2231
Trip amplifier
- AC/DC trip amplifier
- 2 adjustable alarm limits
- Galvanically isolated 3.75 kVAC
- Front-programmable
- 3-digit LED display
- 24 VDC or universal supply
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.
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 A |
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 |
