Function - Endress+Hauser Rns221 Mode D'emploi

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Warning! - Can lead to personal injury, safety risks or total damage
to the unit.

2 Function

The unit delivers two galvanically isolated voltages of 24 V DC. The maximum
current supplied, per output, is 30 mA. The outputs are electronically
monitored. The output voltage is stabilised to 24 V ± 10%, current is limited
to 38 mA on short circuit.
For communication with connected sensors using the HART
power supply circuit is fitted with an unit internal communication resistance
of 250 Ω. The HART
®
communication module can be connected to the front
mounted communication sockets.
LEDs in the unit front panel indicate the unit operation mode:
Green LED illuminated:
The unit is connected to the power source and is operational.
One or two yellow LEDs illuminate:
The power supply to the connected component(s) is on.
®
protocol, each
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