Eltako S2U12DDX-UC Programmable Clock User Manual

1. Safety Information

WARNING: Electrotechnical work must be performed exclusively by specialized electricians or under their direct supervision and guidance. Improper installation or handling can lead to serious injury or damage.

Always disconnect power before installation, maintenance, or any work on the device. Ensure all local and national electrical codes are followed.

2. Product Overview

The Eltako S2U12DDX-UC is a 2-channel programmable clock designed for DIN rail mounting. It features two potential-free contacts (1+1) rated at 16 A/250 V AC. This device supports LED lamps up to 600 W and incandescent bulbs up to 2000 W. It includes an Astro function for automatic switching based on sunrise/sunset, an illuminated display, and a power reserve of approximately 7 days without battery.

Thanks to patented Eltako-Duplex (DX) technology, the normally potential-free contacts can switch 230 V AC 50 Hz, significantly reducing wear. This is achieved by connecting the N conductor to terminal (N) and L to 1 (L) and/or 3 (L), resulting in an additional standby loss of only 0.1 W. The use of bistable relays eliminates coil power loss and heating when switched on.

Up to 60 memory locations are freely assignable across the channels. The device includes automatic date and summer/winter time changes.

Key Features:

• Installation: DIN rail mounting
• Number of Channels: 2
• Supply Voltage: 8-230 V AC/DC
• Power Reserve: Approximately 480 hours (7 days)
• Contacts: 1+1 potential-free contacts, 16 A/250 V AC
• Load Capacity: 230 V LED lamps up to 600 W, incandescent bulbs up to 2000 W
• Functions: Astro function, date, automatic summer/winter time change, centralized control, random mode
• Memory: Up to 60 freely assignable memory locations
• Display: Illuminated screen

Figure 1: Eltako S2U12DDX-UC Programmable Clock. This image shows the compact design of the device, suitable for DIN rail installation, with its display and control buttons visible on the front panel.

3. Setup

3.1. Installation

The Eltako S2U12DDX-UC is designed for DIN EN 60715 TH35 support rail mounting. It occupies 1 division unit (18 mm wide, 58 mm deep).

1. Ensure power is disconnected at the main circuit breaker before installation.
2. Mount the device onto a standard DIN rail.
3. Connect the N conductor to the (N) terminal.
4. Connect the L conductor to 1 (L) and/or 3 (L) for the respective channels.
5. For centralized control, connect the control input (+A1) for central ON or OFF with priority. The supply and control voltage for central control is 8 to 230 V UC.
6. Verify all connections are secure and correct before restoring power.

3.2. Initial Configuration - Language Setting

After applying power for the first time, the language selection menu will appear.

1. Within 10 seconds of applying power, use the SET button to select the desired language (D=German, GB=English, F=French, IT=Italian, ES=Spanish).
2. Confirm your selection with the MODE button.
3. The display will then show the normal view: weekday, time, day, and month.

Note on Speed: Parameters increase rapidly when the SET button is pressed and held. Release and press again for longer to change direction.

4. Operating Instructions

4.1. Setting the Time

1. Press MODE.
2. In the PRG (program) menu, use SET to find the UHR (time) function.
3. Select UHR with MODE.
4. For 'S' (hours), use SET to adjust the hour and confirm with MODE.
5. Proceed similarly for 'M' (minutes).

4.2. Setting the Date

1. Press MODE.
2. Use SET to find the DAT (date) function.
3. Select DAT with MODE.
4. For 'J' (year), use SET to choose the year and confirm with MODE.
5. Proceed similarly for 'M' (month) and 'T' (day).
6. Finally, 'MO' (weekday) will flash. Adjust with SET and confirm with MODE.

4.3. Setting the Location (for Astro Function)

A list of German cities can be found in the full user manual for location settings.

1. Press MODE.
2. Use SET to find the POS (position) function.
3. Select POS with MODE.
4. For 'BRT' (latitude), use SET to choose the latitude and confirm with MODE.
5. Similarly, select longitude for 'LAE' and confirm with MODE.
6. Now, for 'GMT', select the time zone and confirm with MODE.
7. Optionally, for both channels, a time shift of up to ±2 hours can be entered for WSW (winter solstice) and SSW (summer solstice).

4.4. Manual ON or OFF Switching with Priority

1. Press MODE.
2. In the PRG menu, use SET to find the INT (interrupt) function.
3. Select INT with MODE.
4. For 'KNL' (channel), use SET to select channel 1 or 2 and confirm with MODE.
5. You can now switch between AUT (automatic), ON, or OFF.
6. After confirming with MODE, the selected channel's switching position will be applied.
7. To allow the switching state to change automatically when a time program is active, select AUT.
8. If MODE is held for more than 2 seconds during any confirmation, the change is saved, and the normal display appears.

4.5. Summer/Winter Time Change

1. Press MODE.
2. Use SET to find the SWZ (summer/winter time) function.
3. Select SWZ with MODE.
4. Switch between ON and OFF with SET and confirm with MODE. If ON is selected, the change occurs automatically.

4.6. Centralized Control ON or OFF with Priority (in Automatic Mode)

1. Press MODE.
2. Use SET to find the ZEA (central control) function.
3. Select ZEA with MODE.
4. You can now switch between ZE (central ON) and ZA (central OFF) with SET and confirm with MODE.

4.7. Activating/Deactivating Random Mode

1. Press MODE.
2. Use SET to find the ZUF (random) function.
3. Select ZUF with MODE.
4. Set to ON (ZUF+) or OFF (ZUF) with SET and confirm with MODE.
5. When random mode is active, all switching points for all channels are randomly shifted by up to 15 minutes (earlier ON times, later OFF times).

4.8. Entering Timer Programs

Detailed instructions for entering timer programs are provided in the comprehensive user manual. Each memory location can be used with the Astro function (automatic switching after sunrise or sunset), ON/OFF times, or a pulse switching time (triggers a 2-second pulse). The Astro ON/OFF time can be shifted by ±2 hours. Additionally, a time shift of up to ±2 hours can be entered for solstices.

4.9. Activating/Deactivating Key Lock

1. To Activate: Briefly press MODE and SET simultaneously. Lock with SET for 'LCK'. This is indicated by an arrow next to the lock icon.
2. To Deactivate: Press MODE and SET simultaneously for 2 seconds. Unlock with SET for 'UNL'.

5. Maintenance

The Eltako S2U12DDX-UC programmable clock is designed for long-term, maintenance-free operation. No specific user maintenance is required. For cleaning, use a dry, soft cloth. Do not use abrasive cleaners or solvents.

6. Troubleshooting

If the device does not function as expected, review the programming steps in Section 4. Ensure all connections are secure and power supply is stable.

• Display not illuminated: Check power supply. Press MODE or SET to activate backlight.
• Incorrect switching times: Verify time, date, and location settings. Check individual program entries.
• Keypad unresponsive: Check if key lock is active (Section 4.9).
• General malfunction: Disconnect power for a few minutes, then reconnect. If issues persist, contact Eltako customer support.

7. Specifications

8. Warranty and Support

For warranty information and technical support, please contact Eltako directly or refer to their official website. Details regarding spare parts availability are typically provided for 1 year from the date of purchase.