Overview

The RX3i CPU is designed for real-time control of machines, processes, and material handling systems. It communicates with programming and HMI devices through a serial port using the SNP Slave protocol. The CPU interacts with I/O and smart option modules via a dual backplane bus that offers the following features:

• High-speed PCI backplane for fast throughput of new advanced I/O.
• Serial backplane for easy migration from existing Series 90-30 I/O.

Specifications

• CPU Performance: Refer to Appendix A of the PACSystems CPU Reference Manual, GFK-2222P or later for detailed performance data.
• Battery:
  • Lithium Smart Battery, IC695ACC302 (recommended)
  • Series 90-30 Lithium Battery Pack, IC693ACC302
  • Note: The IC698ACC701 Lithium Battery Pack is not compatible with the CPU315.
• Program Storage:
  • 20 MB of battery-backed RAM
  • 20 MB of non-volatile flash user memory
• Power Requirements:
  • +3.3 VDC: 1.0 Amps nominal
  • +5 VDC: 1.2 Amps nominal
• Operating Temperature:
  • 0 to 60°C (32°F to 140°F)
• Floating Point: Supported
• Boolean Execution Speed:
  • Typical: 0.047 ms per 1000 Boolean instructions
• Time of Day Clock Accuracy:
  • Maximum drift of 2 seconds per day
• Elapsed Time Clock (Internal Timing) Accuracy:
  • 0.01% maximum
• Embedded Communications:
  • RS-232, RS-485
• Serial Protocols Supported:
  • Modbus RTU Slave
  • SNP
  • Serial I/O
• Backplane:
  • Dual backplane bus support: RX3i PCI and high-speed serial bus
• PCI Compatibility:
  • Designed to be electrically compliant with PCI 2.2 standard
• Program Blocks:
  • Up to 512 program blocks
  • Maximum size per block: 128KB
• Memory:
  • %I and %Q: 32Kbits for discrete
  • %AI and %AQ: Configurable up to 32Kwords
  • %W: Configurable up to the maximum available user RAM
  • Symbolic: Configurable up to 20 MB