1. Introduction
The Eltako MFZ12NP-230V+UC is a versatile multifunction time relay designed for various control applications in electrical systems. This device offers a wide time range from 0.1 seconds to 40 hours and features 1 normally open (NO) contact. Its compact design and DIN rail mounting capability make it suitable for integration into standard electrical enclosures. This manual provides essential information for the safe and effective installation, operation, and maintenance of your Eltako time relay.
2. Safety Instructions
- Electrical Hazard: Installation and maintenance must only be performed by qualified electricians.
- Power Disconnection: Always disconnect power to the circuit before installing, wiring, or servicing the device.
- Voltage Compatibility: Ensure the supply voltage matches the device's specifications (230V).
- Proper Wiring: Follow all wiring diagrams and local electrical codes. Incorrect wiring can lead to damage, fire, or electric shock.
- Environmental Conditions: Do not expose the device to moisture, extreme temperatures, or corrosive environments.
3. Product Overview
The Eltako MFZ12NP-230V+UC is a compact, blue polycarbonate time relay designed for DIN rail mounting. It features multiple selectable functions and adjustable time ranges, making it adaptable for various timing tasks. The front panel includes rotary switches for setting the desired function and time delay.
Figure 3.1: Front View of the Time Relay. This image displays the front of the Eltako MFZ12NP-230V+UC relay, highlighting the two rotary dials used for selecting the operating function and setting the time range. Visible terminal labels indicate connection points.
Figure 3.2: Side View with Wiring Diagrams. This image shows the side of the Eltako MFZ12NP-230V+UC relay, where essential wiring diagrams for 230V connections are printed. These diagrams are crucial for correct installation.
Figure 3.3: Size Comparison. The relay is shown held in a hand, providing a clear visual reference for its compact dimensions and suitability for space-constrained installations.
4. Setup and Installation
The MFZ12NP-230V+UC is designed for DIN rail mounting. Ensure the power supply is disconnected before proceeding with installation.
4.1 Mounting
- Locate a suitable position on a standard DIN rail within your electrical enclosure.
- Hook the top edge of the relay onto the DIN rail.
- Press the bottom edge of the relay firmly until it clicks into place on the rail.
4.2 Wiring
Refer to the wiring diagrams printed on the side of the device (Figure 3.2) and the specific application requirements. A typical connection involves:
- L (Line): Connect the phase conductor (230V AC).
- N (Neutral): Connect the neutral conductor.
- A1: Control input for triggering the timing function.
- C1, C2: Common terminals for the switching contact.
- 1, 3: Normally Open (NO) contact terminals. Connect your load between C1/C2 and 1/3, depending on the specific wiring diagram for your chosen function.
Warning: Ensure all connections are secure and correctly insulated. Incorrect wiring can cause device malfunction or electrical hazards.
5. Operating Instructions
The Eltako MFZ12NP-230V+UC offers 10 different operating functions and a wide range of adjustable time delays. These are set using the two rotary switches on the front panel.
5.1 Function Selection
The upper rotary switch (labeled 'F' or similar) allows you to select one of the 10 available multifunction modes. Each mode corresponds to a specific timing behavior (e.g., ON delay, OFF delay, flashing, pulse generation). Consult the device's technical documentation or the markings on the relay for a detailed explanation of each function.
5.2 Time Range and Delay Setting
The lower rotary switch (labeled 'T' or similar) is used to set the desired time delay. This switch typically has two parts:
- Time Range Selector: Choose the overall time range (e.g., 0.1s-1s, 1s-10s, 1min-10min, 1h-10h, up to 40h).
- Fine Adjustment: Within the selected range, use the smaller dial to precisely set the time delay.
After setting the function and time, apply power to the circuit. The relay will operate according to the selected parameters.
6. Maintenance
The Eltako MFZ12NP-230V+UC time relay is designed for long-term, maintenance-free operation under normal conditions. However, periodic inspection is recommended.
- Cleaning: If necessary, gently clean the exterior of the device with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Connection Check: Periodically inspect wiring connections to ensure they remain tight and free from corrosion.
- Environmental Check: Ensure the operating environment remains within specified temperature and humidity limits.
- Damage Inspection: Check for any signs of physical damage, discoloration, or overheating. If any damage is observed, disconnect power immediately and replace the device.
7. Troubleshooting
If the time relay is not functioning as expected, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on / No output | No power supply; Incorrect wiring; Blown fuse/tripped breaker | Check power supply; Verify wiring against diagram; Check and reset circuit protection. |
| Timing is incorrect or inconsistent | Incorrect time range setting; Incorrect fine adjustment; Incorrect function selected | Adjust time range and fine-tune the delay; Verify the selected function matches the desired operation. |
| Output contact does not switch | Incorrect wiring of load; Overloaded contact; Device malfunction | Check load wiring; Ensure load current does not exceed 16A/250V; If problem persists, replace device. |
| Device feels hot | Overload; Poor ventilation; Internal fault | Reduce load; Ensure adequate ventilation in enclosure; Disconnect power and replace device if overheating continues. |
If troubleshooting steps do not resolve the issue, contact Eltako customer support or a qualified electrician.
8. Specifications
| Brand | Eltako |
| Model Number | MFZ12NP-230V+UC (Item Model Number: 1475168) |
| Input Voltage | 230V AC |
| Time Range | 0.1 seconds - 40 hours |
| Number of Functions | 10 (Multifunction) |
| Contact Type | 1 Normally Open (NO) contact |
| Switching Capacity | 16A / 250V |
| Mounting Type | DIN Rail Mounting |
| Material | Polycarbonate |
| Color | Blue |
| Product Dimensions (L x W x H) | 9 x 7 x 2 cm (approximate) |
| Package Quantity | 1 |
| Batteries Required | No |
| Spare Parts Availability | 1 Year |
9. Warranty Information
Eltako products are manufactured to high-quality standards. This product typically comes with a manufacturer's warranty against defects in materials and workmanship. Please refer to the specific warranty terms provided with your purchase or visit the official Eltako website for detailed information regarding warranty duration and conditions. Spare parts are generally available for a period of 1 year from the date of purchase.
10. Support & Contact
For technical assistance, product inquiries, or warranty claims, please contact your local Eltako distributor or visit the official Eltako website:
- Eltako GmbH
- Hofener Straße 54
- 70736 Fellbach, Germany
- Website: www.eltako.com
When contacting support, please have your product model number (MFZ12NP-230V+UC) and purchase details readily available.
