Endress+Hauser RIA 261 Manuale
TI083R/09/en
51002768
Technical information
Field 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, 26 mm height
• Trend bargraph in 10% steps
• Rear illumination without additional power supply
• Measurement range displayed from -19999 to 99999
• Flexible measurement range set up using three push
buttons
•Certification
- ATEX
- FM
- CSA
• GL Germanischer Lloyd Marine approval
• Two cable entries for wiring the measurement circuit
• Space for installing additional measurement electron-
ics, e.g. temperature head transmitters
• Housing can be lead sealed
• Protection class IP66/NEMA 4X
•GORE-TEX
®membrane for pressure compensation
Application
• Plant and machine construction
• Field mounted applications
• Laboratory fittings
• Process display, monitoring
• Suitable for Ex application
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Function and system design
Measuring principle
Example for field display application area
The display measures an analogue measurement signal and indicates this on the display. The display is con-
nected in a 4 to 20 mA current loop and also derives its supply from the loop. The volt drop is almost negligible
(< 2.5 V). The dynamic internal resistance (load) makes sure that independently from the loop current, the
maximum volt drop is never exceeded. The analogue signal at the input is digitised, analysed and shown in the
rear illuminated display.
Equipment architecture Micro-controller controlled field mounted display with illuminated LC display. Setting up measurement range,
decimal point and offset of the display is easily done on an open unit using the three operational push buttons
fitted. Setting up during operation is possible. The rear illuminated display is always active and needs no further
wiring for its energy requirement.
Input
Measured variable Current
Measuring range 4 to 20 mA (polarity protected)
Electrical specifications • Volt drop (load)
< 2.5 V
• Max. input current (short circuit current)
200 mA
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Output
Output signal The analogue input signal (4 to 20 mA) is not converted. The input signal is digitised, analysed and shown in
the LC display.
Signal on alarm No measured value seen in the LC display, no rear illumination.
Transmission behaviour The display allows transmission of the HART®transmission protocol.
Auxiliary energy
Electrical connection
Field mounted display terminal layout
Supply voltage The power supply is done using the 4 to 20 mA current loop power.
Volt drop:
< 2.5 V
Cable entry 2 x M20 cable entries
Alternative:
2 x ½" NPT cable entries
Terminal In- and outputs
1Measurement signal (+) 4 to 20 mA Signal input
2Connection terminal for further instrumentation Terminal
3Measurement signal (-) 4 to 20 mA Signal input
4Connection terminal for further instrumentation Terminal
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active
passive
RIA261
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Performance characteristics
Reference conditions T = 25 °C
Maximum measured error < 0.1% of scaled analogue range
Non-repeatability Not specified
Influence of ambient
temperature
Temperature drift = 0.01%/K ambient temperature
Operating conditions
Installation instructions • Installation area: Wall or pipe mounting (see Accessories)
• Installation angle: No limitations
Environment
Ambient temperature range −20 to +60 °C (for Ex areas, see Ex certificate)
Ambient temperature limits See ambient temperature range
Storage temperature -25 to +70 °C
Climate class To IEC 60654-1, Class D1
Degree of protection IP66, NEMA 4X
Shock resistance 7 Nm housing, 4 Nm glass to IEC 60079-0
Vibration resistance Not specified
Electromagnetic compatibility RF protection
To EN 55011 Group 1, Class B
Interference safety
• ESD to IEC 61000-4-2, 6 kV/ 8 kV
• Electromagnetic fields to IEC 61000-4-3, 10 V/m
• Burst (power supply) to IEC 61000-4-4, 4 kV
• Surge to IEC 61000-4-5, 1 kV
• Cable high frequency to IEC 61000-4-6, 10 V
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Endress+Hauser 5
Mechanical construction
Design, dimensions
Unit dimensions in mm
Dimensions for wall mounting holes (lower picture) in mm
• There is room available behind the hinged electronics for additional electronics e.g. temperature head trans-
mitter. Take note of manufacturers installation instructions!
Internal dimensions: H = 60 mm, W = 140 mm, D = 30 mm
• Housing can be lead sealed
•GORE-TEX
®membrane used as pressure compensation fitted to the left of the cable entries
Weight Approx. 800 g
Material Housing
Die cast aluminium epoxy coated with glass insert
Wall/stand pipe mounting kit and tensioning tape
1.4301 stainless steel
Terminals • Plug in screw terminals inside the housing in order enable loop current connection:
Plug on screw terminals, terminal size 1.5 mm² solid core, 1.0 mm² stranded with ferrule
• Earth (ground) connection on housing exterior: Terminal range 2.5 mm²
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Human interface
Display elements •Display
5 digit LC display, 26 mm character height, rear illuminated
Bargraph display in 10% steps, markers for over/under range display
• Display range
-19999 to +99999
• Offset
-19999 to +32767
• Operation
Three 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
4The measurement system fulfils the legal requirements laid out within the EU regulations 89/336/EWG.
Endress+Hauser acknowledges successful testing of the unit by adding the CE mark.
Ex approval Details regarding the availability of the Ex versions (ATEX, FM, CSA, etc.) can be obtained from your local E+H
sales organisation. All relevant data for Ex protection can be found in separate Ex documentation, which can
be requested separately.
Ordering information
Product structure
Process Display RIA261, Field
Electronic indicator.
Loop powered.
1 channel, presettable scale.
Display LC, 5 digit, char. height 26mm.
Bargraph -10...110%.
Approval: GL (German Lloyd) Marine.
Rear-illuminated display.
Approval:
A Non-hazardous area
B ATEX II2(1)G EEx ia IIC T6
C FM IS, NI Cl.I / 1,2 Gr.ABCD T6
D CSA Cl.I, Div 1,2 Gr. ABCD T6
E ATEX II3G EEx nA IIC T6
Housing; Cable entry:
1 Alu IP66 NEMA4x; gland M20
2 Alu IP66 NEMA4x; thread NPT 1/2
Additional option:
1 Basic version
2 Mounting bracket, wall / pipe
3 Works calib. certif.
4 Mounting bracket, wall / pipe + WCC=Works calib. certif.
RIA261- ⇐Order code
RIA261
Endress+Hauser 7
Accessories
Wall and stand pipe mounting kit, pos. B (with tension tape installation, pos. A)
Order number 51003502
Further documentation
• Operating manual process display RIA 261 (BA111R/09/)
• Ex additional documentation: ATEX (XA007R/09/a3) FM, CSA, etc.
• Brochure "System Components" (FA016K/09/en)
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Subject to modification
International Head Quarter
Endress+Hauser
GmbH+Co. KG
Instruments International
Colmarer Str. 6
79576 Weil am Rhein
Germany
Tel. +49 76 21 9 75 02
Fax +49 76 21 9 75 34 5
www.endress.com
[email protected]dress.com
TI083R/09/en/05.05
51002768
FM+SGML 6.0
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