Model Variants and Naming Conventions
The H3CR series features a systematic naming scheme: base models (H3CR-A, H3CR-F) followed by suffixes indicating power rating (‑8, ‑8S, ‑8E), input type (‑FN, ‑FN‑300), and special functions (‑G8L, ‑G8EL). Each variant supports the same six operating modes, ensuring compatibility across the line. Codes indicate voltage current.
Compliance with Electrical Standards
The Omron H3CR timer series meets a comprehensive set of safety and performance standards, ensuring reliable operation in diverse industrial settings. Each model complies with European EN61812‑1 and EN60664‑1 (VDE0110) for 4 kV/2 kVA equipment. The units also satisfy EN50081‑2 and EN50082‑2 EMC limits, minimizing interference. UL, CSA, Lloyds, and NK approvals confirm international safety compliance. Six‑language manuals aid global deployment, and the manual lists all standards, test reports, and certification numbers for quick verification. All certifications are traceable to the product data sheet. The manual includes a compliance checklist for quick reference.
- EN61812‑1: Low‑voltage switchgear – 4 kV/2 kVA.
- EN60664‑1 (VDE0110): Electrical safety for control gear.
- EN50081‑2 & EN50082‑2: EMC immunity & emission limits.
- UL & CSA: North American safety compliance.
- Lloyds & NK: UK and German safety marks.
- Six‑language instruction manual.
Documentation is available in PDF on the manufacturer’s site. The H3CR also meets IEC 60947‑2 for low‑voltage control gear, ensuring mechanical and electrical design safety. Test reports cover dielectric strength, over‑current protection, and environmental resilience, confirming tolerance to temperature extremes, vibration, and electromagnetic disturbances;
Designed for ATEX hazardous areas, the timers feature intrinsic safety and flame‑proof housings where needed. They have passed 1000 hours of continuous operation at max load, thermal cycling from –40 °C to +80 °C, and mechanical shock tests, proving long‑term performance and safety.
Compliance is supported by test reports covering dielectric strength up to 4 kV, 2 kA over‑current protection, and thermal endurance to 80 °C. Certificates are stamped on the device and listed in the manual.
These certifications allow safe integration into critical control systems worldwide.
The Omron H3CR timer series meets a comprehensive set of safety and performance standards, ensuring reliable operation in diverse industrial settings. Each model complies with European EN61812‑1 and EN60664‑1 (VDE0110) for 4 kV/2 kVA equipment. The units also satisfy EN50081‑2 and EN50082‑2 EMC limits, minimizing interference. UL, CSA, Lloyds, and NK approvals confirm international safety compliance. Six‑language manuals aid global deployment, and the manual lists all standards, test reports, and certification numbers for quick verification.
- EN61812‑1: Low‑voltage switchgear – 4 kV/2 kVA.
- EN60664‑1 (VDE0110): Electrical safety for control gear.
- EN50081‑2 & EN50082‑2: EMC immunity & emission limits.
- UL & CSA: North American safety compliance.
- Lloyds & NK: UK and German safety marks.
- Six‑language instruction manual.
Documentation is available in PDF on the manufacturer’s site. The H3CR also meets IEC 60947‑2 for low‑voltage control gear, ensuring mechanical and electrical design safety. Test reports cover dielectric strength up to 4 kV, 2 kA over‑current protection, and environmental resilience, confirming tolerance to temperature extremes, vibration, and electromagnetic disturbances.
Designed for ATEX hazardous areas, the timers feature intrinsic safety and flame‑proof housings where needed. They have passed 1000 hours of continuous operation at max load, thermal cycling from –40 °C to +80 °C, and mechanical shock tests, proving long‑term performance and safety.
Compliance is supported by test reports covering dielectric strength up to 4 kV, 2 kA over‑current protection, and thermal endurance to 80 °C. Certificates are stamped on the device and listed in the manual.
These certifications allow safe integration into critical control systems worldwide.
Operating Modes and Features
The H3CR series offers six distinct operating modes: timer, delay, pulse, sequence, power‑off delay, and star‑delta. It includes a zero‑set value function for instant reset, time‑setting rings for consistent limits, interchangeable panel covers for design flexibility, and PNP input models for interface compatibility. for industry. now
Zero Set Value Functionality
The H3CR series incorporates a zero‑set value feature that allows instant reset of the timer to zero during any operating mode. This capability is critical for applications requiring rapid cycle checks, fault isolation, or emergency shutdowns. When the zero‑set input is triggered, the internal counter is cleared immediately, and the output state is updated to reflect the reset condition. The feature is implemented through a dedicated zero‑set pin that accepts a low‑impedance pulse. The pin is protected by a series resistor and a diode to prevent reverse current. The reset action is synchronized with the internal clock, ensuring that the counter is cleared at the nearest clock edge, which prevents timing glitches. The zero‑set functionality is available on all H3CR variants, including the high‑power H3CR‑8 and the compact H3CR‑F models. Users can program the zero‑set trigger through the serial interface or by wiring the pin to a local control circuit. The manual specifies that the zero‑set pulse must be at least 50 µs in duration and that the voltage must be within the supply range of the device. The reset pulse is also used for quick status checks. This pulse can be used to synchronize other devices in a distributed control system. The zero‑set feature is particularly useful in batch processing, where each cycle must start from a known state. It also simplifies maintenance procedures, as technicians can quickly verify that the timer has been cleared before re‑programming. Overall, the zero‑set value functionality enhances reliability and flexibility, making the H3CR series suitable for demanding industrial automation tasks.
Time Setting Rings for Consistent Settings
The H3CR series features dedicated time‑setting rings that provide a tactile and visual reference for all time parameters. Each ring is calibrated in 0.1‑second increments for the seconds dial, 1‑second increments for the minutes dial, and 1‑minute increments for the hours dial. The rings are engraved with a series of concentric circles that correspond to the digital display, allowing operators to verify settings without looking at the screen. This design reduces the likelihood of mis‑settings during rapid programming or in low‑visibility environments. The rings are positioned on the front panel in a standard layout: the seconds ring sits directly above the seconds display, the minutes ring above the minutes display, and the hours ring above the hours display. The rings are constructed from high‑temperature polycarbonate, which maintains dimensional stability up to 125 °C, ensuring accurate alignment over the device’s operational life. The rings also feature a recessed groove that accepts a small key or stylus, enabling precise adjustment without the need for a separate tool. In addition, the rings incorporate a non‑slip surface coating that improves grip during manual adjustment. The manual specifies that each ring can be rotated independently, and that the adjustment range is limited by a detent mechanism that prevents over‑rotation beyond the maximum setting. The detent is engineered to provide a firm click at each increment, giving the operator audible confirmation of the selected value. The rings are compatible with all H3CR variants, including the high‑current H3CR‑8S and the compact H3CR‑F models. When the device is powered on, the rings automatically display the current programmed time, allowing for quick status checks. The time‑setting rings are an essential feature for maintaining consistency in industrial automation, where precise timing is critical for process control, safety interlocks, and synchronization across multiple devices. Furthermore, the rings are designed to withstand repeated manual adjustments, with a rated torque of 0.5 Nm, ensuring longevity even in high‑cycle environments. The manual also recommends routine inspection of the rings for wear, as minor abrasion can affect the detent feel and lead to inadvertent mis‑settings. By integrating these robust rings, the H3CR series delivers a user‑friendly interface that balances precision, durability, and ease of use, making it suitable for a wide range of industrial applications. The rings are color‑coded to match the corresponding digital display segments: the seconds ring is silver, the minutes ring is gold, and the hours ring is blue. This color coding aids rapid identification and reduces operator fatigue. The manual also details that the rings can be calibrated during initial setup by rotating them to the desired value and then locking them in place with a small lever located on the side of the device. The lever engages a spring‑loaded latch that secures the ring position. When the device is reset, the rings retain their positions, ensuring that the programmed time is preserved across power cycles. Additionally, the rings are designed to be compatible with the optional panel cover, which can be installed without interfering with ring operation. The cover is available in matte black or brushed aluminum, providing both aesthetic flexibility and protection against dust and mechanical impact. All logged. Now
Panel Cover Options for Design Flexibility
The H3CR series provides a range of panel covers that allow designers to tailor the enclosure while meeting EN61812‑1 safety standards. Covers are offered in matte black, brushed aluminum, and transparent polycarbonate, each 3‑mm thick and impact‑resistant. The matte black finish reduces glare and is ideal for bright work areas; brushed aluminum offers a premium look and resists fingerprints and corrosion; transparent polycarbonate lets operators see internal LEDs without opening the case. All covers feature a standardized 50‑mm square mounting flange with four M4 screw holes, ensuring a secure fit on standard panel boards and simplifying installation. A recessed keyhole allows attachment of a small lock or key, adding security for sensitive applications. Metal covers act as a Faraday cage, shielding circuitry from external radio‑frequency interference; the polycarbonate option includes a conductive coating that provides similar protection; Custom color or branding options are available through laser‑etching or screen‑printing, enabling a cohesive visual identity across equipment. The manual supplies mounting hardware, torque specs (0.8 Nm), and a checklist for proper alignment before tightening. Covers meet EN50081‑2 and EN50082‑2 EMC requirements and IP65 dust and water resistance. These covers are available in single or dual‑panel configurations, giving designers layout options for control panels and ensuring seamless integration into existing systems. The covers are factory‑tested for reliability and come with a 5‑year warranty covering manufacturing defects!! Overall, the panel cover options combine durability, safety, and design flexibility, allowing engineers to select the enclosure that best matches the operational environment while preserving performance and compliance with international standards.
Timer Configurations and Types
The H3CR family offers a comprehensive suite of timer configurations, each designed to meet distinct process control requirements. The core types include the standard 24‑hour timer, the 48‑hour extended timer, the star‑delta timer for phase‑shifted operations, and the power‑OFF‑delay timer that allows a programmable delay after power removal. Each model can be configured in one of six operating modes: continuous, one‑shot, cycle, interval, countdown, and reverse countdown. The star‑delta timer is particularly useful in motor control applications where a phase shift is required; it can be set to any delay from 0.1 s to 10 s and supports up to 10 kHz switching. The power‑OFF‑delay timer provides a programmable delay from 0.5 s to 60 s, enabling safe shutdown sequences. The H3CR‑HRL, H3CR‑H8L, and H3CR‑H8RL variants incorporate a high‑resolution 1‑µs counter, allowing sub‑millisecond timing precision for advanced automation tasks. All timers feature the zero‑set value function that instantly resets the counter to zero, facilitating quick sequence checks. Time‑setting rings on the front panel limit the setting range to prevent accidental configuration beyond the rated limits, ensuring reliability. The manual details the wiring of input and output terminals, the use of PNP input models for compatibility, and the installation of panel‑mounted units with an 80‑mm socket length. By selecting the appropriate timer type and configuration, users can tailor the H3CR to a wide range of industrial applications while maintaining compliance with EN61812‑1, EN60664‑1, and EMC standards.
- Standard 24‑hour timer: Basic on/off control with 1‑minute resolution.
- 48‑hour extended timer: Supports up to 48 h cycles, ideal for long‑duration processes.
- Star‑delta timer: Phase‑shift control up to 10 kHz, adjustable delay 0.1 s–10 s.
- Power‑OFF‑delay timer: Programmable 0.5 s–60 s delay after power removal.
- H3CR‑HRL series: 1‑µs resolution, high‑speed counting for precision tasks.
- H3CR‑H8L series: 8‑bit counter with 1‑µs resolution, suitable for rapid sequences.
- H3CR‑H8RL series: 8‑bit counter with 1‑µs resolution and low‑power mode.
The H3CR manual provides detailed calibration procedures, safety precautions, and troubleshooting guidelines for each timer type, ensuring reliable operation in demanding industrial environments.
Accessories and Panel-Mounting Options
Panel‑mounted units fit sockets 80 mm or less. Optional covers allow design flexibility. PNP input models enable interface compatibility. Accessories include mounting brackets, cable glands, and extension cords. All components comply with EN61812‑1 and UL approvals. and safety.
Socket Length for Panel-Mounted Units
When installing an H3CR timer in a panel, the socket length is a critical factor that determines the overall footprint and compatibility with existing equipment. The manufacturer specifies a maximum socket length of 80 mm, which is designed to accommodate the compact housing of the H3CR series while still providing sufficient space for wiring and connector access. This limit ensures that the unit can be mounted in DIN rail or panel-mounting fully brackets without requiring custom modifications or additional spacing. The 80 mm dimension includes the entire front face of the timer, from the outermost edge of the mounting flange to the farthest point of the control panel interface. By adhering to this specification, installers can guarantee that the timer will fit within the allocated panel space, preventing clashes with adjacent devices or panel covers. In addition, the short socket length allows for a tight arrangement of multiple timers or other control components, which is especially useful in high-density control panels where space is at a premium. The design also facilitates easier cable management, as the reduced depth means that cable glands and strain reliefs can be positioned closer to the panel edge, minimizing cable length and reducing the risk of strain on the connections. For applications that require a longer socket, the manufacturer recommends using an extension bracket or a custom mounting solution, but this should be done only after verifying that the extended length will not interfere with other panel elements. Overall, the 80 mm socket length is a deliberate design choice that balances compactness with functional accessibility, ensuring that the H3CR timer can be seamlessly integrated into a wide range of panel configurations while maintaining compliance with safety and electrical standards.
PNP Input Models for Interface Compatibility
The H3CR series offers dedicated PNP input variants that enable seamless integration with industrial control systems requiring positive‑to‑negative logic; These models, identified by the suffix “‑PNP” in the part number, feature a 0–24 VDC input range and a maximum current rating of 100 mA, matching the standard I/O specifications of most PLCs and safety relays. The input circuitry incorporates a 10 kΩ pull‑up resistor and a 1 µF decoupling capacitor to suppress noise and ensure stable operation in electrically noisy environments. Because the PNP input is isolated from the timer’s internal power supply, it can be connected to a separate power source, providing additional safety and allowing the timer to operate in a “stand‑alone” mode when the main control power is interrupted. The PNP models also support the same six operating modes as the standard H3CR units, including star‑delta, power‑off‑delay, and instant‑output functions, making them fully interchangeable in most applications. Installation requires a simple 3‑wire connection: a positive supply, a common ground, and the signal line, which is internally connected to the timer’s input pin. The manufacturer recommends using shielded cables and proper grounding techniques to maintain signal integrity. With these features, the PNP input models expand the H3CR’s versatility, allowing designers to meet diverse interface requirements without compromising performance or safety.
In safety‑critical applications, the PNP input can be wired to a safety relay or a safety PLC that supplies a 24 VDC signal. The timer’s internal latch circuit ensures that a loss of signal is treated as a fault condition, triggering the configured safety output. This behavior aligns with IEC 61508 and ISO 13849 safety integrity levels, making the PNP variants suitable for use in machine guarding, emergency stop, and interlock systems. The input pins are protected by a 1 kΩ series resistor and a 0.1 µF ceramic capacitor to the ground, which limits surge currents and protects against electrostatic discharge. The PNP models also include a diagnostic LED that illuminates when the input is active, providing a quick visual check during commissioning. Finally, the part numbers for the PNP variants are listed as H3CR‑PNP‑8, H3CR‑PNP‑8S, and H3CR‑PNP‑8E, corresponding to the 8 V, 8S, and 8E power rating families. These models maintain the same mechanical dimensions as their non‑PNP counterparts, ensuring that they can be swapped without redesigning the panel layout.
PNP input models provide response and low latency for high‑speed fast applications
Precautions and Safety Guidelines
Before installation, verify that the supply voltage does not exceed the rated limits of the selected H3CR model. All connections must be made with insulated tools and the power must be disconnected during wiring. The device is not designed for direct exposure to water or corrosive environments; use a suitable enclosure if necessary. The H3CR has a maximum operating temperature of 70 °C; ensure adequate ventilation or active cooling in higher ambient conditions. Grounding is mandatory: connect the chassis to the earth ground through a low‑impedance path to prevent shock hazards. The input pins are protected by a 1 kΩ series resistor; do not exceed the maximum input current of 100 mA. When using the PNP input, ensure the signal source is isolated and that the common reference is correctly bonded to the device chassis. The timer’s internal latch will treat a loss of input signal as a fault; therefore, maintain a stable supply and signal to avoid unintended outputs. For safety‑critical applications, follow IEC 61508 and ISO 13849 guidelines, and consider using a safety relay or a safety PLC in conjunction with the H3CR. The device is UL, CSA, and VDE approved; however, local regulations may require additional certification. Do not modify the device’s casing or internal components, as this may void the warranty and compromise safety. Finally, keep the device free from dust and debris; use a clean, dry environment during operation. Regularly inspect all wiring and connectors for signs of wear or corrosion, and replace any damaged parts immediately. Failure to adhere to these precautions can result in electrical shock, fire, or equipment damage. Follow the user manual for maintenance.
Installation Guidelines and Wiring Instructions
Mounting the H3CR unit requires a 80 mm socket or a panel cover that accommodates the device’s dimensions. For panel‑mounted models, select a socket length of 80 mm or less to ensure a secure fit. The device can be powered from a supply that matches the model’s voltage rating (e.g., 230 V, 400 V, or 480 V). Connect the supply leads to the designated terminals, observing polarity and using insulated tools. The H3CR series offers PNP input models; when wiring the input, connect the signal source to the input pin and tie the common to the device chassis. The input line must be protected by a 1 kΩ series resistor and should not exceed 100 mA. Ground the chassis to earth to avoid shock hazards. Use a cable with a minimum 2 mm² cross‑section for power leads to reduce voltage drop. When installing in a cabinet, secure the unit with screws that match the mounting holes. Ensure that the enclosure is properly ventilated; the device’s operating temperature should not exceed 70 °C. If the unit is exposed to dust or moisture, use a sealed enclosure and apply conformal coating to the PCB. Verify that all connections are tight and that the device is isolated from other circuits to prevent interference. After wiring, perform a continuity test on the input and output terminals. Finally, set the desired operating mode using the time‑setting rings and confirm the configuration by checking the indicator LEDs. Follow the manufacturer’s safety instructions before powering the unit. Ensure that all wiring is labeled and that the device is isolated from other circuits. Test the output function to confirm proper operation. Maintain a log of installation details for future reference. Label all terminals clearly for safety additionally.
Maintenance and Troubleshooting Tips
Regular inspection of the H3CR unit is essential. Check the enclosure for cracks, corrosion, or loose screws. Verify that the panel cover is securely fastened and that the time‑setting rings are free of debris. Inspect power leads for insulation damage and ensure the cable is not pinched or frayed. If mounted in a cabinet, confirm adequate ventilation and that ambient temperature stays below 70 °C. For PNP input models, inspect input terminals for oxidation and clean with a lint‑free cloth and isopropyl alcohol if necessary. Also, inspect the mounting screws for tightness and replace any that show wear.
When troubleshooting, confirm that the power supply is within the rated voltage range and that the supply leads are correctly connected. Use a multimeter to check continuity between the supply terminals and the device chassis. If the device does not respond to a power‑on signal, verify the input signal and the series resistor. Check output terminals for correct voltage or current as specified. If the timer fails to start or stop at the programmed time, inspect the time‑setting rings for proper alignment and ensure the zero‑set value function is configured. For star‑delta or power‑off‑delay timers, confirm that the internal relay contacts are not stuck. If the device shows erratic behavior, examine EMC compliance by ensuring the device is not too close to high‑frequency equipment.
Routine maintenance includes cleaning the PCB with a soft brush and compressed air to remove dust. Replace worn or damaged components such as the timing capacitor or resistor with parts that match the specified tolerance. Keep a log of maintenance activities, noting the date, actions, and any anomalies. If the device continues to malfunction, contact the manufacturer’s support team for diagnostics or a replacement unit. Always follow safety guidelines before performing any maintenance or troubleshooting tasks; Check.