Signal Calculator – PR Electronics 5115A

Features

  • Redundancy measurement with 2 input signals
  • Signal calculator with the four arithmetical operations
  • Duplication of the input signal
  • Input for RTD, Ohm, TC, mV, mA, and V
  • Universal supply by AC or DC
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Application

  • Redundancy measurement of temperature by means of two sensors, where the secondary sensor takes over the measurement when a sensor error occurs on the primary sensor.
  • Duplication of the input signal, e.g. from a temperature sensor or an analog process signal to two separate analog outputs.
  • Signal calculator with four arithmetical operations: Addition, subtraction, multiplication and division.
  • Example: Differential measurement:
    (Input 1 * K1) – (Input 2 * K2) + K4
  • Example: Average measurement:
    (Input 1 * 0.5) + (Input 2 * 0.5) + K4
  • Example: Different functions on the outputs:
    Output 1 = input 1 – input 2, and Output 2 = input 1 + input 2
  • Power supply for 2-wire transmitters.

Technical characteristics

  • Within a few seconds the user can program PR5115A to a selected application using the configuration program PReset.
  • A green front LED indicates normal operation, sensor error on each sensor, and functional error.
  • Continuous check of vital stored data for safety reasons.
  • 5-port 3.75 kVAC galvanic isolation.

Mounting / installation

  • Mounted vertically or horizontally on a DIN rail. As the devices can be mounted without any distance between neighboring units, up to 42 devices can be mounted per meter.

Specification

ENVIRONMENTAL CONDITIONS
Operating temperature -20°C to +60°C
Calibration temperature 20…28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP20
MECHANICAL SPECIFICATIONS
Dimensions (HxWxD) 109 x 23.5 x 130 mm
Weight approx. 225 g
Wire size 1 x 2.5 mm2 stranded wire
Screw terminal torque 0.5 Nm
Vibration IEC 60068-2-6
2…13.2 Hz ±1 mm
13.2…100 Hz ±0.7 g
COMMON SPECIFICATIONS
Supply
Supply voltage, universal 21.6…253 VAC, 50…60 Hz or 19.2…300 VDC
Fuse 400 mA SB / 250 VAC
Max. required power ≤ 3 W
Isolation voltage
Isolation voltage, test / working 3.75 kVAC / 250 VAC
PELV/SELV IEC 61140
Response time
Temperature input, programmable (0…90%, 100…10%) 400 ms…60 s
mA / V input (programmable) 250 ms…60 s
Programming Loop Link
Signal / noise ratio Min. 60 dB (0…100 kHz)
Redundancy switch-over time ≤ 400 ms
Accuracy Better than 0.05% of selected range
Signal dynamics, input 22 bit
Signal dynamics, output 16 bit
Auxiliary voltages: Reference voltage 2.5 VDC ±0.5% / 15 mA
EMC immunity influence < ±0.5% of span
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1% of span
INPUT SPECIFICATIONS
Common input specifications
Max. offset 50% of selected max. value
RTD input
RTD type Pt100, Ni100, lin. R
Cable resistance per wire 10 Ω (max.)
Sensor current Nom. 0.2 mA
Effect of sensor cable resistance (3-/4-wire) < 0.002 Ω / Ω
Sensor error detection Yes
TC input
Thermocouple type B, E, J, K, L, N, R, S, T, U, W3, W5, LR
Cold junction compensation (CJC) < ±1.0°C
Sensor error current Nom. 30 μA
Current input
Measurement range 0…100 mA
Min. measurement range (span) 4 mA
Input resistance: Supplied unit Nom. 10 Ω + PTC 10 Ω
Input resistance: Non-supplied unit RSHUNT = ∞, VDROP < 6 V
Voltage input
Measurement range 0…250 VDC
Min. measurement range (span) 5 mV
Input resistance Nom. 10 MΩ (≤ 2.5 VDC) Nom. 5 MΩ (> 2.5 VDC)
mV input
Measurement range -150…+150 mV
OUTPUT SPECIFICATIONS
Current output
Signal range 0…20 mA
Min. signal range 10 mA
Load (@ current output) ≤ 600 Ω
Load stability ≤ 0.01% of span / 100 Ω
Current limit ≤ 28 mA
Sensor error indication Programmable 0…23 mA
NAMUR NE43 Upscale/Downscale 23 mA / 3.5 mA
Voltage output
Signal range 0…10 VDC
Min. signal range 500 mV
Load (@ voltage output) ≥ 500 kΩ
Passive 2-wire mA output
Signal range 4…20 mA
Load stability ≤ 0.01% of span / 100 Ω
Effect of external 2-wire supply voltage variation < 0.005% of span / V
Max. external 2-wire supply 29 VDC
of span = of the presently selected range
OBSERVED AUTHORITY REQUIREMENTS
EMC 2014/30/EU
LVD 2014/35/EU
EAC TR-CU 020/2011
APPROVALS
DNV-GL Marine Stand. f. Certific. No. 2.4

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