PR Electronics 4131 – Universal Trip Amplifier

Features

  • Input for RTD, TC, Ohm, potentiometer, mA and V
  • 2 adjustable alarm limits
  • FM-approved for installation in Div. 2
  • 2 relay outputs
  • Universal AC or DC supply
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PR Electronics 4131 – Universal Trip Amplifier

Advanced features

  • Programmable using a detachable display front (4501), allowing for process calibration, relay simulation, password protection, error diagnostics, and selection of help text in multiple languages.

Application:

  • Ideal for process control, equipped with 2 pairs of potential-free relay contacts that can be customized for various applications.
  • Functions as a trip amplifier with a window feature defined by high and low setpoints, with relay state changes occurring outside the defined window.
  • Includes a relay latch function where activation requires manual reset.
  • Features sophisticated sensor error monitoring: one relay holds the previous state during sensor errors while allowing the process to continue; the other relay can be set for sensor error alarms to prompt immediate sensor replacement.

Technical Characteristics:

  • When paired with PR Electronics 4501 display/programming front, PR Electronics 4131 allows modification of all operational parameters for specific applications, utilizing electronic hardware switches instead of DIP-switches for settings.
  • Front LEDs indicate normal operation (green), malfunction (green), and relay activity (yellow).
  • Ensures continuous verification of vital stored data for safety.
  • Provides 3-port 2.3 kVAC galvanic isolation for enhanced reliability.

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 104 mm
Dimensions (HxWxD) w/ 4501/451x 109 x 23.5 x 116 / 131 mm
Weight approx. 170 g
Weight incl. 4501 / 451x (approx.) 185 g / 200 g
Wire size 0.13…2.08 mm2 AWG 26…14 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 ≤ 2.0 W
Max. power dissipation ≤ 2.0 W
Isolation voltage
Isolation voltage, test / working 2.3 kVAC / 250 VAC
Response time
Temperature input (0…90%, 100…10%) ≤ 1 s
mA / V input (0…90%, 100…10%) ≤ 400 ms
Auxiliary supplies
2-w. supply (term. 44…43) 25…16 VDC / 0…20 mA
Programming PR 45xx
Signal / noise ratio Min. 60 dB (0…100 kHz)
Accuracy Better than 0.1% of sel. range
EMC immunity influence < ±0.5% of span
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1% of span
INPUT SPECIFICATIONS
RTD input
RTD type Pt10/20/50/100/200/250; Pt300/400/500/1000; Ni50/100/120/1000; Cu10/20/50/100
Cable resistance per wire 50 Ω (max.)
Sensor current Nom. 0.2 mA
Effect of sensor cable resistance (3-/4-wire) < 0.002 Ω / Ω
Sensor error detection Yes
Short circuit detection < 15 Ω
Linear resistance input
Linear resistance min….max. 0 Ω…10000 Ω
Potentiometer input
Potentiometer min….max. 10 Ω…100 kΩ
TC input
Thermocouple type B, E, J, K, L, N, R, S, T, U, W3, W5, LR
Cold junction compensation (CJC) via ext. sensor in 5910 20…28°C ≤ ±1°C, -20…20°C / 28…70°C ≤ 2°C
CJC via int. mounted sensor ±(2.0°C + 0.4°C * Δt)
Δt = Internal temp.-ambient temp.
Sensor error detection Yes
Sensor error current: When detecting / else Nom. 2 μA / 0 μA
Current input
Measurement range 0…23 mA
Programmable measurement ranges 0…20 and 4…20 mA
Input resistance Nom. 20 Ω + PTC 50 Ω
Voltage input
Measurement range 0…12 VDC
Programmable measurement ranges 0/0.2…1, 0/1…5, 0/2…10 VDC
Input resistance Nom. 10 MΩ
OUTPUT SPECIFICATIONS
Relay output
Relay functions Setpoint, Window, Sensor error, Latch, Power and Off
Hysteresis 0…100%
ON and OFF delay 0…3600 s
Max. voltage 250 VRMS
Max. current 2 AAC or 1 ADC
Max. AC power 500 VA
Sensor error reaction Break / Make / Hold
of span = of the currently selected measurement range
OBSERVED AUTHORITY REQUIREMENTS
EMC 2014/30/EU
LVD 2014/35/EU
RoHS 2011/65/EU
EAC TR-CU 020/2011
EAC LVD TR-CU 004/2011
APPROVALS
c UL us, UL 508 / C22.2 No. 14 E231911
FM 3025177
DNV-GL Marine TAA0000101
EU RO Mutual Recognition Type Approval MRA000000Z

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