Technical Data - Endress+Hauser RMA 422 Mise En Service

8. Technical data

Application Process transmitter Universally presettable transformer of current signals from
Operation and Measurement
system principle
construction
Measurement
system
Inputs Input type
Measurement range Current: 0 to 20 mA (0 to 22.0 mA)
Scale
Offset
Signal damping
Number
A/D-resolution
Isolation voltage
Linearisation
Integration time
Output
Loop power supply
Output signal
Communication
resistance
Number
Galvanic isolation
Analogue
Output signal
Voltage
Current
Signal source
Scale/zoom
pressure, level, flow and temperature measurement with
signal monitoring and retransmission.
The connected analogue signals are digitalised and
transformed into engineering units.
Using the basic mathematics operators such as
addition/subtraction/ multiplication a further process value can
be calculated in addition to the two input values. Using digital
analogue convertors two analogue outputs proportional to the
process values are made available as either voltage or current
signals. These can be used for transmission to further
instrumentation or peripheral equipment.
Additionally an LC display and alarm set point relays round off
the system.
Microcontroller controlled measurement system with LC
display, analogue in/outputs, alarm relays and loop power
supply including HART communication connections
Current
4 to 20 mA (3.85 to 20.5 mA);
max. Current: 50 mA (without damage)
Ri: 205 Ohm
-19999 to +99999, 0 to 4 decimal points
-19999 to +99999, 0 to 4 decimal points
Low pass 1st level, Filter constant 0 to 99 s
max. 2
13 bit
375 V between inputs
AC/DC
Possible using max. 20 linearisation points per analogue inputs.
40 ms for 2 channels
17.0...19.7 V, 22 mA; U
max
The resistors required for HART
max. 2
To all other current circuits
0/4...20 mA, 20...4/0 mA or 0...10 V, over range + 10 %
max. load: 20 mA
Resistance max. 500 Ohm
Input 1, Input 2, mathematics process values
Presettable between 0 and 100% of the signal
Process transmitter
27.3 V

communication are installed.
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