First TwinCAT PLC Project on a Beckhoff IPC
Build and verify a first TwinCAT PLC project on a Beckhoff IPC. This checklist covers target selection, EtherCAT discovery, I/O mapping, safe activation, restart tests, and commissioning records.
Manufacturer: Omron
Product No.: CJ1W-SP001/24VDC?2EA
Country of origin:Japan
Product Type: PLC Spacer Modules
Payment: T/T, Western Union
Weight: 2000g
Dimensions: 12.0 x 10.0 x 5.0 cm
Shipping port: Xiamen
Warranty: 12 months
Maintaining clean backplane connections and physical structural continuity within SYSMAC control systems, the Omron CJ1W-SP001/24VDC-2EA serves as a dedicated hardware slot reservation spacer for CJ-Series PLC racks. This passive module occupies unused slot positions on CPU racks or expansion racks, protecting the delicate backplane slide-lock connectors from environmental contaminants, physical impacts, and electrostatic discharge. Deploying these units ensures your system layout remains organized, mechanically rigid, and prepared for seamless future I/O card hot-swaps or system expansions without modifications to existing DIN rail configurations.
| Parameter | Specification |
|---|---|
| Manufacturer | Omron Industrial Automation |
| Model Reference | CJ1W-SP001/24VDC-2EA |
| Compatible Platform | SYSMAC CJ1 / CJ2 Series |
| Module Type | Space Unit (Spacer / Dummy Module) |
| Current Consumption (Internal) | 0 mA (Passive Unit) |
| Mounting Method | DIN Rail or Backplane Rack Slide-Lock |
| Operating Temperature Range | 0 to 55 degC |
| Storage Temperature Range | -20 to 75 degC |
| Humidity (Non-condensing) | 10% to 90% RH |
| Shipping Weight (Calculated) | 0.3 kg (Calculated) |
| Package Dimensions (Calculated) | 12.0 x 10.0 x 5.0 cm |
The CJ1W-SP001 functions as a universal physical blank for the entire CJ-series lineup (including CJ1G, CJ1H, CJ1M, and CJ2M). Unlike active bus termination units, this module does not terminate communications signals but instead acts as a bridge to physically secure the rack structure on long DIN rails. Note that if you are designing a system where heat dissipation is critical, placing space units adjacent to high-current analog modules can optimize convective airflow pathways inside the panel.
While this spacer is mechanically identical to standard I/O cards, it must not be assigned any I/O addresses in the PLC configuration software (CX-Programmer or Sysmac Studio). The software configuration should simply skip the physical slot position where the space unit is mounted. Ensure that you do not force active CPU-bus communication cycles to an empty slot, as this may result in rack configuration discrepancies or localized bus faults.
Always isolate the main control panel power supply before mounting, unmounting, or sliding modules on the CJ-series rack. Moving modules while the system is energized can cause electrical arcing, damage the backplane bus interface pins, or fault the CPU module.
Ensure that the power supply module (e.g., CJ1W-PA201) is fully de-energized.
Hook the top rear hook of the space unit onto the standard 35mm DIN rail and press the module downward until it snaps into position.
Slide the module laterally to connect it flush with the adjacent active module on the rack.
Locate the yellow slide-lock tabs on the top and bottom of the adjacent module and slide them fully toward the space unit to lock the assembly structurally.
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Returns & Warranty

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Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Japan
|