Product Overview
As industrial automation evolves, the need for seamless integration between legacy and modern systems grows. The GE IC695NIU001 PACSystems RX3i Ethernet Network Interface Unit (ENIU) addresses this challenge directly. Manufactured by Emerson Automation, this module bridges PACSystems RX3i CPUs with Series 90-30 I/O modules over Ethernet. It supports Ethernet connectivity via the backplane-installed Ethernet Interface Module (IC695ETM001). With built-in 10 MB flash memory and upgradeable firmware, the IC695NIU001 ensures your system stays current without hardware replacement.
Technical Specifications
The IC695NIU001 operates on dual backplane buses: RX3i PCI and 90-30-style serial. Power requirements are +3.3 VDC at 1.25 Amps nominal and +5 VDC at 1.0 Amps nominal. Internal power consumption is 0.52 A at 3.3 V DC and 0.95 A at 5 V DC. The module supports an operating temperature range of 0 degrees C to 60 degrees C (32 degrees F to 140 degrees F). It features two communication ports configurable for RS-232 or RS-485, supporting serial protocols including Modbus RTU Slave, SNP, Serial I/O, and Modbus RTU Master via application "C" block. Floating-point math is supported. The module occupies a single slot and is PCI 2.2 compliant.
Industry Applications
In manufacturing plants, the IC695NIU001 enables remote I/O control across distributed zones. For example, a packaging line using Series 90-30 I/O can integrate with a modern RX3i controller for centralized monitoring. In oil and gas facilities, the module's Modbus RTU Master capability allows communication with legacy field devices, reducing upgrade costs. The ENIU's Ethernet Global Data (EGD) exchange provides real-time status updates, critical for process control.
Installation and Setup Guidance
Install the IC695NIU001 into a single slot of an RX3i universal backplane. Ensure the backplane supports dual bus (RX3i PCI/90-30 Serial). Connect the Ethernet Interface Module (IC695ETM001) to the backplane for network access. Configure the module using Machine Edition Logic Developer software version 5.51 or later. Set COM1 and COM2 ports for RS-232 or RS-485 as needed. For serial communication, select the appropriate protocol (Modbus RTU Slave, SNP, Serial I/O, or Modbus RTU Master). The module's firmware is upgradeable in-system via the Ethernet connection.
Maintenance and Reliability
Routine inspection of the IC695NIU001 includes checking for proper ventilation and ensuring the operating temperature stays within 0 degrees C to 60 degrees C. The battery-backed real-time clock uses a replaceable lithium battery (IC695ACC302 recommended). Monitor the module's diagnostic tools through the software for early fault detection. The ENIU's comprehensive station diagnostics help identify communication issues before they cause downtime.
Compatibility and Integration
The IC695NIU001 integrates with PACSystems RX3i CPUs and Series 90-30 I/O modules. It supports dual backplane buses (RX3i PCI and 90-30 Serial). Communication protocols include SNP, Modbus Slave, Serial I/O, and Modbus Master. The module exchanges Ethernet Global Data (EGD) with master devices for system control. It also supports SRTP for IP/TCP services. Optional expansion backplanes from Series 90-30 can be added. The module is compatible with PCI 2.2 standard.
Selection Guide and Purchasing Advice
Before purchasing the IC695NIU001, verify your system's backplane type (RX3i PCI or 90-30 Serial) and power supply capacity. Ensure you have the required Ethernet Interface Module (IC695ETM001). Consider ordering an NIU kit (IC695NTK001 or IC695NTK002) for a complete assembly. SpareTechPLC offers this module with expert support to confirm compatibility with your existing PACSystems or Series 90-30 setup. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
