ALSTOM EP3-E-4-A

Product Name: ALSTOM EP3-E-4-A Enhanced Protection Analog I/O Module (for DEH / Turbine Control)

Product Brief: A high-reliability analog input/output module belonging to Alstom’s (now GE Power) P320/P325 or Mark VIe distributed turbine control architecture. Used for acquiring analog field signals (temperature, pressure, position) or generating 4–20 mA analog outputs for valve positioning in steam/gas turbine DEH systems.

Category: ALSTOM

Description

Technical Specifications:

Type: 4 or 8-channel Analog Input (AI) or Analog Output (AO) — configurable per slot (common variant: 4 AI / 4 AO mixed or 8 AO for T3000)
Input Signal Types: 4–20 mA, 0–10 V, ±10 V, thermocouple (software-configurable per channel)
Resolution: 16-bit A/D or D/A conversion
Accuracy: ±0.1 % of full scale
Backplane Communication: High-speed parallel bus compatible with Alstom Mark VIe / T3000 rack
Isolation: Channel-to-channel and channel-to-backplane galvanic isolation
Power Supply: Derived from backplane (+5 VDC, ±15 VDC)
Operating Temp: 0 to +60 °C (some variants –20 to +70 °C)
Diagnostics: Per-channel open-wire / short detection, module status LEDs
Hot-Swap: Supported — module replaceable without system shutdown

Features:

Adaptive PID and valve-characterization support via host processor
Redundant operation capability in critical control loops
Compatible with Alstom GT13E2, GT24/26 gas turbines and large steam turbines

Application: Gas/steam turbine DEH — exhaust temp monitoring, bearing oil pressure, fuel valve position feedback, governor reference output to electro-hydraulic servo valves.

Installation: Vertical insertion into designated I/O pack slot of Alstom turbine control cabinet. Secure with retaining screw; verify backplane seating. Configure channels via ToolboxST or T3000 engineering software.

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