Operating Instructions

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Four-channel radio-telecontrol with d+ relay

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Functional description / Operating instructions four-channel radio-telecontrol with D+ Relay Type EL 155 The four-channel radio-telecontrol system consists of 1 hand transmitter and 1 receiving module. With two of the four control buttons in the hand transmitter two independent relays in the receiving module can be switched. Both channels are provided for connection of an external selective switch. Consequently, both electric circuits can also be switched on or off without telecontrol by the connected selective switches. If a voltage of 12 V is set to the D+ signal, the external channel-light will be switched off by an additional relay. The two other channels can be used for raising or extending the electric stairs by motor. If a voltage of 12 V is set at the Signal D+’’ the stairs will be raised automatically while the vehicle is in motion. The motor is triggered until this singnal will be interrupted by an looped-in limit stop switch. If an additional key button is connected, the motor can also be controlled manually. The distribution voltage (to be connected to the receiving module) is used for supply of the receiving and logic electronics as well as of the connected consumers. For electric supply of the receiving and logic electronics as well as the relay control also a rectified, non-flattened voltage with an arithmetical average of 12 V DC can be used - besides battery voltage. This kind of power supply is also suitable for incandescent lamps. If equipment or lighting fittings will be connected that require flattened and regulated power supply, a corresponding voltage is to be set at the connections + 12 V and GND. Attention! Please observe the correct polarity of the connected voltage. A wrong power supply may damage the receiving module. Switching on and off of the corresponding channel is done by repeated operating of the key button in the hand transmitter. After setting the distribution voltage at the receiving module it may be necessary to press the key in the hand transmitter two times in order to change the switching state of the connected consumer (depending on the last switching state that has been selected). Attention! Please press the key button of the hand transmitter only as long until the relay has been switched. Any longer pressing may reduce the service life of the battery in the hand transmitter. Data communication from hand transmitter to receiving module is effected by radioengineering based on a carrier frequency on the 433 MHz band. All information will be coded before transmission. Codification of the transmitting signal will change after each transmission according to a patented system (Rolling Code). Successful data transmission is only possible with a transmitter to which the respective receiving module has been „trained for“. Up to 15 hand transmitter can be „trained“ at one receiving module. Training of one ore more hand transmitter is done according to the following scheme: Set voltage at the receiving module. Press the key in the receiving module (please also see the sketch) for 1 second by inserting a nonconducting object in the bore at the casing cover.. Attention! Please do not use objects made of conducting material because this would cause short circuits in the electronics when pressing the key. Now please press key 1 (see sketch) of the hand transmitter to be trained for about 1 second.

Please press key 1 (see sketch) of each further hand transmitter to be trained Now please wait for about 30 seconds. After this period of time all hand transmitters are trained. The channels 1 and 2 are now ready for radio-remote-control. If the key in the receiving module is pressed for more than 35 seconds, all hand transmitters trained before will be set to „off trained“ and deleted for this receiving module. Replacement of hand transmitter battery If the LED integrated in the hand transmitter lights up only weakly when pressing a key or if you realize a clearly reduced transmitting power, it is necessary to replace the battery integrated in the hand transmitter. After releasing the screw at the back of the hand transmitter the top and the bottom part of the transmitter can be separated from each other. Now the empty battery can be removed and replaced by a new one. . Please always pay attention to the polarity when inserting a new battery! When re-assembling the top and the bottom part of the hand transmitter please verify that the printed circuit board is in the right position towards the bottom part and that the operation elements of the top part do not drop out of the fixing devices. Technical details receiving module Type EL 155 Distribution voltage: 12 V DC Number of switching channels: 4 2 Channels switched by bistable relays Channel 1+2 prepared for connection of an external selective switch Additional relay for switching-off channel 1 2 channels for motor triggering Key button connection for manual motor control Automatical raising of the stairs by signal D+’’while the vehicle is in motion Current consumption at signal D+: max. 10 mA Maximum rupturing capacity per channel: 1+2: 12 V / 10 A Maximum rupturing capacity motor drive:12 V / 25 A Current consumption receiving stand-by: typ. 8 mA Incoming frequency: 433.92 MHz; 0.5 MHz band width Maximum number of hand transmitters that can be trained: 15 Codification: "Rolling Code" Technical details Hand transmitter Type EL 154 Distribution voltage: 12 V DC Battery Type GP23A 12 V 23 mAh Current consumption at operation: typ. 15 mA Number of control buttons: 2 Control-LED Transmitter frequency: 433.92 MHz; 0.5 MHz band width Codification: "Rolling Code" General notice 433 MHz radio-engineering The 433 MHz radio-engineering enables wireless radio data transmission on short and medium distances. The frequency of 433 MHz in Germany is – as well as in several other European countries – a generally released frequency, i. e. everybody can use allowed devices within this frequency band. For operation no separate registration of each single device or amateur radio licence certificates are necessary. Due to the legal regulations the transmitting power and band width are very small. Sometimes transmission problems may arise caused by:

Position of transmitter and receiving module Transmitter is activated by metal frames or similar objects. Objects between transmitter and receiver consist of ferroconcrete, metal plates or metal interlacing. A high degree of air humidity can also restrict the working range. The windows of the vehicle between transmitter and receiver are vaporized or covered by aluminium foil. Interferences There are other 433 MHz-products within the environs Electric sources of interference are in the immediate vicinity of the transmitter or receiver (for example microwave ovens, TV, computer or other domestic appliances)

Hand transmitter radio-telecontrol Extending the stairs

Key 2 Internal light

Key 1 „train“ External light

Raising the stairs

Receiving module radio-telecontrol, opened casing Key 1 „train“ Inside the device

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