Endress+Hauser RIA452 Specifications

TI00113R/09/EN/13.16 71349725

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RIA452

Panel meter

Digital process meter in panel mounted housing for monitoring and displaying analog measured values with pump control and batch functions

Application

• Water/wastewater sector

• Power industry

• Raw materials

• Chemicals industry

• Food industry

Your benefits

• 7-digit 14-segment LC display

• Multicolored

• Large bar graph with overrange and underrange

• Intrinsically safe input with transmitter power supply

• Digital status inputs for pump monitoring

• Universal input

• Up to eight relays

• Min/Max value saved

• Pump control functions

• Batch functions

• Flow measurement for open channels and weirs

• Linearization table with 32 support points

• Analog output

• Pulse output with totalizer

• Jog-shuttle operation

• Freely programmable units

• Configuration via interface and operating software

• Tank linearization via PC software

Measuring principle

RIA452

Function and system design

Measuring system

A0028466

 1 Example of an application of the process display unit

The single-channel process meter RIA452 monitors and displays analog measured values. Pumps can be monitored with the digital status inputs. The measured value is displayed using the sevendigit 14-segment LC display. Numbers and units are displayed in white, the bar graph in yellow, overrange and underrange in red and the limit value flags and digital status inputs in green and yellow. The RIA452 can provide power directly to two-wire transmitters connected. You have the option of selecting the input and the transmitter power supply as intrinsically safe for Ex applications. Up to eight freely programmable relays monitor the measured value for limit value overshoot and undershoot. Other operating modes for the relays include sensor or device malfunction, batch and pump control functions (e.g. alternating pump control). Furthermore, the RIA452 can be used as a preset counter and for measuring flow at open channels and measuring weirs.

The scalable analog output offers many different ways of forwarding the input signal: zoom function, linearization, offset, inversion and signal conversion (input/output conversion). The optional pulse output gives the user the option of outputting integrated process values.

Microcontroller controlled meter in panel mounted housing with multicolored, illuminated LC display. The analog measured value acquisition takes place via an analog/digital converter. The digital status inputs are scanned cyclically. Power can be supplied directly to two-wire sensors with the transmitter power supply integrated as standard. The current input is optionally available as an intrinsically safe version for Ex applications. Here, the RIA452 has a second, intrinsically safe transmitter power supply.

The freely scalable analog output is output via a digital/analog conversion. The digital pulse output is output directly.

Up to eight relays are available in the device for monitoring limit values, pump control and batch functions.

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RIA452

The device can be operated on site, using the jog/shuttle dial or via the PC with an operating software. Operation can be locked using the hardware key or software code.

Linearization

The following flow curves are stored for open channels and weirs:

• Khafagi-Vernturi channel

• ISO-Venturi channel

• BST

-Venturi channel

• Parshall channel

• Palmer-Bowlus channel

• Rectangular weir

• Rectangular weir with constriction

• NFX

rectangular weir

rectangular weir with constriction

• Trapezoidal weir

• Triangular ("V") weir

• BST

• NFX

triangular weir

Flow formula can be freely configured

Q = C * (hα + γ*hβ)

The parameters α, β, γ and C can be entered freely.

Linearization function

Up to 32 freely definable support points are available in the device to linearize the input, e.g. for tank linearization.

The linearization table for standard tanks and customer-specific tanks can be generated with the ReadWin 2000 operating software.

Input

Measured variable

Measuring range Current input:

• Current (standard)

• Digital inputs (standard)

• Current/voltage, resistance, resistance thermometer, thermocouples (universal input option)

• 0/4 to 20 mA +10% overrange, 0 to 5 mA

• Short-circuit current: max. 150 mA

• Input impedance: ≤ 5 Ω

• Reaction time: ≤ 100 ms

Universal input:

Current::

• 0/4 to 20 mA + 10% overrange, 0 to 5 mA

• Short-circuit current: max. 100 mA

• Input impedance: ≤ 50 Ω Voltage:

• ±150 mV, ±1 V, ±10 V, ±30 V, 0 to 100 mV, 0 to 200 mV, 0 to 1 V, 0 to 10 V

• Input impedance: ≥ 100 kΩ Resistance:

30 to 3 000 Ω in 3/4-wire technology Resistance thermometer:

• Pt100/500/1000, Cu50/100, Pt50 in 3/4-wire technology

• Measuring current for Pt100/500/1000 = 0.25 mA

1) BST: British Standard

2) NFX: French Standard NFX 10-311

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Thermocouple types:

• J, K, T, N, B, S, R as per IEC584

• D, C as per ASTME998

• U, L as per DIN43710/GOST

• Reaction time: ≤ 100 ms

Digital input:

• Voltage level –3 to 5 V low, 12 to 30 V high (as per DIN19240)

• Input voltage max. 34.5 V

• Input current typ. 3 mA with overload and reverse polarity protection

• Sampling frequency max. 10 Hz

RIA452

Galvanic isolation

Output signal

Signal on alarm

Current/voltage output

Pulse output (open collector)

Towards all other circuits

Output

• Relay, transmitter power supply (standard)

• Current, voltage, pulse, intrinsically safe transmitter power supply (option)

No measured value visible on the LC display, no background illumination, no sensor power supply, no output signals, relays behave in safety-oriented manner.

Span: 0/4 to 20 mA (active), 0 to 10 V (active)

Load:

• ≤ 600 Ω (current output)

• Max. loop current 22 mA (voltage output) Signal characterization:

Signal freely scalable Galvanic isolation towards all other circuits

• Frequency range to 2 kHz

• I

= 200 mA

max

• U

= 28 V

max

• U

• Pulse width = 0.04 to 2 000 ms

= 2 V at 200 mA

low/max

Relay

Signal characterization: Binary, switches when the limit value is reached

Switch function: limit relay switches for the operating modes:

• Minimum/maximum safety

• Alternating pump control function

• Batch function

• Time control

• Window function

• Gradient

• Device malfunction

• Sensor malfunction Switching threshold:

Freely programmable Hysteresis:

0 to 99% Signal source:

• Analog input signal

• Integrated value

• Digital input

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RIA452

Number: 4 in basic unit (can be extended to 8 relays, option)

Electrical specifications:

• Relay type: changeover

• Relay switching capacity: 250 VAC / 30 VDC, 3 A

• Switch cycles: typically 10

• Switching frequency: max. 5 Hz

• Minimum switching load: 10 mA / 5 V Galvanic isolation towards all other circuits

Mixed assignment of low and extra-low voltage circuits is not permitted for neighboring relays.

Transmitter power supply Transmitter power supply 1, terminal 81/82 (optionally intrinsically safe):

Electrical specifications:

• Output voltage: 24 V ±15%

• Output current: max. 22 mA (at U

• Impedance: ≤ 345 Ω Approvals:

• ATEX

• FM

• CSA

≥ 16 V, sustained short-circuit proof)

out

Transmitter power supply 2, terminal 91/92:

Electrical specifications:

• Output voltage: 24 V ±15%

• Output current: max. 250 mA (sustained short-circuit proof)

Transmitter power supply unit 1 and 2:

Galvanic isolation: Towards all other circuits

HART®

No HART® signal influence

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