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3 System Operating Range
The system is designed for a large operating range. 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 the range of operation:
• Background "electrical noise" could be relatively high so that the signal-to-noise-ratio may decrease and
consequently affect the operating range. Also other devices, with similar operating frequency, operated in
the neighbourhood of the receiver may reduce the sensitivity.
4 Operation Description
The SHR-7 K1 provides the choice of a key-function or a timer switching function (up to 60 minutes) as well as
a steady switching function.
• A channel with key-function can be set with the shortest timer setting (refer to table 1). The relay remains
closed as long as the transmitter key stays activated.
• For applications, where, for example, inductances produce signal glitches due to electromagnetic
interference during the switching process (apparent relay bouncing), the timer setting can be increased in
small steps. The resulting delays, which can be considered as falling edge delays, avoid the undesirable
bouncing of the relay contacts when short glitches occur.
• Furthermore, the adjustable timer settings provide time-limited switching (falling edge delayed) of any
number of devices.
• For applications that require a steady on/off switching, the user can select the static function (one button
switches on and a second button switches off)
Independently of the selected function, the relay can be controlled also by a wired connection, e.g. via an
external push-button (not included in delivery).
5 Connection
All connections must comply with local regulations and standards, including VDE0100,
VDE0700, VDE0550/0551, VDE0711 and VDE0860. Only solid core cable is to be used for
connection, since stress relief is not provided on the product terminal connection block. As per
DIN 0700 / IEC 335 / EN 60335, no protective earth cable terminal is provided.
Voltages greater than 35V must be switched only with the relay when the receiver is mounted in an
isolated case.
According to regulations, only authorised, qualified personnel must open or install this product. If in doubt,
seek professional help before attempting to install. Incorrect Installation can damage the product and other
connected devices and increase the risk of electric shock, damaged contacts, or fire hazard.
Attention. Extreme danger!
When opening the product, live components may be touched. Isolate SHR-7 K1 from the mains power
supply before opening. Ensure that all connected devices and components are also disconnected from
the mains-power supply.
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