Omron H3CR-A8 Timer Instruction Manual

Introduction

This manual provides detailed instructions for the safe and efficient use of the Omron H3CR-A8 Timer. This industrial timer offers precise timing control for various applications, featuring a wide timing range and versatile voltage compatibility. Please read this manual thoroughly before installation and operation, and retain it for future reference.

Safety Information

To ensure safe operation and prevent damage to the product or injury to personnel, observe the following safety precautions:

• Always disconnect all power sources before installing, wiring, or performing maintenance on the timer.
• Installation and wiring should only be performed by qualified electrical personnel in accordance with local and national electrical codes.
• Do not operate the timer beyond its specified voltage and current ratings.
• Avoid installing the timer in locations subject to excessive vibration, shock, high humidity, corrosive gases, or direct sunlight.
• Ensure proper grounding to prevent electrical shock.

Product Overview

The Omron H3CR-A8 is a multi-functional solid-state timer designed for industrial control systems. It features a DPDT (Double Pole Double Throw) output and supports a broad range of AC and DC input voltages, making it suitable for diverse timing applications.

Figure 1: Front and bottom view of the Omron H3CR-A8 timer, displaying its model number, timing range (0.05s to 300h), and voltage specifications (24-240VAC, 24-240VDC). The integrated wiring diagram for the 8-pin configuration is visible.

Figure 2: Side view of the Omron H3CR-A8 timer, showing additional electrical specifications, certifications (CE, UL, C-UL), and contact ratings.

Specifications

Setup and Installation

The H3CR-A8 timer is designed for panel mounting using a compatible 8-pin socket (sold separately). Ensure all power is disconnected from the circuit before proceeding with installation.

Wiring Diagram

Refer to the diagram below for proper wiring connections. Incorrect wiring can lead to malfunction or damage.

Figure 3: Detailed wiring diagram for the Omron H3CR-A8 timer, showing pin assignments for power input and DPDT contact outputs.

Pin Assignments:

• Source (Power Input): Connect the power supply (24-240VAC or 24-240VDC) to pins 2 and 7.
• Contact 1 (Pole 1):
  • Common: Pin 8
  • Normally Closed (NC): Pin 5
  • Normally Open (NO): Pin 6
• Contact 2 (Pole 2):
  • Common: Pin 1
  • Normally Closed (NC): Pin 4
  • Normally Open (NO): Pin 3

Figure 4: Bottom view of the Omron H3CR-A8 timer, illustrating the physical layout of the 8 pins for socket connection.

Installation Steps:

1. Mount the compatible 8-pin socket securely in the desired location.
2. Wire the power supply and load circuits to the socket terminals according to the wiring diagram (Figure 3).
3. Carefully insert the H3CR-A8 timer into the wired socket, ensuring all pins align correctly.
4. Verify all connections are secure and correct before applying power.

Operating Instructions

The Omron H3CR-A8 timer typically features rotary switches or dials on its front panel for setting timing parameters.

Setting the Time Range:

Locate the time range selector switch (often labeled with units like 's', 'm', 'h' and multipliers like 'x1', 'x10', 'x100'). Rotate this switch to select the desired base time unit and multiplier. For example, to set a time of 50 minutes, you might select 'm' (minutes) and a 'x10' multiplier, then set the time value to 5.

Setting the Time Value:

After selecting the time range, use the precision dial or knob (often labeled with numerical values) to set the specific time value within that range. The timer will count down from this set value once activated.

Operation:

1. Apply power to the timer (pins 2 and 7).
2. The timer will begin its timing cycle according to the selected mode (e.g., ON-delay, OFF-delay, interval). Refer to the specific mode settings on your timer if applicable.
3. Upon completion of the timing cycle, the DPDT output contacts will switch state.
4. The timer typically has an indicator LED to show power status and timing operation.

Maintenance

The Omron H3CR-A8 timer is designed for long-term, reliable operation with minimal maintenance. However, periodic checks can help ensure optimal performance:

• Cleaning: Keep the timer's exterior clean and free from dust and debris. Use a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Connection Inspection: Periodically inspect wiring connections to ensure they remain tight and free from corrosion.
• Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges.
• Visual Inspection: Check for any signs of physical damage, discoloration, or overheating.

Troubleshooting

If the timer does not operate as expected, consider the following common issues and solutions:

• Timer Not Powering On:
  • Verify that the power supply is connected correctly to pins 2 and 7.
  • Check the input voltage against the timer's specifications (24-240VAC/VDC).
  • Ensure the power source is active.
• Timer Not Timing:
  • Confirm the time range and time value settings are correctly configured.
  • Check if the timer is receiving the appropriate trigger signal for its operating mode (if applicable).
• Output Contacts Not Switching:
  • Ensure the timing cycle has completed.
  • Verify the load connections to the output pins (1, 3, 4, 5, 6, 8) are correct.
  • Check the load current does not exceed the contact rating (5A).
• Erratic Operation:
  • Inspect for loose wiring connections.
  • Check for electromagnetic interference (EMI) from nearby equipment. Consider shielding or relocating the timer if necessary.

If problems persist, contact Omron technical support.

Warranty and Support

Omron products are manufactured to high-quality standards and are typically covered by a limited warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation included with your purchase or visit the official Omron website.

For technical assistance, troubleshooting guidance beyond this manual, or to inquire about repairs, please contact Omron customer service. When contacting support, have your product model number (H3CR-A8) and purchase information readily available.

You can find more information and support resources on the Omron Store on Amazon.