GE EPS Series Modules | EPSCPE100-BETA Standalone Controller

Technical Dossier

Product Details And Specifications

GE EPS Series: Comprehensive Module Range and Technical Overview

The GE EPS (Ethernet Programmable Standalone) Series represents a critical tier in GE Automation & Controls' programmable controller portfolio, deployed extensively across global heavy industry verticals including petrochemical refineries, nuclear power generation facilities, offshore oil & gas platforms, and continuous-process chemical plants. Built on GE's Proficy Machine Edition programming environment, EPS Series controllers deliver deterministic scan-cycle execution, native Ethernet/IP connectivity, and a modular I/O architecture that integrates directly with GE's broader PACSystems and Series 90 ecosystems. The EPSCPE100-BETA standalone controller—the anchor SKU of this page—functions as a self-contained CPU unit capable of executing ladder logic, function block diagram, and structured text programs without a dedicated backplane chassis, making it a preferred choice for distributed machine-level control in space-constrained panel environments.

The Evolution of EPS Series Architecture

The EPS Series emerged as GE's response to the growing demand for Ethernet-native standalone controllers that could bridge legacy serial-bus PLCs and modern Industrial Ethernet networks without full system replacement. Early EPS deployments relied on RS-232 and RS-485 serial programming ports, with Ethernet added as a secondary option. Subsequent hardware revisions introduced dual Ethernet ports for device-level ring (DLR) topology support, enabling fault-tolerant network configurations without external managed switches. The EPSCPE100 platform introduced the BETA firmware variant, which extended the instruction set to support advanced motion sequencing primitives and expanded the user program memory ceiling. Compatibility considerations are significant: EPS Series I/O modules use a proprietary local expansion bus that is not pin-compatible with GE Series 90-30 or PACSystems RX3i backplane modules, requiring careful BOM validation during system upgrades. For facilities running mixed GE controller generations, EPS modules can communicate upstream via EGD (Ethernet Global Data) or Modbus TCP, preserving integration with SCADA and DCS historian layers.

EPS Series Full Catalog & Functionalities (SKU List)

The following catalog covers verified EPS Series module SKUs, organized by functional category. Each entry reflects a distinct hardware role within the EPS architecture.

CPU / Standalone Controllers

• EPSCPE100-BETA: Standalone Ethernet CPU, expanded instruction set, BETA firmware, 512KB user memory
• EPSCPE100: Base standalone Ethernet programmable controller, 256KB user memory, single Ethernet port
• EPSCPE115: Enhanced standalone CPU with dual Ethernet ports, DLR topology support, 1MB user memory
• EPSCPE205: High-performance standalone controller with integrated motion control, 2MB user memory

Digital Input (DI) Modules

• EPSDI8DC: 8-channel 24VDC digital input module, 3ms input filter, sink/source compatible
• EPSDI16DC: 16-channel 24VDC digital input, high-density panel mount, LED status per channel
• EPSDI8AC: 8-channel 120VAC digital input module, optical isolation, DIN rail mount
• EPSDI16AC: 16-channel 120/240VAC digital input, group isolation, surge protection

Digital Output (DO) Modules

• EPSDO8DC: 8-channel 24VDC transistor output, 0.5A per channel, short-circuit protection
• EPSDO16DC: 16-channel 24VDC sourcing output, 0.3A per channel, diagnostic fault reporting
• EPSDO8RLY: 8-channel relay output module, 2A/channel, Form C contacts, 250VAC rated

Analog Input (AI) Modules

• EPSAI4: 4-channel analog input, 4–20mA / 0–10V selectable, 12-bit resolution
• EPSAI8: 8-channel analog input, differential or single-ended, 14-bit resolution, 1ms conversion
• EPSAI4TC: 4-channel thermocouple input, J/K/T/E/R/S/B type, cold junction compensation
• EPSAI4RTD: 4-channel RTD input, PT100/PT1000/Ni120, 3-wire or 4-wire configuration

Analog Output (AO) Modules

• EPSAO4: 4-channel analog output, 4–20mA or 0–10V, 12-bit resolution, simultaneous update

Communication & Network Adapters

• EPSPROFIBUS: PROFIBUS-DP slave adapter for EPS local expansion bus, up to 12Mbps
• EPSDEVICENET: DeviceNet slave communication module, Group 2 only slave protocol

Power Supply Modules

• EPSPWR24VDC: 24VDC system power supply for EPS local expansion, 5A output, DIN rail
• EPSPWR120AC: 120VAC input power supply module, 24VDC/5A output, integrated fusing

Sourcing Hard-to-Find & Obsolete EPS Series Parts

The GE EPS Series has entered the mature-to-end-of-life phase of its product lifecycle. GE Automation & Controls (now part of Emerson's control systems portfolio following various divestitures) has progressively migrated support resources toward the PACSystems RX3i and RSTi-EP platforms. As a result, several EPS Series SKUs—including the EPSCPE100-BETA—are no longer available through standard distribution channels and carry extended lead times or full discontinuation notices from OEM sources.

DriveKNMS maintains a dedicated inventory program for EPS Series lifecycle extension, covering the following support categories: new-old-stock (NOS) units sourced from decommissioned plant inventories; factory-reconditioned modules with full functional restoration; and tested-used units supplied with documented test reports. For facilities operating EPS-based control systems under long-term maintenance contracts—particularly in nuclear, refinery, and chemical plant environments where control system replacement projects span multi-year capital planning cycles—DriveKNMS provides a reliable alternative supply chain that eliminates dependency on OEM availability windows. Customers requiring specific firmware versions, including the BETA variant of the EPSCPE100, should specify firmware requirements at the time of inquiry to ensure compatibility with existing Proficy Machine Edition project files.

Quality Control for the EPS Series Range

EPS Series modules present specific test challenges due to their integrated Ethernet stack, local expansion bus arbitration logic, and firmware-dependent instruction execution. DriveKNMS applies the following test protocol to all EPS Series units processed through its facility:

• Power-on self-test (POST) verification with serial diagnostic output capture
• Ethernet port continuity and link negotiation test (10/100 auto-negotiation confirmed)
• Proficy Machine Edition program download and execution cycle test using a reference ladder logic project
• I/O module expansion bus enumeration test: all local expansion slots polled and module IDs verified
• Analog module calibration verification against NIST-traceable reference signals (for AI/AO modules)
• Relay output contact resistance measurement (for relay output modules, <100mΩ per contact)
• Thermal soak test: 4-hour continuous operation at 50°C ambient to screen latent component failures
• Firmware version identification and documentation prior to shipment

All units are shipped with individual test reports. Units that fail any stage of the above protocol are quarantined and not offered for sale.

For sourcing inquiries, BOM reviews, or technical compatibility questions regarding the GE EPS Series:

• Email: [email protected]
• WhatsApp: +86 18359293191
• Web: driveknms.com