Description
trait
Hot Standby redundancy: Support for hot standby redundancy allows two RX3i cpus to be set up and configured to perform the same function in a given application, minimizing downtime for time-critical applications.
Communication interface: It has two built-in serial communication ports, namely an RS-232 port and an RS-485 port, which supports communication through the backplane bus and Ethernet interface module.
Flexibility and scalability: Support for most 90-30 series modules and expansion racks, as well as configurable data and program memory.
Memory and storage: Contains redundant memory switch modules, configured as redundant links in each cell, support for automatic location of symbolic variables and a large amount of user memory. 
Parameters and specifications
Processor: Intel Celeron-M microprocessor at 1 GHz.
Memory:
64 megabytes of battery backup user memory
64 megabytes of non-volatile flash user memory
Power requirements:
+3.3 volts DC: 1.0 amp nominal value
+5 volts DC: 1.2 amps nominal value
Operating temperature: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)
Time clock accuracy: Maximum drift of 2 seconds per day
Blocks: Up to 512 blocks are supported, each with a maximum size of 128KB
Programming support: Use ladder diagram, structured text, functional block diagram and C language programming
Serial protocol: Support Modbus RTU slave, SNP, etc
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