Description
Product Overview
The Emerson IC698PSA100 is a dedicated redundant power supply adapter belonging to Emerson’s RX3i series of PLC systems, engineered to work seamlessly with RX3i power supply modules such as the Emerson IC698RMX016. As a “reliability enhancer” for industrial control power systems, Emerson IC698PSA100 enables dual-power redundancy (N+1 configuration)—connecting two identical RX3i power supplies (e.g., two Emerson IC698RMX016 modules) to the same PLC rack. This setup ensures that if one power supply fails (due to component damage, input voltage loss, or overheating), the other automatically takes over within ≤10ms, maintaining uninterrupted DC power to the PLC CPU, I/O modules, and peripherals.
In high-availability industrial scenarios (e.g., nuclear power auxiliary control, continuous chemical processing), Emerson IC698PSA100 eliminates single points of failure in the power system—a critical risk for traditional single-power setups. Unlike generic redundancy adapters, Emerson IC698PSA100 is fully optimized for RX3i power supplies, supporting their full output capacity (up to 16A per power supply) without voltage drops or current limitations. It also integrates real-time fault monitoring, sending failure alerts to the RX3i CPU via the backplane bus—allowing operators to address faulty power supplies without system shutdowns. For customers using Emerson IC698RMX016 in mission-critical applications, Emerson IC698PSA100 is an essential accessory to achieve 99.999% power supply availability.
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | Emerson IC698PSA100 |
| Manufacturer | Emerson Automation Solutions |
| Product Type | RX3i Series Redundant Power Supply Adapter |
| Compatible Power Supplies | Emerson RX3i power modules: Emerson IC698RMX016 (16A), IC698RMX008 (8A) |
| Redundancy Configuration | N+1 (supports 2 power supplies per adapter) |
| Switchover Time | ≤10ms (automatic, no manual intervention) |
| Input Compatibility | Matches connected power supply input: 85V AC–264V AC (for Emerson IC698RMX016) |
| Output Capacity | Supports total output current up to 16A (when paired with two Emerson IC698RMX016 modules) |
| Fault Monitoring | Real-time failure detection (power supply loss, overcurrent, overvoltage); alerts via RX3i backplane bus |
| Physical Dimensions | 120mm (L) × 80mm (W) × 30mm (D) (rack-mountable, fits RX3i standard racks) |
| Operating Environment | Temperature: 0°C to +60°C; Humidity: 5%–95% (non-condensing); Altitude: ≤2000m |
| Compatibility | Emerson RX3i PLC racks: IC698Rack10 (10-slot), IC698Rack20 (20-slot); RX3i CPU modules: IC698CPU310, IC698CPU330 |
| Protection Features | Reverse polarity protection (input wiring); Over-temperature protection (shutdown at 85°C); Short-circuit protection (output side) |
| Certifications | UL 61010-1; CSA C22.2 No. 61010-1; CE (EMC: EN 61326-1; Low voltage: EN 60950-1); ATEX Zone 2 (optional, for hazardous areas) |
| Mounting Requirements | Installed between two power supplies in RX3i rack; requires adjacent slots for power modules |

IC698PSA100
Main Features and Advantages
Ultra-Fast Automatic Switchover: The Emerson IC698PSA100 achieves a switchover time of ≤10ms when one power supply fails—far faster than the 50ms+ switchover of generic adapters. This speed ensures no voltage interruptions to the PLC system, preventing logic errors or I/O module resetting. For example, in a nuclear power plant’s auxiliary feedwater control system using two Emerson IC698RMX016 modules with Emerson IC698PSA100, a sudden failure of one power supply was undetectable by the PLC—ensuring continuous operation of critical safety equipment.
Seamless Compatibility with RX3i Power Supplies: Unlike third-party redundancy adapters that often limit power output (e.g., reducing Emerson IC698RMX016’s 16A capacity to 12A), Emerson IC698PSA100 fully supports the maximum output of RX3i power modules. It is pre-calibrated to match the voltage and current characteristics of Emerson IC698RMX016 and IC698RMX008, eliminating compatibility issues such as voltage spikes or current imbalance. A chemical plant in Germany paired two Emerson IC698RMX016 modules with Emerson IC698PSA100—the system maintained full 16A output without performance degradation, powering 15 I/O modules reliably.
Real-Time Fault Monitoring and Alerts: Emerson IC698PSA100 integrates built-in fault detection for both connected power supplies, monitoring parameters such as input voltage, output current, and internal temperature. When a fault is detected (e.g., a Emerson IC698RMX016 module overheats), the adapter sends a digital alert to the RX3i CPU via the backplane bus. Operators can view the fault details (e.g., “Power Supply 1 Over Temperature”) on the HMI, allowing them to replace the faulty module during scheduled maintenance—avoiding unplanned downtime. A refinery in Texas used this feature to identify a failing Emerson IC698RMX016 module 24 hours before complete failure, replacing it during a shift change with no production impact.
Compact Design for Space Efficiency: Emerson IC698PSA100 features a slim 30mm depth design, fitting between two power supplies in an RX3i rack without occupying additional slot space. Unlike bulky external redundancy units that require separate cabinet space, it integrates directly into the existing PLC rack—reducing cabinet volume by 40% compared to external solutions. A automotive assembly plant in Mexico used Emerson IC698PSA100 in a 10-slot RX3i rack, fitting two Emerson IC698RMX016 modules and the adapter without sacrificing space for I/O modules.
Application Field
The Emerson IC698PSA100 is essential for high-availability industrial control systems using RX3i PLCs, with three key application scenarios. In nuclear power auxiliary control (e.g., spent fuel pool cooling systems), Emerson IC698PSA100 pairs two Emerson IC698RMX016 modules to ensure uninterrupted power for safety-critical PLCs. Its ATEX Zone 2 certification (optional) allows use in radioactive environments, and its fast switchover prevents cooling system shutdowns—critical for nuclear safety. A nuclear power plant in South Korea deployed Emerson IC698PSA100, achieving 0 power-related outages over 3 years.
In continuous chemical processing (e.g., polyethylene production lines), Emerson IC698PSA100 eliminates the risk of power failures causing process interruptions— which can lead to $100,000+ in losses per hour. A chemical plant in the Netherlands used two Emerson IC698RMX016 modules with Emerson IC698PSA100 to power its RX3i PLC system; a faulty power supply was detected and replaced during a scheduled break, with no impact on production. The system maintained 99.999% availability, exceeding the plant’s 99.9% target.
In municipal water treatment (e.g., drinking water purification plants), Emerson IC698PSA100 ensures PLCs controlling filtration and disinfection systems never lose power—preventing contaminated water from entering the distribution network. A water treatment plant in Canada paired Emerson IC698PSA100 with two Emerson IC698RMX016 modules; a winter storm caused a temporary failure of one power supply, but the adapter switched over instantly—maintaining continuous disinfection and avoiding a boil-water advisory.
Related Products
Emerson IC698RMX016: Primary power supply module compatible with Emerson IC698PSA100—two Emerson IC698RMX016 modules paired with Emerson IC698PSA100 form a 16A redundant power system.
Emerson IC698RMX008: 8A low-capacity power supply for Emerson IC698PSA100—suitable for small RX3i systems requiring redundancy (e.g., 5-slot racks with ≤8 I/O modules).
Emerson IC698CPU330: RX3i CPU module that receives fault alerts from Emerson IC698PSA100—displays power supply status on the HMI and logs failure events.
Emerson IC698Rack10: 10-slot RX3i rack for mounting Emerson IC698PSA100 and two power supplies—provides mechanical compatibility and backplane connectivity.
Emerson IC698HMI001: RX3i HMI module that visualizes Emerson IC698PSA100 status—shows which power supply is active and alerts operators to failures.
Emerson IC698CBL002: Redundant power wiring harness for Emerson IC698PSA100—simplifies connection between the adapter and two power supplies, reducing wiring errors.
Emerson IC698DIAG001: RX3i diagnostic module that enhances Emerson IC698PSA100’s fault monitoring—adds temperature and voltage trending for predictive maintenance.
Emerson IC698ENET001: RX3i Ethernet module that transmits Emerson IC698PSA100 fault alerts to remote monitoring systems—enables off-site troubleshooting for distributed plants.

IC698PSA100
Installation and Maintenance
Pre-installation preparation: First, confirm that the RX3i rack (e.g., IC698Rack10) has two adjacent slots for the power supplies and that the connected power modules are identical (e.g., two Emerson IC698RMX016 modules). Turn off all AC power to the rack before installation to avoid electric shock. Mount Emerson IC698PSA100 between the two power supply slots, ensuring it is firmly seated in the rack’s backplane. Use the dedicated IC698CBL002 wiring harness to connect Emerson IC698PSA100 to both power supplies—do not use generic wires, as they may cause voltage drops. After wiring, verify that the adapter’s LED (green for normal, red for fault) illuminates green when power is restored.
Maintenance recommendations: Conduct monthly visual inspections of Emerson IC698PSA100—check that the green LED is lit (indicates normal operation) and that wiring connections are tight (loose harnesses can cause switchover delays). Use the RX3i CPU’s diagnostic tool quarterly to test the redundancy switchover: simulate a failure of one Emerson IC698RMX016 module (by disconnecting its AC input) and confirm that Emerson IC698PSA100 switches to the second power supply within ≤10ms. If the red LED illuminates, first check for loose wiring or a faulty power supply; if the issue persists, replace Emerson IC698PSA100 (do not disassemble it, as this voids the warranty). Clean the adapter’s exterior with a dry brush every 6 months (in dusty environments) to maintain heat dissipation.
Product Guarantee
Emerson provides a 36-month quality guarantee for Emerson IC698PSA100, covering manufacturing defects, switchover failures, and fault monitoring errors under normal operating conditions. During the guarantee period, if Emerson IC698PSA100 malfunctions (e.g., switchover time exceeds 10ms, fault alerts fail to trigger), Emerson will provide a free replacement adapter and cover all shipping costs (domestic and international). Additionally, Emerson offers 24/7 global technical support for Emerson IC698PSA100, including remote switchover testing guidance and on-site installation support for critical systems (e.g., nuclear power plants) within 48 hours. For customers with long-term service contracts, Emerson provides annual redundancy system audits—verifying Emerson IC698PSA100’s performance and ensuring compatibility with paired Emerson IC698RMX016 modules. This guarantee reflects Emerson’s commitment to delivering reliable redundancy solutions for industrial control systems.
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Full 12-month warranty on all components