SVS TX-121 Mode D'emploi page 4

The product should only be used in a case adequate for mains-voltage if applied!
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The board is a state-of-the-art product. However, there is a risk of danger if installation or operation is performed by unqualified
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personnel
3 System operating range
The system SH-12 is designed for a large operating range of many hundred meters. Walls including steel reinforced concrete can be
penetrated. The maximum range can be achieved under optimum conditions and by line-of-sight contact between transmitter and
receiver without disruption by external high frequency disturbances.
The following are possible causes that could reduce range of operation:
Obstructing buildings, vegetation or other factors will substantially reduce the operating range.
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The distance between the antenna and the operator's body or other conducting objects (e.g. Earth) may influence the working
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range.
Background "electrical noise" could be relatively high so that the signal-to-noise-ratio may decease and therewith the operating
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range. Also other devices, with similar operating frequency, operated in the neighbourhood of the transmitter may reduce the
sensitivity.
Operating the transmitter adjacent to badly shielded electronic components (e.g. PC's) that can produce electromagnetic distortion,
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may severely reduce the range of operation and could result in intermittent operation.
Adjustable and open components should not be adjusted or modified.
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4 Description
TX-121 needs a power supply of 4,5 ... 16 V DC. Because of its very
low power consumption the device is suited also for battery
applications.
With help of the transmitter module CX-12 T the TX-121 is able to
transmit a switch signal along a selectable channel. The activation of
the potential free contact, e.g. by a sensor or other devices, will
initiate the transmission of the selected radio signal.
In switching operation mode only state changes initiate a
transmission. In push button operation mode the transmission
continues as long as the button is pressed.
LED1 flashes 3 times per second while TX-121 is transmitting and is
receiving the acknowledgement of the receiver. If the supply is weak
the LED1 double-flashes 3 times per second. In case that TX-121 do
not receive the acknowledgement the LED 1 flashes quickly for about
2s as an indicator that connection is searched. After this time without
any correct answer the transmission is stopped.
LED 2 flashes after each Start and Stop of transmission to indicate
the receivers confirmation. When using CX-12 R this function depends on the wiring of the receiver module and may be different.
5 Installation
Start installing the Transmitter-module CX-12 T, connecting the receiver carefully to the socket on the board. Make sure the Transmitter
is fixed and all Pins are connected well (solder them). Then solder the antenna cable (173mm) in the appropriated pin (ref. Fig.)
Please adjust the antenna so that as free-standing as possible.
Supply voltage: Connect the supply voltage to the input 4,5...16V DC.
Take care of the technical data and of the supply polarity. Maximum supply voltage is 24V DC. Greater supply voltage
destroys the transmitter module.
All transmitters, such as TX-121 have to be teached to the corresponding receiver. For further details please refer to the receivers
manual. Transmission may be initiated by shortening the both screws (ext. contact). Please keep a distance of about 1m between
transmitter and receiver.
Beginning with the receiver version HSW xx.20 it is possible to learn transmitters with or without acknowledgement.
The corresponding learning proccess may result in a reconfiguration of the transmitter. This may lead to
incompability with receivers, which have previously learned this transmitter.
For further description of functions and features, the correct preparation and tooling off the module is expected.
Please select according the following table which of the 4 bits T1-T4 shall be transmitted. T1 to T4 correspond also to the 4 push
buttons of a hand held transmitter of the series SH-12. This allows to control for example the same receiver in parallel by TX-121 and
another transmitter.
Furthermore you may select between push button- or switch operation mode. The push button operation mode will transmit the signal
as long as the external contact is closed whereas the switch operation mode will transmit the signal for about 2 s at any time the
contact changes its state (ref. following table).
CX-12 T
LED 1
LED 2
- 4 -
Antenna 173 mm
Supply T1
DIP Switch