Trip Amplifier – PR Electronics 2231

Features

  • AC/DC trip amplifier
  • 2 adjustable alarm limits
  • Galvanically isolated 3.75 kVAC
  • Front-programmable
  • 3-digit LED display
  • 24 VDC or universal supply
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Advanced features

  • The front-operated push buttons are used for programming the different standard functions.
  • A password can prevent access for changing parameters.

Application

  • Alarm detector in connection with measurement of AC/DC current or voltage signals.
  • The unit is used where accurate setpoint setting and different alarm functions are required.
  • The unit can be used as a single or dual trip amplifier.
  • Used in applications where programmable parameters such as hysteresis, setpoint, reset, active relay for increasing or decreasing signal, delay and input signal need to be set.

Technical characteristics

  • 3-digit display showing the input signal in %.
  • Two LED indicating relay status.
  • 3 pushbuttons for programming.
  • Standard DC current input signals in the range 0…20 mA.
  • DC voltage signals in the range 0…250 VDC.
  • AC current signals up to 1 A.
  • True RMS measurement of AC voltage signals in the range 0…250 VAC.
  • Mounting for a standard 11-pole socket which can be adapted for DIN rail or plate use with PR’s 7023 adaptor and 7024 mounting keying.

Specification

ENVIRONMENTAL CONDITIONS
Operating temperature -20°C to +60°C
Calibration temperature 20…28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP50
MECHANICAL SPECIFICATIONS
Dimensions (HxWxD) 80.5 x 35.5 x 84.5 mm (D is without pins)
Weight DC / universally supplied 125 g / 175 g
COMMON SPECIFICATIONS
Supply
Supply voltage 19.2…28.8 VDC
Supply voltage, universal 21.6…253 VAC, 50…60 Hz or 19.2…300 VDC
Internal power dissipation 1.5 W (2231D) 2 W (2231P)
Isolation voltage
Isolation voltage, test / working 3.75 kVAC / 250 VAC
PELV/SELV IEC 61140
Response time
Response time (programmable) 0.25…60 s (DC) 0.75…60 s (AC)
Updating time 100 ms
Accuracy Better than 0.1% of sel. range
Signal dynamics, input 16 bit
Effect of supply voltage change < ±0.002% of span / %V
Temperature coefficient < ±0.01% of span /°C (DC signals) < ±0.02% of span /°C (AC signals)
Linearity error < 0.1% of span < ±0.35% of span 50…1000 Hz (AC sine wave signals)
EMC immunity influence < ±0.5%
INPUT SPECIFICATIONS
Common input specifications
Max. offset 50% of selected max. value
Current input
Measurement range 0…20 mA
Min. measurement range (span) 10 mA
Input resistance 50 Ω
AC current input
Measurement range 0…1 ARMS
Min. measurement range (span) 0.5 ARMS
Input resistance 1 Ω / 2 W
Voltage input
Measurement range 0…250 VDC
Min. measurement range (span) 0.5 VDC
Input resistance Nom. 5 MΩ
AC voltage input
AC voltage input 0…250 VRMS
Min. measurement range (span) 0.5 VRMS
Input resistance Nom. 5 MΩ
OUTPUT SPECIFICATIONS
Relay output
Hysteresis 0…99.9% of span
ON and OFF delay 0.0…99.9 s
Max. voltage 250 VRMS
Max. current 2 AAC
Max. AC power 500 VA
Max. load at 24 VDC 1:00 AM
COMMON OUTPUT SPECIFICATIONS
Updating time 100 ms
Relay outputs: Setpoint setting 0…99.9% of span
of span = of the presently selected range
OBSERVED AUTHORITY REQUIREMENTS
EMC 2014/30/EU
LVD 2014/35/EU
EAC TR-CU 020/2011

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