Product Description
PR4131 is a universal trip amplifier of PR‑Electronics 4000 series for DIN‑rail mounting. It accepts universal input types: RTD, thermocouple TC, ohm, potentiometer, mA and voltage signals. Two configurable potential‑free relay outputs support high‑low limit alarm, window alarm and relay latch‑up function with manual reset. Advanced sensor fault surveillance is integrated. 3‑port galvanic isolation rated 2.3 kVAC is implemented. Universal wide‑range AC/DC power supply. Parameters, calibration and simulation are configured via external detachable PR‑4501 / 4511 display/programming front unit; no DIP‑switch access required. Front‑panel LEDs indicate operation status, faults and relay activity. FM approved for Div.2 hazardous‑area installation, widely used for process‑alarm and interlock protection.
Technical Parameters
| Item | Specifications |
|---|---|
| Product family | 4000 Series |
| Model | PR4131 |
| Type | Universal Trip Amplifier / Alarm Threshold Relay Module |
| Mounting | DIN‑rail |
| Input types | RTD, Thermocouple TC, resistance, potentiometer, 0‑20 mA, voltage |
| Output | 2 × potential‑free relay contacts |
| Relay contact rating | 250 VAC, 3 A |
| Alarm functions | High / low limit, window alarm, relay latch (manual reset) |
| Diagnostics | Sensor wire‑break / short‑circuit detection, internal self‑diagnosis |
| Galvanic isolation | 3‑port, 2.3 kVAC |
| Power supply | 21.6‑253 VAC 50‑60 Hz; 19.2‑300 VDC universal supply |
| Accuracy | Better than 0.1 % of selected range |
| Configuration | External 4501 / 4511 detachable display‑programming front |
| Status indication | Green LED for run/fault; yellow LED for relay activation |
| Hazardous‑area approval | FM for Div.2 installation |
| Operating temperature | ‑20 ℃ ~ +60 ℃ |
| Storage temperature | ‑40 ℃ ~ +85 ℃ |
| Protection class | IP20 (cabinet installation) |
| Humidity | 5‑95 % RH, non‑condensing |
| Weight | Approx. 120 g |
Product Application
- Chemical process: temperature, pressure, level over‑limit alarm and interlock trigger
- Oil & gas: field‑sensor threshold alarming, safety‑signal interlock
- Water‑treatment: temperature & flow monitoring, over‑limit alarm output
- Power & energy: process‑parameter violation protection, relay‑based interlock loops
- Pharmaceutical machinery: process‑temperature monitoring & alarming
- Factory automation: sensor‑fault detection and equipment‑protection alarm
- Pre‑processing of field signals for DCS / PLC systems with isolation and alarm functions
Related 4000‑series Models
PR4114 Universal Transmitter PR4116 Universal Isolating Transmitter PR4131 Universal Trip Amplifier PR4222 Dual‑channel Signal Converter PR4501 Detachable Display‑Programming Front PR4511 Detachable Display‑Programming Front
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