2948 - Switch BERKER - Free user manual and instructions

Product type	Timed switch (timer) for lighting
Brand	Berker
Model	2948
Rated voltage	AC 230 V, 50 Hz
Max power (incandescent lamp)	1000 W
Max power (high voltage halogen)	1000 W
Max power (low voltage halogen with TRONIC transformer)	750 W
Max power (low voltage halogen with conventional transformer)	750 VA (min. load 85%)
Max power (fluorescent without compensation)	500 VA
Max power (fluorescent with parallel compensation)	400 VA
Max power (fluorescent duo)	1000 VA
Relay output type	1 potential-free normally open contact
Number of terminals	6 screw terminals + adapter connector
Max conductor cross-section	2.5 mm² or 2 x 1.5 mm²
Max circuit breaker	16 A
Mounting	Flush-mounted in 60 mm box (recommended depth)
Functions	Timer with time delay, optional twilight detector, two mechanical secondary controls
Applications	Automatic lighting switching
Safety	Installation by a qualified electrician; not suitable for disconnection from mains supply
Warranty	Legal compliance (return to customer service with defect description)

Frequently Asked Questions - 2948 BERKER

How to connect the twilight detector?

The detector cable connects to the three-pole terminal in the insert. For installation under plaster, use a J-Y(ST)Y 2x0.6 mm cable. The marked conductor is the ground. Follow the provided connection diagram.

Can I use LED lamps with this device?

The device is designed for incandescent, halogen, and fluorescent lamps. For LEDs, check their compatibility with a dimmer or contact the manufacturer.

What is the maximum power for fluorescent lamps?

Without compensation: 500 VA. With parallel compensation: 400 VA. In duo configuration: 1000 VA.

How to connect a secondary control?

The device accepts two mechanical secondary controls (normally open contact). Connect them to the designated terminals (see diagram) following the 2-wire principle.

What to do if the timer does not light up?

Check the supply voltage (230 V, 50 Hz) and wiring. Ensure the adapter is properly engaged. Consult the connection diagram.

Can I use this device for electric heaters?

No, the device is exclusively designed for lighting switching. Using it for heaters is dangerous; the user must take additional safety measures.

How to adjust the time delay?

The time delay is adjusted via the timer adapter (separate manual). The insert 2948 does not have built-in adjustment.

What cable cross-section to use for connection?

The terminals accept up to 2.5 mm² or 2 x 1.5 mm². Use cables suitable for the installation (minimum cross-section 1.5 mm² recommended).

Can the twilight detector be tested?

Yes, by simulating darkness. The detector switches when the brightness falls below the set threshold. Check the wiring if the behavior is abnormal.

Is the device compatible with a dimmer?

No, the insert 2948 is a timed switch and must not be used with a dimmer. Use it only with mechanical controls.

USER MANUAL 2948 BERKER

Operating Instructions

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1. Warning 10
2. Installation Instructions 12
3. Connection 14
4. Acceptance of guarantee 17

1. Warning

Caution! The installation and assembly of electrical equipment may only be

performed by a skilled electrician. Not suitable for disconnecting.

This timer has been designed for the automatic switching of lights. If they are used for any other purposes which may entail hazards (e.g. switching heaters) such hazards will have to be eliminated by the user by taking additional suitable safety measures.

2. Function

This Timer-insert is a system component to be installed into a 60 mm flush box (recommendation: doop box) in conjunction with the timer attachment with time switch function.

The device facilitates the programmed, time-controlled switching of various lighting fittings (please refer to Specifications). Due to the use of an efficient relay with potential-free contacts, consumers of up to a maximum of 1000 W can be switched.

Via two separate extension inputs, the consumer can be switched by a mechanical push-button (two-key principle, 2x n. o. contacts).

The Timer-insert has six connecting terminals and one plug connector for contact with the attachment.

In addition, a three-pole terminal (added to the attachment) can be positioned in the insert. This terminal serves for connecting a twilight sensor.

A

B

3. Installation Instructions

Important: The sensor line carries protective low voltage (SELV). Please observe the installation procedures as specified by VDE 0100.

Connecting the Sensor:

Buried Wiring (Figure A):

Choose suitable cable for buried installation of the sensor line.

Recommendation: J-Y(ST)Y 2x2x0.6 mm telephone cable. The individual wires of the sensor line should be put through flexible insulating tubing (added to the attachments with sensor evaluation). Then, together with the flexible insulating tubing, push the line through entrance 0 of the insert and through duct 0 to terminal 0.

The insulating tubing must cover the individual wires from the cable sheath to the connecting terminal. Put the connecting terminal (added to the attachments with sensor evaluation) in the insert as shown in the illustration.

Surface Wiring (Figure B):

Lead sensor line ① behind the supporting plate (between the wall and the supporting plate) through opening ② into duct ③ of the insert. The line must be led directly through the duct to connecting terminal ④. The line must be precisely in the duct and must not form any loops towards the 230 V connecting terminal space.

Connect the sensor line as shown in the opposite illustration.

Wire marking:

Sensor: 'Earth' = marked.

Adapter, extension line:

'Twilight' = marked.

'Earth' = middle wire.

The Timer-insert can only be used in conjunction with the Timer attachment with time switch function.

Timer-insert © is provided for installation in a 60 mm flush box

(recommendation: deep box).

The connecting terminals of the insert must be down.

Plug attachment ② onto the insert together with frame ③.

Electrical contacting is established through plug (9) and 30.

(For the description, installation and connection of the attachment, please refer to separate instructions.)

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1. Timer insert Connection

Connect phase L with the relay input ('jumper').

Two-phase connection

The timer insert is provided with potential-free contacts.

Connection with mechanical extension

Connect phase L with the relay input ('jumper')

5. Specifications

Rated voltage :230 V AC, 50 Hz (neutral conductor required)

Switching Capacity

Incandescent lamps :1000 W

Halogen HV lamps : 1000 W Halogen LV lamps with

TRONIC transformers :750 W

Convent. transformers :750 VA

Conv. transformer with at least 85 % rated load.

Fluorescent lamps

Uncompensated :500 VA

Shunt-compensated (47μF):400 VA

Twin-lamp circuit:1000 VA

Energy-saving lamps: When using energy-saving lamps,

mind high surge peak currents.

Check lamps for suitability prior to use

Relay output: 1 potential-free n. d. contact Not suitable for disconnecting

Switching time interval :1 minute min.

Connecting terminals : Screw terminals for 2.5 mm ^2 max. or 2 x 1.5 mm ^2

Automatic cut-out :16 A max.

6. Acceptance of guarantee

We accept the guarantee in accordance with the corresponding legal provisions.

Please return the unit postage paid to our central service department giving a brief description of the fault:

Telephone:149 (D) 23 55/90 5-0

Telefax: +49 (0) 23 55 / 90 5-111

NL Inhoudsopgave

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CE The CE-sign is a free trade sign addressed exclusively to the authorities and does not include any warranty of any properties.