OMRON CJ1W-IDP01 DC Input Module

The OMRON CJ1W-IDP01 is a digital DC input module designed for the CJ1 series programmable logic controllers. It provides 16 input points, each rated for 24 V DC, with a fast response time of less than 0.5 ms. This module is particularly suited for applications requiring high‑speed signal acquisition, such as position sensing, encoder feedback, and emergency stop monitoring. It also includes an interrupt function, allowing selected inputs to trigger immediate CPU task execution without waiting for the scan cycle.

The CJ1W‑IDP01 features opto‑isolation between the inputs and the PLC backplane, ensuring noise immunity and protecting the CPU from field surges. It includes LED indicators for each input, as well as a module status LED. The module uses removable screw‑type terminal blocks for easy wiring. Its compact size fits in a single slot, making it efficient for space‑constrained control panels.

Technical Specifications

• Number of inputs: 16 (24 V DC, sink/source selectable)

• Input voltage range: 20.4‑26.4 V DC

• Input current: 4.1 mA typical at 24 V DC

• ON voltage: ≥ 15 V DC

• OFF voltage: ≤ 5 V DC

• Response time (OFF‑ON): < 0.5 ms

• Response time (ON‑OFF): < 0.5 ms

• Input filter: Programmable (0, 0.5, 1, 2, 4, 8, 16, 32 ms)

• Interrupt inputs: Up to 4 channels (configurable)

• Isolation: Photocoupler isolation (between inputs and bus)

• Internal power consumption: 5 V DC, 70 mA (from backplane)

• I/O allocation: 1 input word (16 points)

• Dimensions: 90 x 65 x 85 mm (H x W x D)

• Operating temperature: 0°C to +55°C

• Certifications: CE, UL, RoHS

Key Features

• High‑speed response: The fast response time (< 0.5 ms) captures rapid signals from sensors, such as pulse encoders and proximity switches.

• Interrupt function: Up to four inputs can be configured to generate an interrupt, triggering a dedicated task (e.g., emergency stop handling) within microseconds.

• Programmable filter: Each input can have its own filter delay to prevent false triggers from contact bounce or noise.

• LED status: Individual LEDs show the state of each input, enabling quick diagnostic checks.

Typical Applications

• Packaging machinery: Detecting product presence and counting with high‑speed photoelectric sensors.

• Printing presses: Receiving registration marks and position feedback for synchronisation.

• Machine safety: Interfacing with emergency stop pushbuttons and safety interlocks using the interrupt function.

• Material handling: Monitoring product flow and triggering diverters based on sensor input.

Integration and Configuration

The CJ1W‑IDP01 is installed in a CJ1 rack and automatically assigned an I/O address. In CX‑Programmer, the user can configure the input filter time for each channel and designate which inputs serve as interrupts. The interrupt routine is programmed separately and is executed immediately upon a rising or falling edge of the selected input. The module’s status is readable via the PLC’s diagnostic area. Wiring is straightforward: connect the 24 V DC supply common and individual sensor signals to the terminal block.

Installation Notes

Mount the module in any available slot, ensuring proper locking. Use shielded cables for long input runs to avoid induced noise. The terminal block is removable for convenience. For interrupt inputs, ensure the signal source has a clean, glitch‑free transition to avoid false triggers. The module has no user‑serviceable parts; maintenance is limited to checking connections and cleaning the housing.

Compliance

The CJ1W‑IDP01 meets EN 61131‑2, EN 61000‑6‑2, and EN 61000‑6‑4 standards. It carries CE and UL (cULus) approvals, and is RoHS compliant.

Conclusion

The OMRON CJ1W‑IDP01 input module offers high‑speed, reliable digital input capabilities with added flexibility through programmable filtering and interrupt handling. It is an ideal choice for applications requiring rapid response to external events in CJ1 PLC systems.