Endress+Hauser RIA14 Technical Information
Products Solutions Services
TI00143R/09/EN/04.14
71256618
Technical Information
RIA14
Loop powered field indicator
With explosion proof enclosure (according to Ex d)
Application
• Oil & gas
• Petrochemical industry
• System and apparatus engineering
• Outdoor applications
• Laboratory facilities
• Process data acquisition and monitoring
• Optional: stainless steel housing
Your benefits
• Loop-powered indicator in single compartment housing
• 5-digit LC display, character height 20.5 mm (0.8")
• Illuminated display, rotatable in 90° steps
• Trend bargraph in increments of 10%
• Measuring range display from -19999 to 99999
• Digital limit switch
• Freely programmable units
• 3-key operation
• Approvals: ATEX, IECEx, FM, CSA, TIIS, UL listed,
GL marine certificate
•3 cable entries
• Configuration with FieldCare PC software
• Configuration without power supply using setup box
RIA14
2 Endress+Hauser
Function and system design
Measuring principle
a0011145-en
Example of an application of the field indicator
The indicator records an analog measuring signal and shows this on the display. The LC display shows
the current measured value digitally and as a bargraph with limit value violation signalling. The
indicator is looped into the 4 to 20 mA circuit and obtains the required energy from there.
Measuring system Microcontroller controlled indicator in single chamber field housing with illuminated LC display. The
measuring range, decimal point and offset of the indicator can be configured comfortably by means of
three keys in the device with the housing open or by means of a PC with the FieldCare PC software.
Input
Measured variable Current
Measuring range 4 to 20 mA (reverse polarity protection)
Output
Output signal Digital limit switch
Passive, open collector:
I
max
= 200 mA
U
max
= 35 V
U
low/max
= < 2 V at 200 mA
Max. reaction time to limit value = 250 ms
Temperature range: -20 to +80 °C (-4 to +176 °F)
Signal on alarm • No measured value visible on the LC display, no background illumination.
• Open Collector inactive.
Transmission behavior The indicator allows the HART
®
transmission protocol to pass unimpeded.
RIA14
Endress+Hauser 3
Power supply
Terminal assignment
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Terminal assignment of the field indicator
Supply voltage Supply by means of the 4 to 20 mA current loop.
Voltage drop • Line voltage drop < 3.6 V at 3 - 22 mA
• Max. line voltage drop < 6 V at max. short-circuit current 200 mA
Terminals Cables / wires up to max. 2.5 mm
2
(14 AWG) plus ferrule
Cable entry The following cable entries are available:
•Thread NPT1/2
•Thread M20
•Thread G1/2
• 2x gland NPT1/2 + 1x blind plug
• 2x gland M20 + 1x blind plug
Terminal Terminal assignment Input and output
+ Measuring signal (+) 4 to 20 mA Signal input
- Measuring signal (-) 4 to 20 mA Signal input
1 Terminal for further instrumentation Support terminal
2 Digital limit switch (collector) Switch output
3 Digital limit switch (emitter) Switch output
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