1. General Specifications
Parameter Specification
Model UES 815S
Type Digital Speed Monitoring System
Application Overspeed/Underspeed protection for turbines, compressors, etc.
Standards API 670, SIL 2 (optional)
Certifications ATEX/IECEx (optional), CE, UL
2. Speed Measurement
Feature Details
Input Signal Magnetic pickup (MPU) or proximity probe
Speed Range 1–30,000 RPM (configurable)
Accuracy ±0.1% of reading (±1 RPM below 100 RPM)
Resolution 0.1 RPM (digital display)
Pulses/Revolution 1–60 (programmable)
3. Alarm & Protection
Parameter Value
Setpoints 2 independent (Overspeed/Underspeed)
Adjustment Range 0–120% of rated speed
Relay Outputs 3 SPDT (250VAC/5A, failsafe configurable)
Trip Delay 0.1–10 sec (adjustable)
4. Electrical Specifications
Characteristic Specification
Power Supply 24 VDC (±10%) or 85–264 VAC (50/60 Hz)
Consumption ≤15 W
Analog Output 4–20 mA (scalable to speed)
Communication RS-485 (Modbus RTU)
5. Environmental Ratings
Condition Rating
Operating Temp. -30°C to +70°C
Humidity 5–95% RH (non-condensing)
Enclosure IP65 (front panel), IP20 (terminal area)
Housing Aluminum alloy (powder-coated)
6. Display & Interface
Feature Details
Display 5-digit LED (0.5" height)
Indicators LED status (Power, Alarm, Bypass)
Programming Front-panel pushbuttons with password protection
7. Mechanical Specifications
Attribute Value
Dimensions 96 × 96 × 150 mm (H×W×D)
Mounting Panel cutout (92×92 mm)
Weight ≈1.2 kg
8. Typical Applications
Steam/Gas turbine overspeed protection

Compressor train speed monitoring

Critical pump/motor speed control

Integration with ESD (Emergency Shutdown) systems

9. Ordering Options
UES 815S-B: Basic version

UES 815S-EX: ATEX/IECEx certified

UES 815S-SIL: SIL 2 compliant