Beckhoff CX1100-0900 CX Series UPS Module

Description

Designed to provide reliable short-term backup power for Embedded PCs, the Beckhoff CX1100-0900 utilizes capacitive storage technology to safeguard critical system data during sudden power interruptions. By interfacing directly with the host controller via the internal PC/104 system bus, this module enables maintenance-free protection without the degradation risks associated with traditional battery-backed systems. The unit serves as a dependable buffer, allowing the PLC application to write active process states and retain variables directly to persistent memory before a complete system shutdown.

Features

• Capacitive Energy Storage: Eliminates battery maintenance, wear, and thermal degradation risks, offering an extended service life.
• Adjustable Retention Time: Configuration options allow load-dependent adjustment of backup intervals to match specific application demands.
• Integrated PC/104 Interface: Utilizes a 16-bit ISA hardware interface for high-speed, direct communication with CX series CPU modules.
• Comprehensive Status Monitoring: Front-panel diagnostic LEDs provide immediate visual state feedback for Input, Output, and Charge status.

Applications

• Protection of persistent variables and runtime data in Beckhoff CX1000, CX1020, and CX1030 Embedded PC systems.
• Executing controlled shutdown sequences for complex material handling and assembly machinery.
• Safeguarding recipe parameters and active batch logs in process plants during localized power failures.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

The CX1100-0900 belongs strictly to the first-generation CX control family (CX1000, CX1010, CX1020, CX1030). It is connected directly via the standard 16-bit PC/104 system bus on the left side of the CPU. This module is physically incompatible with newer Beckhoff Embedded PC series, such as the CX2000 or CX5100, which rely on PCIe-based bus extensions. For system migrations, verify that the existing PLC code utilizes the legacy TwinCAT system libraries rather than modern unified-UPS functions.

Application Pitfalls & Engineering Notes

Capacitive modules are designed for high-density, ultra-short-term backup applications. A total capacity of 20 As means that at the maximum rated current draw of 550 mA, the module can sustain power for approximately 36 seconds. This duration is strictly intended to execute write-to-disk or write-to-NOVRAM routines. It must not be treated as a continuous operational power supply. Thermal control is critical: operating continuously near the 55 degC limit accelerated the natural aging profile of internal double-layer capacitors, reducing actual hold-up performance over time.

Commissioning & Wiring Tips

Upon initial installation, the internal capacitors require a brief charging phase. If the charge LED is flashing or off, the module will not support full system ride-through during a power dip. Ensure your TwinCAT PLC project implements the FB_S_UPS function block. This block must be configured with the specific parameters of the CX1100-0900 to ensure that the persistent data-saving task is given execution priority immediately when the power supply status transitions from normal to battery/backup mode.

Installation Guidelines