Functionality
The 505E’s control capabilities are:
Speed/Frequency Control
Extraction / Admission Header Pressure Control
Turbine or Generator Load Control or Limiting
Turbine Inlet Header Pressure Control or Limiting
Turbine Exhaust Header Pressure Control or Limiting
Plant Import/Export Power Control or Limiting
Isochronous Load Sharing between units (with DSLC™
control)
Features
Critical Speed Avoidance (3 speed bands)
Auto Start Sequence (hot & cold starts)
Valve Limiter(s)
Security (Program is Password Protected)
Dual Speed/Load Dynamics
First-Out Indication (Shutdowns)
Zero Speed Detection with proximity probe (< 0.5 Hz)
Peak Speed Indication for overspeed trip
Two Programmable Functions Keys on the 505E’s front
panel
Two independent Modbus comm links
Remote analog setpoints for Speed/Load, Ext/Adm, Aux,
and Cascade
Program upload/download capability
Feed-forward decoupling algorithm for compressors
Operating Conditions
–25 to +65 °C ambient air temperature range
Optional NEMA type 4 (watertight and dust-tight, indoor/outdoor) enclosure for bulkhead mounting with a temperature range
from –25 to +55 °C
Approximate dimensions 14L x 11H x 4D inches (356 x 279 x 102 mm)
Approximate bulkhead enclosure dimensions 20L x 20H x 7.6D inches (508 x 508 x 193 mm)
Humidity: Lloyd’s ENV2 test #1
Dry heat: Lloyd’s ENV3
Salt fog: US MIL-STD-810 method 509.2 procedure 1
Shock: meets US MIL-STD-810C, method 516.2-1. procedure 1B
Vibration: Lloyd’s ENV2 test #1
Certifications: CE (18–32 Vdc version only), UL, & cUL

Pollution Resistance
Particulate Pollution Resistance: IEC 664-1 Pollution Degree 2 (Normally only nonconductive pollution occurs. Temporary
conductivity caused by condensation is to be expected.)
Gaseous Pollution Resistance: The polyacrylate conformal coating withstands NO2. CO2. SO2. and H2S gases per IEC
60068-2-60:1995 Part 2.60 Methods 1 and 4 (Flowing Mixed Gas Corrosion Test). It will withstand levels typical of
telecommunications and computer installations as defined by Battelle Labs Class III (between IEC 60721-3-3 classification
3C1 and 3C2. light industrial to urban industrial, heavy traffic).