Configured for high-speed sequence processing in CS1 automation architectures, the Omron CS1G-CPU42H (CS1G-CPU42H CPU Unit) provides direct physical/electrical execution. It handles discrete control tasks through local and rack-expansion buses.

Architecture & System Hierarchy

• System Series: Omron CS1 Series PLC system
• Base CPU Architecture: CS1G High-Speed CPU
• I/O Capability: 960 local/expansion I/O points across maximum 2 expansion racks
• Execution Profile: Standard CPU architecture operating within single-rack or dual-expansion PLC configurations

Technical Characteristics

Deterministic Network & Backplane Integration

The CPU unit manages internal bus timing across the backplane bus communication velocity Licences framework, maintaining low-latency execution cycles for standard logic scans. It provides high I/O density scaling options over extended rack configurations while preserving firmware flash compatibility across standard CS-series expansion interfaces.

Standard Package & Ordering Information

• 1 x Omron CS1G-CPU42H CPU Unit
• 1 x Internal Battery (Pre-installed or boxed separately)
• 1 x Protective Terminal/Port Cover Set
• 1 x Quick Reference Technical Sheet

Mounting & Electrical Safety Instructions

• Turn off all system power supplies before seating or unseating the unit from the CPU rack base plate.
• Ensure the CPU module latches seat securely into the backplane connector to avoid intermittent contact errors.
• Maintain a minimum clear distance of 50 mm above and below the rack assembly to allow adequate thermal convection cooling.
• Connect the rack functional ground (FG) terminal directly to a clean panel earth using a heavy-gauge wire.

Technical Support FAQs

• How does the unit process memory allocation between DM and EM banks?

  DM memory provides 32K words of direct data area, while EM provides an additional 32K words in a single bank for extended storage.

• What is the current drain on the 5 VDC rack power bus?

  The CPU consumes 0.78 A from the internal 5 VDC backplane supply during normal operation.

• What is the maximum physical I/O expansion capability?

  It addresses up to 960 local and expansion I/O points across a maximum of 2 expansion racks.

• What execution speed can be expected for basic instruction scans?

  Basic logical instructions such as LD execute in 0.04 us per instruction.

• What memory backup mechanism prevents data loss during power outages?

  An internal battery retains program and data memory contents during system power interruptions.

• What ambient temperature range is allowable for continuous rack operation?

  The unit operates within standard panel limits ranging from 0 to 55 deg C.

• How are local program steps stored within the internal memory architecture?

  The unit provides 10K steps of program capacity to execute ladder logic and control sequences.

• What physical precautions should be observed when wiring functional earthing?

  The functional ground terminal must be wired with low-impedance grounding connections to reduce noise susceptibility.