ORNO PRE-450 Astronomical Time Programmer User Manual

1. Introduction

This manual provides detailed instructions for the installation, setup, programming, and operation of the ORNO PRE-450 Astronomical Time Programmer. This digital timer is designed for DIN rail mounting and offers advanced scheduling capabilities, including astronomical functions, to control various electrical devices.

2. Safety Information

Please read this section carefully before installation and operation to ensure safe use and prevent damage to the device or injury. Installation should only be performed by a qualified electrician.

• Disconnect power before installation or maintenance.
• Ensure the supply voltage matches the device specifications (24-264V AC/DC).
• Do not exceed the maximum current rating of 16A.
• Protect the device from moisture and extreme temperatures outside the operating range (-20°C to +55°C).
• The device is designed for indoor use and DIN rail mounting.

3. Product Overview and Features

The ORNO PRE-450 is a versatile digital time programmer equipped with an astronomical clock function. It automatically calculates sunrise and sunset times based on geographical location and time zone, allowing for precise control of connected devices.

Key Features:

• Astronomical Function: Automatically adjusts switching times based on sunrise and sunset.
• Multiple Program Types: Supports weekly, annual, and astronomical programming.
• 52 Switching Points: Allows for flexible and detailed scheduling.
• Integrated Battery: Maintains clock settings and program memory for up to 10 years during power outages.
• Operating Modes: Manual, Automatic, Holiday, and Random modes.
• Night Pause Function: Define periods when the device remains off, even during astronomical ON times.
• Countdown Function: For temporary switching operations.
• Multi-language Menu: Available in 3 languages.
• DIN Rail Mounting: Easy integration into electrical panels.

Figure 1: Front view of the ORNO PRE-450 Astronomical Time Programmer, showing the digital display and control buttons.

4. Installation

The ORNO PRE-450 is designed for mounting on a standard DIN rail (TH-35mm). It occupies two DIN modules in width.

Installation Steps:

1. Power Disconnection: Ensure the main power supply to the installation area is completely disconnected before proceeding.
2. Mounting: Clip the device onto the DIN rail.
3. Wiring: Connect the power supply and load according to the wiring diagram provided on the device and below. Ensure all connections are secure.
4. Power Reconnection: Once all connections are verified, restore power to the installation.

Figure 2: Side view of the ORNO PRE-450, illustrating the wiring diagram for connecting power (N, L) and the relay output (18, 15, 16, A2).

Wiring Details:

• A1/A2: Power supply input (24-264V AC/DC).
• 18, 15, 16: Relay output contacts. 15 is common, 18 is normally open (NO), 16 is normally closed (NC).

5. Initial Setup

Upon initial power-up or after a prolonged power outage, you may need to set the basic parameters.

5.1. Language Selection

1. Press the MENU button.
2. Navigate to the Language setting using the arrow buttons (▲ / ▼).
3. Press OK to select.
4. Choose your desired language (e.g., English) and press OK to confirm.

5.2. Date and Time Setting

1. From the main menu, navigate to "Time/Date" or similar.
2. Use the arrow buttons to adjust the year, month, day, hour, and minute.
3. Press OK after each adjustment to confirm and move to the next field.
4. The device supports automatic summer/winter time switching. Ensure this setting is enabled if desired.

5.3. Astronomical Settings (Geographical Coordinates)

For the astronomical function to work correctly, you must input your geographical coordinates (latitude and longitude) and time zone.

1. Navigate to the "Astronomical" or "Location" settings in the menu.
2. Enter the latitude and longitude of your location. These can be found using online maps or GPS services.
3. Set the correct time zone offset (e.g., +1 for Central European Time).
4. Confirm settings with OK.

6. Operating Modes

The ORNO PRE-450 offers several operating modes to suit different needs:

• Automatic Mode: The device operates according to the programmed schedules (weekly, annual, astronomical). This is the standard operating mode.
• Manual Mode: Allows you to manually switch the output ON or OFF, overriding any active programs. This is typically for temporary control.
• Holiday Mode: Suspends all regular programs for a specified period, useful for vacations or extended absences.
• Random Mode: Introduces random variations to programmed ON/OFF times, often used for presence simulation.

To switch between modes, access the "Operating Mode" option in the main menu and select the desired mode using the arrow and OK buttons.

7. Programming Schedules

The device supports up to 52 switching points across various program types.

7.1. Astronomical Program

This program type uses the calculated sunrise and sunset times. You can set an offset (e.g., turn on 15 minutes before sunset or turn off 30 minutes after sunrise).

1. Go to "Programs" in the menu and select "Astronomical".
2. Choose to set an ON or OFF event.
3. Select "Sunrise" or "Sunset" as the trigger.
4. Set an optional offset in minutes (e.g., -15 for 15 minutes before, +30 for 30 minutes after).
5. Specify the days of the week for this program to be active.
6. Confirm with OK.

7.2. Weekly/Annual Programs

These programs allow you to set specific ON/OFF times for particular days of the week or dates of the year.

1. Go to "Programs" and select "Weekly" or "Annual".
2. Choose an empty program slot.
3. Set the desired ON time (hour and minute).
4. Set the desired OFF time (hour and minute).
5. For weekly programs, select the days of the week. For annual programs, select the specific date(s).
6. Confirm with OK.

7.3. Night Pause Function

The night pause function allows you to define a period during which the output will remain OFF, overriding any ON commands from other programs, typically used during nighttime hours.

1. Navigate to "Night Pause" in the menu.
2. Set the start time for the pause.
3. Set the end time for the pause.
4. Enable the night pause function.
5. Confirm with OK.

8. Maintenance

The ORNO PRE-450 is designed for maintenance-free operation. However, periodic checks are recommended.

• Ensure the device is free from dust and debris.
• Verify that all wiring connections remain secure.
• The internal battery (CR2450) has a lifespan of approximately 10 years for memory backup. If the device frequently loses time or program settings after power outages, the battery may need replacement by a qualified technician.

9. Troubleshooting

10. Technical Specifications

Figure 3: Dimensional drawing of the ORNO PRE-450, indicating key measurements for installation.

11. Warranty and Support

For warranty information, please refer to the terms and conditions provided at the point of purchase. For technical support or further assistance, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.

Manufacturer: ORNO