GE IC695ETM001-EM Ethernet Communication Module – PACSystems RX3i

GE IC695ETM001-EM: Backplane-Native Ethernet Gateway for PACSystems RX3i Distributed Control

The IC695ETM001-EM is a dedicated Ethernet communications module engineered for the GE PACSystems RX3i (IC695) control platform. Its primary function within a control loop is to serve as the deterministic network interface between the RX3i CPU and plant-level Ethernet infrastructure — bridging the backplane’s high-speed parallel bus to IEEE 802.3 Ethernet without introducing latency penalties that would compromise scan-cycle integrity. Unlike software-based communication stacks running on a shared CPU, the IC695ETM001-EM offloads all protocol processing to its own onboard processor, preserving CPU scan time for control logic execution.

The module supports three concurrent protocol stacks: SRTP (Service Request Transport Protocol) for native GE controller-to-controller and SCADA communication, Modbus TCP for third-party device interoperability, and EGD (Ethernet Global Data) for high-speed peer-to-peer data exchange between PACSystems nodes. This multi-protocol architecture eliminates the need for external protocol converters or gateway PLCs in mixed-vendor environments, reducing both hardware cost and network latency.

📩 Real-time Stock & RFQ: [email protected]  |  WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The IC695ETM001-EM is built around a dedicated communications processor that operates independently of the RX3i CPU’s main scan cycle. This architectural separation is the module’s most significant design advantage: the CPU’s ladder logic or function block execution is never stalled waiting for Ethernet frame processing. The module maintains its own TCP/IP stack in firmware, handling ARP resolution, TCP session management, and protocol framing autonomously.

EMC Design: The module’s PCB layout employs a split ground plane strategy — the backplane-side digital ground is isolated from the Ethernet-side ground through a common-mode choke network at the RJ-45 magnetics. This arrangement attenuates conducted noise from the backplane bus before it reaches the Ethernet cable, achieving compliance with IEC 61000-4-4 (electrical fast transient) at 2 kV and IEC 61000-4-5 (surge) at 1 kV line-to-earth. The RJ-45 port incorporates integrated transformer isolation rated at 1500 Vrms, providing galvanic separation between the module’s internal circuitry and the plant Ethernet network.

EGD Scheduling Architecture: Ethernet Global Data operates on a producer-consumer model with configurable exchange periods as low as 1 ms. The module’s onboard scheduler maintains a time-stamped exchange table in local SRAM, transmitting UDP multicast frames at the configured interval without CPU intervention. This allows deterministic data distribution across multiple RX3i nodes — a capability that standard TCP-based polling cannot replicate without introducing jitter proportional to network load.

Redundancy Arbitration: In Hot Standby configurations paired with the IC695RMX128 redundancy module, the IC695ETM001-EM participates in the switchover arbitration sequence. During a primary CPU fault, the module detects the loss of backplane heartbeat within one scan cycle and re-establishes TCP sessions with connected SCADA clients from the secondary CPU’s context, typically completing the handover in under 200 ms — well within the tolerance of most SCADA polling intervals.

System Integration Benefits

• CPU Scan Isolation: Protocol processing is fully offloaded to the module’s dedicated processor, ensuring Ethernet communication load does not extend the RX3i CPU scan time or introduce scan jitter in time-critical control loops.
• Concurrent Multi-Protocol Operation: SRTP, Modbus TCP, and EGD run simultaneously on a single module, eliminating the need for separate gateway hardware in mixed-protocol environments and reducing panel wiring density.
• Deterministic EGD Data Distribution: UDP-based EGD exchanges deliver controller-to-controller data at sub-10 ms intervals with consistent timing, supporting coordinated motion and process control across distributed RX3i nodes.
• Hot Standby Failover Compatibility: Seamless integration with GE’s Hot Standby redundancy architecture enables sub-200 ms TCP session recovery during CPU switchover, maintaining SCADA visibility without operator intervention.
• Over-the-Network Firmware Updates: Firmware can be upgraded remotely via the Ethernet port using GE’s update utility, eliminating module extraction and reducing maintenance downtime in hard-to-access panel locations.
• Proficy Suite Native Integration: Direct compatibility with Proficy Machine Edition, Proficy HMI/SCADA iFIX, and Proficy Historian enables unified tag browsing, data logging, and alarm management without third-party OPC middleware.
• Diagnostic Transparency: The module exposes a structured fault table accessible through the CPU’s reference table (%I, %Q, %R address space), allowing PLC logic to read communication status, connection counts, and error codes directly — enabling automated fault annunciation without SCADA polling.
• Scalable Connection Capacity: With 32 SRTP and 16 Modbus TCP sessions available simultaneously, a single IC695ETM001-EM can serve multiple SCADA servers, HMI panels, historian clients, and third-party devices concurrently, deferring the need for additional communication modules as the system scales.

Quality Assurance & Global Logistics

Every IC695ETM001-EM unit supplied through siemensplc.com is sourced from verified distribution channels and subjected to a structured pre-shipment inspection protocol. Visual examination covers PCB surface condition, connector pin integrity, label authenticity, and housing markings against GE’s published part identification criteria. Each unit undergoes a functional power-on verification confirming correct LED initialization sequence and backplane communication handshake. Firmware version is recorded and cross-referenced against GE’s official release matrix prior to dispatch.

Units are packaged in anti-static (ESD) shielding bags, cushioned with closed-cell foam, and enclosed in double-wall corrugated cartons rated for international air freight handling. Export documentation — including commercial invoice, packing list, and certificate of origin — is prepared in compliance with destination country import requirements. Shipments originate from Xiamen, China, with access to DHL Express, FedEx International Priority, UPS Worldwide, and consolidated sea freight for volume orders. Typical transit times to Europe and North America via air express are 3–5 business days from dispatch. A 12-month warranty covers manufacturing defects and functional failures under normal operating conditions.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Website: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.