CBBEXP PNOZ 1 24VDC 775695 Safety Relay User Manual

1. Introduction

This manual provides essential information for the safe and efficient installation, operation, and maintenance of the CBBEXP PNOZ 1 24VDC 775695 Safety Relay. Please read this manual thoroughly before attempting to install or operate the device. Retain this manual for future reference.

2. Safety Information

WARNING: Improper installation or operation of this safety relay can result in serious injury or death. Only qualified personnel should install, operate, or maintain this device.

• Always disconnect power before performing any installation, wiring, or maintenance.
• Adhere to all local, national, and international safety regulations and standards.
• Ensure all wiring connections are secure and correct according to the wiring diagrams.
• Do not bypass or tamper with safety functions.
• Regularly inspect the device for damage or malfunction.

3. Product Overview

The CBBEXP PNOZ 1 24VDC 775695 is a safety relay designed to monitor safety functions in industrial applications. It operates on a 24VDC power supply and is typically used in emergency stop circuits, safety gate monitoring, and light curtain applications to ensure machine safety.

Figure 1: Front view of the CBBEXP PNOZ 1 24VDC 775695 Safety Relay. This image shows the compact housing and terminal block connections.

4. Setup

4.1 Mounting

The PNOZ 1 24VDC 775695 safety relay is designed for DIN rail mounting. Ensure the mounting location is free from excessive vibration, moisture, and extreme temperatures. Allow adequate space for ventilation and wiring.

1. Securely attach the DIN rail to a stable surface within the control cabinet.
2. Clip the safety relay onto the DIN rail until it locks into place.
3. Verify that the relay is firmly seated and cannot be easily dislodged.

4.2 Wiring

Refer to the wiring diagram provided with your specific application documentation. The following is a general guide:

• Power Supply: Connect the 24VDC power supply to the designated terminals (e.g., A1 and A2). Ensure correct polarity.
• Input Circuit: Connect the safety input devices (e.g., emergency stop buttons, safety gate switches) to the input terminals. These inputs typically monitor the status of safety components.
• Output Circuit: Connect the safety relay's output contacts to the control circuit of the machinery. These outputs are typically used to remove power from hazardous machine movements when a safety function is activated.
• Feedback Loop: If applicable, connect the feedback loop to monitor the status of external contactors or relays.

IMPORTANT: All wiring must comply with relevant electrical codes and safety standards. Use appropriate wire gauges and terminal torque settings.

4.3 Initial Power-Up

1. Double-check all wiring connections for correctness and security.
2. Ensure all safety devices in the circuit are in their safe state (e.g., emergency stop released, safety gates closed).
3. Apply 24VDC power to the relay.
4. Observe the status indicators on the relay. Refer to the operating instructions for expected indicator behavior.

5. Operating Instructions

The PNOZ 1 24VDC 775695 safety relay continuously monitors the connected safety circuits. Its operation is largely automatic once correctly installed and configured.

5.1 Status Indicators

The relay typically features LED indicators to display its operational status. Common indicators include:

• Power LED: Illuminates when the 24VDC power supply is connected.
• Input Status LEDs: Indicate the status of the safety inputs (e.g., ON when inputs are closed, OFF when open).
• Output Status LED: Illuminates when the safety outputs are active (contacts closed).
• Fault LED: Illuminates or flashes to indicate a fault condition within the safety circuit or the relay itself.

Consult the specific product datasheet for a detailed explanation of each indicator's behavior.

5.2 Resetting the Relay

After a safety function has been activated (e.g., emergency stop pressed) and the hazard has been cleared, the safety relay may require a manual or automatic reset to re-enable the machine's operation. The reset method depends on the relay's configuration and the application's requirements.

• Manual Reset: Press a designated reset button connected to the relay's reset input.
• Automatic Reset: The relay automatically resets once the safety inputs are restored to their safe state. This is less common for critical safety functions.

Ensure the cause of the safety activation is resolved before resetting the relay.

6. Maintenance

The CBBEXP PNOZ 1 24VDC 775695 safety relay is designed for long-term, reliable operation with minimal maintenance. However, periodic checks are recommended.

• Visual Inspection: Regularly inspect the relay for any signs of physical damage, discoloration, or loose connections.
• Functionality Check: Periodically test the safety circuit by activating the connected safety devices (e.g., pressing the E-stop, opening a safety gate) to ensure the relay responds correctly.
• Cleaning: If necessary, gently clean the exterior of the relay with a dry, soft cloth. Do not use solvents or abrasive cleaners.

There are no user-serviceable parts inside the relay. Do not attempt to open or repair the device.

7. Troubleshooting

If the safety relay is not functioning as expected, perform the following basic troubleshooting steps:

If troubleshooting steps do not resolve the issue, contact technical support.

8. Specifications

9. Warranty and Support

This CBBEXP PNOZ 1 24VDC 775695 Safety Relay comes with a 1-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.

For technical support, warranty claims, or further assistance, please contact your supplier or the manufacturer, CBBEXP. Provide the model number (775695) and purchase details when contacting support.