1-4  VersaMax Modules, Power Supplies and CarriersUser Manual  GFK-1504N 
 
1 
CPU Modules for VersaMax PLCs 
A VersaMax PLC consists of a group of VersaMax modules with a VersaMax 
CPU and attached power supply in the first position.  
 
All VersaMax CPUs provide powerful PLC functionality. They are designed to 
serve as the system controller for up to 64 modules with up to 2048 I/O points. 
Two serial ports provide RS-232 and RS-485 interfaces for SNP slave and RTU 
slave communications. 
VersaMax CPUs are described in GFK-1503, VersaMax PLC User’s Manual. 
This document also provides programming information for the VersaMax PLC. 
Basic CPU Features 
  Programming in Ladder Diagram, Sequential Function Chart,  and 
Instruction List 
  Floating point (real) data functions 
  Non-volatile flash memory for program storage 
  Battery backup features for program, data, and time of day clock 
  Super capacitor provides power to memory for 1 hour 
  Over 1 hour, backup battery protects memory contents up to 6 months. 
  Backup battery has shelf life of 5 years when not in use. 
  Run/Stop switch 
  Embedded RS-232 and RS-485 communications