Process indicator with control functionalities

Process display with digital output, monitoring and pump control functions


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    • Input with two-wire loop power supplyand intrinsic safety option

    • Pump control function

    • Digital output with integration

    Specs at a glance

    Display 7-digit/14 segment multicolored

    FM AIS I, II, III;

    CSA (Ex ia) I, II, III optional

    Standard Dimensions 96 × 96 mm (3.78" × 3.78")
    Relays 4 or 8 (optional)
    Function Linearization, pump control function, integration
    Output Optional 1 × analog output

    Process indicator RIA452

    Product / VersionPrice / pcs. in USDOrder code
    ApprovalMeasuring SignalOutput1 to 34 to 1011+
    Non-hazardous area0/4-20mA4x relay SPDT limit792.-736.-697.- RIA452-A111A11A
    4x relay SPDT limit + 1x analogue U,I851.-792.-749.- RIA452-A112A11A
    Universal U,I,R,RTD,TC4x relay SPDT limit887.-825.-780.- RIA452-A121A11A
    4x relay SPDT limit + 1x analogue U,I946.-880.-833.- RIA452-A122A11A
    ***ATEX II(1)GD(EEx ia)IIC / FM AIS I,II,III/1/ABCDEFG / CSA (Ex ia)I,II,III/1/ABCDEFG0/4-20mA4x relay SPDT limit859.-799.-756.- RIA452-x111A11A
    4x relay SPDT limit + 1x analogue U,I918.-854.-808.- RIA452-x112A11A


    Product / VersionPrice / pcs. in USDOrder code
    Configuration kit TXU10- for PC-programmable devices. set-up programme+interface cable for PC with USB-Port. 4 pin plug + ReadWin2000149.23 TXU10-AA

    Prices valid until 31.12.2020 in USD per unit (not including shipping and applicable sales tax). See
    Endress+Hauser Terms and Conditions

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  • Application

    The RIA452 process display interprets and displays process signals with high resolution and accuracy. It can also be used to automate control tasks via limit values or analogue and digital outputs.


    Up to eight presettable relays monitor the measured value for any infringement (undershooting/overstepping) of the preset limit values. Further operation modes for the relays are sensor or device errors, batch and pump control functions (e.g. alternating pump control). The scalable analog output offers wide options to transfer the input signal: zoom function, linearization, offset, inverting and signal conversion (conversion in-/output). The optional impuls output offers the possibility to create integrated process values. Simple setting up using a serial interface and PC programme or manually using the configurating dial on the front of the unit.

    Application example

    Process indicator RIA452 application example
  • Technical data

    Analog input 1 × 0/4 to 20 mA (impedance 5 Ω)
    Universal input

    0/4 to 20 mA, 0 to 5 mA, ±40 mV, ±150 mV, ±600 mV, ±2,5 V, 0 to 10 V, 0 to 5 V, ±10 V, 30 to 3000 Ω resistance  thermometer Pt100/500/1000, Cu50/100, Pt50 thermocouple types J, K, T, N, B, S, R to IEC 584; D, C to ASTM E998; L to DIN 43710, GOST

    Digital input 4×, max. 10 Hz
    Accuracy 0.1 % of the measurement range end value
    Transmitter supply 24 V DC, 250 mA, on option intrinsically safe 1 × 24 V DC, 22 mA in addition
    Analog output 1 × 0/4 to 20 mA, 0 to 10 V DC
    Output impedance Max. ≤ 600 Ω
    Digital output

    1 × open collector passive 12.5 kHz 4 × relays (changeover contact), 250 V AC/30 V DC, 3-A;

    expandable to 8 relays (option)

    Linearity ≤0.1 % of the measurement range end value
    Operating conditions
    Ambient temperature –20 to +60 °C (–4 to 140 °F)
    Storage temperature –30 to +70 °C (–22 to 158 °F)
    Climatic class To IEC 60 654-1 class B2 bedewing is forbidden
    EMC Interference immunity to IEC 61326 (industrial environment) and NAMUR NE 21; interference emissions to IEC 61326 Class A
    Ingress protection Front IP 65, Terminals IP 20
    Power supply
    Supply voltage

    90 to 250 V AC, 50/60 Hz

    20 to 36 V DC / 20 to 28 V AC, 50/60 Hz

    Mechanical construction
    Electrical connection Plug on screw terminals, size 1.5 m² solid, 1.0 mm² multi with ferrule
    Materials used

    Housing front: ABS plastic, electro-plated

    Housing casing: PC10GF plastic

    User interface

    7 digit 14-segment LC-display in white (10 mm / 0.39”);

    engineering unit with 9 × 77 Dot Matrix display;

    42-parts bargraph in yellow with over- and under range in red;

    limit value markings in yellow;

    status display

    Range of display –99999 to +99999
    Operation via Jog-Shuttle or using RS232 and PC software ReadWin® 2000
    Features Linearization with 32 points, elapsed hour indicator, alternating pump control, tendency analysis, batch-function, integration, min/max value storage
    Ex approval


    CSA (Ex ia) I, II, III/1/ABCDEFG

    Dimensions in mm (inches)

    Dimensions of a RIA452 process indicator

    Installation according to instruction manual

    Electrical connection

    Current input

    Wiring a RIA452 process indicator

    a) Current input (Clamps 12 and 82 are linked internally)

    b) Loop power supply Max. 22 mA Input 0 to 20 mA

    c) Input 0 to 20 mA

    d) Relay output

    e) Relay 1-8: 250 V AC/ 30 V DC

    f) Analog output 0 to 20 mA, 0 to 10 V DC

    g) Loop power supply 24 V, <= 250 mA

    h) Digital inputs to DIN 19240

    i) Digital output, passive open collector max. 24 V, 200 mA

    Universal input

    a) Current input 0 to 20 mA

    b) Voltage input +/– 1 V

    c) Voltage input +/– 30 V

    d) Thermocouples

    e) RTD 4-wire

    f) RTD 3-wire

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