Technical Information TI 083R/24/ae Process display RIA 261 Digital loop powered field display for 4 to 20 mA current loops Features and Benefits • Loop powered display, no additional power supply cable required • 5 digit LC display, 1 inch (26 mm) character height • Trend bargraph in 10% increments • Rear illumination without additional power supply • Measurement range displayed from -19999 to +99999 • Flexible measurement range set up using 3 pushbuttons inside enclosure • Certification: - FM - CSA - ATEX • Two cable entries for wiring the measurement circuit • Interior space for installing additional measurement electronics, e.g. temperature transmitters • Housing can be lead sealed to protect against unauthorized entry Application Areas • Plant and machine construction • Field mounted applications • Laboratory fittings • Process display, monitoring • Suitable for intrinsically safe applications The Power of Know How RIA 261 Operation and system construction Measurement principle Field display application area The display measures an analog measurement signal and indicates this on the display. The display is connected in a 4 to 20 mA current loop and also derives the required power from the loop. The measurement influence of the voltage drop of < 2 V is almost negligible. The dynamic internal resistance (load) assures that the maximum voltage drop is never exceeded independently from the current loop. The analog signal at the input is digitized, analyzed and shown on the rear illuminated display. Measurement system Micro-controlled field mounted display with illuminated LC display. Setting up the measurement range, decimal place, and offset is done easily on an open unit using the three operational push buttons. Setting up during operation is also possible. The display rear illumination is always active and requires no further wiring for its energy requirement. Input Values Input type Current Measurement range 4 to 20 mA (polarity protected) Electrical specification • Voltage drop (load), < 2 V • Maximum input current (short circuit current), 150 mA Output Output signal The analog input signal (4 to 20 mA) is not converted. The input signal is digitized, analyzed and shown on the LC display. Fault signal Loss of measured value display, no rear illumination Transmission The indicator allows transmission of the HART® transmission protocol 2 Endress+Hauser RIA 261 Power supply Electrical connection Non hazardous area Terminals 2 and 4 linked internally I 2 3 4 - + + Y 1 Non hazardous area Hazardous area Terminals 2 and 4 linked internally 1 + 2 3 4 - + Y I + Intrinsically safe loop power supply - Field mounted display terminal layout 1 2 3 4 Terminal Measurement signal Connection terminal Measurement signal Connection terminal (+) 4 to 20 mA for further instrumentation (-) 4 to 20 mA for further instrumentation Input and Outputs Signal input Terminal Signal input Terminal Power supply The power supply is provided using the 4 to 20 mA current loop power. Voltage drop, < 2 V Cable entry Two 1/2” NPT cable entries, optional two PG 11 (M20) cable entries Accuracy Reference conditions T = 77°F (25°C) Measurement deviation < 0.1% of scaled analog range Influence of ambient temperature Temperature drift = 0.01%/K ambient temperature Application conditions (installation) Installation hints • Installation area, wall or pipe mounting (refer to accessories) • Installation angle, no limitations Application conditions (environment) Ambient temperature range 0° to +140°F (-20° to +60°C); for hazardous areas, refer to hazardous certificate Storage temperature range -15° to +160°F (-25° to +70°C) Ingress protection NEMA 4X (IP 66) Endress+Hauser 3 RIA 261 EMC immunity RF protection to EN 55011, Group 1, Class B Interference safety: ESD to IEC 1000-4-2, 6 kV / 8 kV Electromagnetic fields to IEC 1000-4-3, 10 V/m Burst (power supply) to IEC 1000-4-4, 4 kV Surge to IEC 1000-4-5, 1 kV Cable high frequency to IEC 1000-4-6, 10 V Mechanical construction Dimensions 6.89" (175) 2.56" (65) 3.15" (80) 4.21" (107) 1.57" (40) 6.42" (163) Enter push button (E) 2.05" (52) E + - Selection push buttons (+, -) Dimensions in inches (mm) • There is room available behind the hinged electronics for additional electronics, e.g. temperature head transmitter. Take note of manufacturers installation instructions! Internal dimensions: H = 2.4” (60 mm), W = 5.5” (140 mm), D = 1.2” (30 mm) • Housing can be lead sealed to prevent unauthorized entry. • GORE-TEX® filter is used as pressure compensation, fitted on the left of the conduit entries. Weight < 1 lb (approximately 0.80 kg) Materials Housing, die cast aluminum, epoxy coated with glass insert Wall/stand pipe mounting kit and tension strip, 304 SS. Wire terminals • Plug on screw terminals, terminal size 16 AWG (1.5 mm2) for solid core and 18 AWG (1.0 mm2) for stranded with ferrule. • Earth ground connection (on the housing exterior), 14 AWG (2.5 mm2). 4 Endress+Hauser RIA 261 Display and operating elements Display elements • Display 5-digit LCD, 1” (26 mm) character height, rear illuminated. Bargraph display in 10% increments, markers for over / under range display. • Display range -19999 to 99999 • Offset -19999 to 32767 • Operation 3 push button operation (- / + / E) integrated in the unit, access when unit is opened • Signals measurement range over / under value • Rear illumination illumination brightness increases with an increase in loop current. Certificates and approvals CE mark By attaching the CE mark, Endress+Hauser confirms that the instrument fulfills all the requirements of the relevant EC directives (89/336/EWG). Approvals • FM approved intrinsically safe Class I, Division 1, Group A, B, C, D • CSA approved intrinsically safe Class I, Division 1, Group A, B, C, D • ATEX II 1 G EEx ia IIC T6 Details regarding the availability of the intrinsically safe versions (FM, CSA, ATEX, etc.) can be obtained from Endress+Hauser. Relevant data for application protection can be found in separate documentation, available upon request. Endress+Hauser 5 RIA 261 Accessories Wall / pipe mounting kit Wall and / or pipe mounting kit, 304 SS with tension strap for pipe mounting. Order Number: SONDST-AA B 2.99" 1.57" (76) (40) A 5.51" (140) 6.77" (172) (B) Wall / pipe mounting kit (dimensions in inches (mm) Supplemental documentation 6 • Process display, RIA 261 operating manual • Ex documentation for FM, CSA, ATEX, etc. BA 111R/09/a3 XA 007R/09/a3 Endress+Hauser RIA 261 Ordering information RIA 261 process display 1-channel, scale adjustable for connection to 4 to 20 mA current loop circuit, LC display with 5-digits, 1” (26 mm) character height, bargraph with 10% resolution, over/under range, operation using three push buttons, access on opened unit. 1 2 3 RIA 261 1 2 3 Endress+Hauser Certification A Version for non-hazardous areas B ATEX II 1 G EEx ia IIC T6 C FM IS, Class 1, Div. 1, Grps. A, B, C, D D CSA Ex ia, Class 1, Div. 1, Grps. A, B, C, D Model 1 Field housing with PG 11 conduit entries 2 Field housing with 1/2” NPT conduit entries Additional features K Without accessories, North American region L Wall / pipe mounting kit, North American region 3 Factory calibration certificate 4 Factory calibration certificate and mounting kit 7 For application and selection assistance, in the U.S. call 888-ENDRESS For total support of your installed base, 24 hours a day, in the U.S. call 800-642-8737 Visit us on our web site, www.us.endress.com United States Canada Mexico Endress+Hauser, Inc. 2350 Endress Place Greenwood, IN 46143 Tel. 317-535-7138 Sales 888-ENDRESS Service 800-642-8737 Fax 317-535-8498 email@example.com www.us.endress.com Endress+Hauser Canada 1075 Sutton Drive Burlington, ON L7L 5Z8 Tel. 905-681-9292 800-668-3199 Fax 905-681-9444 www.ca.endress.com Endress+Hauser Paseo del Pedregal No. 610 Col. Jardines del Pedregal 01900, Mexico D.F. MEXICO Tel. 525-568-2405 Fax 525-568-7459 Endress+Hauser The Power of Know How TI 083R/24/ae/08.04 © 2004 Endress+Hauser, Inc.
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