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TRAILER CONVERTER 24-12V TLUB / C – 11127

For all vehicles with 24V electrical systems running with 12V trailers.
Extra 24-12V inverter is now unnecessary.
With lamp simulation for activating the trailer control light C2 in the cab.

TLUB
With a newly developed lamp simulation, a 24V flash relay perceives a 12V lamp as a 24V lamp, so that control lamp C2 always works correctly, even in the case of short circuits and possible downtime.

TLUC
An affordable further development of TLUB, with an approximate lamp simulation, so that virtually all 24V flash relays will perceive a 12V lamp as a 24V lamp. Indicator C2 will work correctly, even in the case of short circuits and possible downtime.
TLUB and TLUC are waterproof and intended for exterior and interior mounting.

They are waterproof and protected against short circuits, overloads and fault polarization.

When the trailer is short-circuited / overloaded, TLUB / C automatically interrupts the faulty function. When the short circuit is removed, the function in question works again. This avoids switching of fuses.

Function:
TLUB: For flashing lights a 24-12V Switch mode converter is used, in other functions pulse technology.

TLUC: A combination of resistance and pulse technology is used for flashing lights, in other functions pulse technology.

TLUB-6 6 Outputs Nr. 11116
TLUB-7 7 Outputs Nr. 11117

TLUC-6 6 Outputs Nr. 11126
TLUC-7 7 Outputs Nr. 11127

 

TLUB / C 24-12V Trailer Converter.

Why lamp simulation for flashlights?

Most flashing relays measure the amount of power that is connected, and indicate on the cab control lights whether the correct number of lamps is available and whether they are the correct power.

This is defined e.g. on the flash relay as 3 + 1. That is, 3x21W on the trailer + 21W on the trailer.
In the cab there are 2 control lights, C1 is for the trailer and C2 is for the trailer.
In many flash relays, the current curve is measured with fairly high precision (see curve diagram).
For example, if an 18W lamp is used instead of a 21W lamp, the C2 lamp will turn off and indicate faults.

In order for indicator light C2 to show correctly when connecting a 12V trailer, a lamp simulation is necessary because a 12V / 21W lamp has a power consumption of 1.85A (Illustrated with the current curve in Fig. 2), whereas a 24V / 21W lamp has a power consumption of 1.0A (Illustrated with the power curve in Fig. 1.).

If the method is used with a series resistor or a linear converter to change the voltage from 24V to 12V instead of using lamp simulation, the disadvantage is that the control relay’s control function will perceive a 12V-21W lamp as a load of approx. 38W instead of the expected 21W, so the indicator light C2 will often show incorrect.

The TLUB is designed to simulate a power curve similar to the power curve of a 24V lamp, giving the correct load of 21W and thus correct display.

TLUC is designed with a simpler form of simulation than TLUB. Here, a combination of resistance and pulse technique is used. This technique causes most flash relays to indicate approximately correctly.

Fig 1. Power curve for a 24V lamp. Tip 2.0 Amp. Continuous 1.0 Amp.

FIG. 2. Power curve for a 12V lamp. Tip 3.8 Amp. Continuous 1.85 Amp.

Technical specifications TLUB:

Input voltage:24 V (20 – 32 V)
Output voltage indicator:14 V DC (with 28 V input)
Output voltage other outputs:14V RMS 130 Hz. (with 28V input)
Efficiency:Indicator outputs 90%. Other outputs 95%
Dimensions:L.132 MM x B.110 MM x H.43 MM

 

Technical specifications TLUC:

Input voltage:24 V (20 – 32 V)
Output voltage:14V RMS 130 Hz. (with 28V input)
Efficiency:Indicator outputs 90%. Other outputs 95%
Dimensions:L.105 MM x B.110 MM x H.43 MM

 

Effect:

Indicator outputs:2x21W
Backlight:2x30W
Fog taillight:2x21W
Reversing:2x21W
Brake light:2x21W

 

TLUB / C 5-7 is waterproof and in aluminum profile.
Cable lengths: 24V input: 1 meter x (7×1.0mm2 + 1×2.5mm2). 12V output: 1 meter x (7×1.0mm2 + 1×2.5mm2)

RELÆBOX P60 Trailer converter 24-12V

Order. 11105

Field of application
For all vehicles with 24V electrical systems running with 12V trailers

To change the voltage from 24 volts to 12 volts, 4-5 relays are used in the box. These are controlled by the 24 volts and conduct 12 volts from a converter out to the lamps.

The P60 can also be used for junction boxes by letting the main cable into the box and out to 24 volt socket.

Waterproof junction box and relay box in one for exterior mounting.
The relay box is waterproof with the help of cable glands, threaded holes and counter nuts.
Power per relay 8 amp.
Wiring: Flat connector
dimensions:
Length 105 mm x width 105 mm x height 64 mm.
Weight: 0.383 kg.
The house is made of plastic: protection IP55.

 

Accessories:

Print for P60.
Order. 11105H

Relay for P60.
Order. 11105J