can be operated exclusively with 24 V (±15 %) DC voltage.
An AC unit can be operated exclusively with 100…240 V (+10 % / -15 %) AC voltage.
When operated with alternating current, the direct current supply clamps 4 and 5 both provide
a voltage of 24 V and max. capacity of 100 mA (turn on 24 V switch!).
Please note, when using this supply voltage (e. g. for digital inputs with control signals), it
must not be shielded through the complete switchgear in order to maintain disturbing interfer-
ences on a low level.