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Technical DatasheetTD 00012E/24/EN/01.13

• 3-key operation•Highly legible five-digit LC-display• For connection to 4 to 20 mA

circuits

Complete product information:www.e-direct.us/ria251

Specs at a glance:

•Voltage drop: < 2 V•Display: 5 digit LC display•Protection: IP 65•Accuracy: < 0.1% of display

range

Digital loop-powered display

RIA251

$ 233.00

RIA251 2

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Application / Function

Application The RIA251 process display monitors measurement signals and displays them with high resolution and accuracy. It can be easily installed in switch cabinets, control rooms, with laboratory equipment, plant and equipment facilities.

Function The process display module is directly connected to the 4 to 20 mA measurement circuit. Parameters such as the measurement range can be set using the three pushbuttons on the face of the unit. Parameter setting is possible during operation. The readings are shown on a five-digit, seven-segment LC display.

Applicationexample

System component without own transmitter loop power supply, e.g. printers, displays, PLC…

Setting up transmittersusing HART®communication

Active barrier RN221N

RIA251as front end display

Temperature sensor with electronic insert TMT181/182

Zone

RIA251 3

Application / FunctionOverview

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DimensionsTechnical data

Technicaldata Dimensions(ininches)

InputInput 4 to 20 mA (reverse-polarity protection)Measured parameter CurrentMax. input current 150 mA (short circuit current)Accuracy < 0.1 % of full scaleTemperature drift < 0.01 %/10K

OutputVoltage drop < 2 VHART® The display allows transmission of the

HART® transmission protocol

Operating conditionsAmbient temperature -20 to +60 °C (-4 to +140 °F)(Ex/non Ex)Storage temperature -30 to +70 °C (-22 to +158 °F)Climate category to standard EN 60654-1 Class B2EMC Interference emission to EN 5011 Group 1,

Class A; interference immunity to EN 61000-4-2 up to 61000-4-6

Protection Front IP 65, terminals IP 20

Panel cutout

1.77

3.62

1.89

3.78

Mechanical constructionMaterials Front of housing: Die-cast aluminium;

housing tube: galvanized steel plate; rear panel of housing: ABS plastic

Electrical connection Plug-in screw terminals (can be fixed permanently), terminal area 1.5 mm², solid, 1.0 mm² strand with threaded sleeve

User interfaceDisplay 5-digit LC display, 17 mm (0.67”) range of

display: -19000 to +99999Operation 3 buttons

Power supplySupply Via 4 to 20 mA loop supply

ApprovalsEx approval ATEX II 1 G EExia IIC T6

RIA251 4

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Pricetable

Process indicator RIA251 Order no. Price/pcs. in USDApproval 1 to 5 6 to 10 11 to 35Non-hazardous area RIA251-A1 265.00 246.00 233.00ATEX II1G EEx ia IIC T6 RIA251-B1 309.00 287.00 272.00Prices valid until 09.30.2013 in U.S. dollars per unit (not including shipping and applicable sales tax).See Endress+Hauser, Inc. Terms and Conditions of Sale for shipping, tax, and payment terms.

Complete product information:www.e-direct.us/ria251

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Contact

E-directEndress+Hauser, Inc.2350 Endress PlaceGreenwood, IN 46143

Direct order

Internet www.e-direct.usby phone 888- EH-DIRECT

(343-4732)per Fax 317-535-8498E-Mail e-direct@us.endress.com