GE IC695NIU001 PACSystems RX3i Ethernet Network Interface Unit

Description

Hardware & Electrical Specifications

‑ Model: IC695NIU001 ‑ Part Number: IC695NIU001 ‑ Module Type: RX3i Ethernet Network Interface Unit, occupies 1 single slot (CPU slot) on universal backplane ‑ Mounting: RX3i universal main‑rack backplane IC695CHS series; cannot be used as expansion‑rack slave module ‑ Backplane power consumption:  • +3.3 VDC: 400 mA nominal  • +5 VDC: 600 mA nominal ‑ Local logic capacity: Max 20 K Boolean instructions, no C‑language support ‑ Non‑volatile flash memory: 10 MB for local data retention ‑ I/O capacity for remote station:  • Discrete %I / %Q: 32 K bits  • Analog %AI / %AQ: 32 K words each ‑ EGD data exchange limit:  • Output data from master to NIU: maximum 1300 bytes  • Input data from NIU to master: maximum 1300 bytes ‑ On‑board communication interfaces:  • COM1: RS‑232 D‑sub 9‑pin, Modbus‑RTU Slave, SNP‑Slave  • COM2: RS‑485 half‑duplex, Modbus‑RTU Master/Slave, SNP‑Slave ‑ Ethernet: No onboard RJ45 port; must work with IC695ETM001 module on same backplane ‑ Supported protocols: EGD, SRTP, Modbus‑TCP, Modbus‑RTU, SNP ‑ RTC real‑time clock: Lithium battery backup, typical service life 5 years ‑ Expansion capacity: Maximum 8 local expansion racks for remote I/O station ‑ Hot‑swap: Supported for module replacement under power‑on condition (firmware V2.51 or higher) ‑ Diagnostics: Module self‑test, backplane bus fault, EGD communication status, serial port error counter, remote I/O health monitoring ‑ PCB treatment: Conformal coated for dust, moisture and corrosion resistance ‑ Compatibility note: Compatible with IC695, IC694 and legacy IC693 Series‑90‑30 I/O modules with restrictions. Can communicate with single or redundant hot‑standby RX3i master CPUs. Full hardware configuration download and EGD exchange validation test must be performed after replacement.

Environmental Specifications

‑ Operating temperature: 0 ℃ ~ +60 ℃ ‑ Storage temperature: ‑40 ℃ ~ +85 ℃ ‑ Relative humidity: 5%‑95% non‑condensing ‑ Installation location: Indoor control cabinet, IP20 protection class ‑ EMC compliance: IEC 61000‑6‑2 ‑ Certifications: CE, UL Class I Div 2 hazardous‑location certification

Mechanical Data

‑ Weight: approx 0.62 kg ‑ Dimension: RX3i single‑slot module form‑factor ‑ Handling note: ESD‑sensitive circuitry. Periodically inspect RTC lithium‑battery aging status. Ethernet connectivity fully depends on IC695ETM001 module.

Main Functions

1. Acts as controller for distributed remote RX3i I/O station. Manages local and expansion‑rack I/O modules on its own backplane, exchanges input/output data with central master CPU automatically via EGD over Ethernet. Supports redundant master CPU system for high‑availability architecture.
2. Limited local logic execution capability for simple standalone processing at remote site. Two serial ports for Modbus‑RTU field instrument connection.
3. Runtime status of NIU and remote I/O is embedded within EGD messages and reported to master controller for fault diagnosis.
4. Front‑panel LED indicators:   ‑ Green NIU OK: NIU module hardware normal   ‑ Red SYS FAULT: Hardware / configuration / communication fault   ‑ NIU SCANNING I/O: Remote I/O scanning active   ‑ OUTPUTS ENABLED: Output channel enabled   ‑ I/O FORCE: I/O force function active   ‑ COM1 / COM2: Serial port communication activity status

Installation & Wiring Requirements

1. Cut off full rack power supply for initial installation; hot‑swap replacement is allowed if firmware requirement is satisfied. Apply ESD protection during module handling.
2. Insert IC695NIU001 into CPU slot of RX3i universal backplane and engage locking latch. Install IC695ETM001 Ethernet module on same backplane for network access. Configure power supply and all I/O/expansion modules according to system layout.
3. Serial wiring comply with GE RX3i hardware manual. Use shielded twisted‑pair for RS‑485 bus and install terminating resistor at bus end. Reliable protective‑ground connection is required. Configure EGD exchange parameters in Proficy Machine Edition for master‑NIU data mapping.
4. After replacement: Power‑on rack power, check front‑panel LED status. Download hardware configuration and application project. Verify EGD data exchange between master CPU and NIU, test remote I/O signal and serial communication links.
5. Replacement note: Confirm total backplane power‑supply load budget. Inspect RTC battery health. Validate remote‑station fault reporting mechanism. Full‑system commissioning test is mandatory before putting into service.