Endress+Hauser Preline RN 221N Betriebsanleitung Seite 23

4 Technical data
Operation and system construction
Measuring Active barrier with power supply for safe separation of 4...20 mA current
principle signal circuits. The unit has an optional intrinsically safe input. The
current transmitted from the transmitter to the input circuit (4...20 mA) is
linearly transmitted to the output.
Measurement The unit creates a safe galvanic isolation between input and output of
system the circuits. Separation between hazardous and non-hazardous areas is
available as an option. A built-in loop power supply can supply
connected sensors with the necessary energy. A current signal is
available at the output (passive output) for connection to further
instrumentation. Bi-directional HART
transmitters is possible using the built-in communication sockets (with
resistance R = 250 Ω).
Inputs
Number of inputs 1
Power
17.6 V ± 0.2 V
requirement
Open circuit
26 V ± 5%
voltage
Short circuit
≤ 32 mA
current
Internal
328 Ω
resistance
Over range 10%
Option intrinsically safe input
Open circuit
27.3 V
voltage
Short circuit
84.1 mA
current
Power
576 mW
consumption
Capacitance
86 nF [EEx ia] IIC, Cl. I, Div. 1, Gr. AB
Inductance 5.5 mH [EEx ia] IIC, Cl. I, Div. 1, Gr. AB
[1] Peak values in fault condition
®
-communication with SMART
(at I = 20 mA)
[1]
683 nF [EEx ia] IIB, Cl. I, Div. 1, Gr. C
[EEx ia] IIA, Cl. I, Div. 1, Gr. D
20 mH [EEx ia] IIB, Cl. I, Div. 1, Gr. C
[EEx ia] IIA, Cl. I, Div. 1, Gr. D
Acctive barrier
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