Do not touch antenna connectors with live parts.
The product should only be used in a case adequate for mains-voltage if applied!
The Relay Board is a state-of-the-art product. However, there is a risk of danger if installation or operation is performed by
unqualified personnel
If the relay contacts switch mains power supply, the electronics has to be operated in a corresponding installation casing.
Attention. Extreme danger!
When opening the product, live components may be touched. Isolate SHR-12 K4 from the mains power supply before
opening. Ensure that all connected devices and components are also disconnected from the mains-power supply.
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.
The distance between the antenna and the operator’s body or other conducting objects (e.g. Earth) may influence the working
range.
Background “electrical noise” could be relatively high so that the signal-to-noise-ratio may decease and therewith the operating
range. Also other devices, with similar operating frequency, operated in the neighbourhood of the receiver may reduce the
sensitivity.
Operating the receiver adjacent to badly shielded electronic components (e.g. PC’s) that can produce electromagnetic distortion,
may severely reduce the range of operation and could result in intermittent operation.
Adjustable and open components should not be adjusted or modified.
4
Description
If the corresponding code has been learned before, the transmitter push buttons or digital inputs of the module CX-12 T can be
assigned to the 4 relay functions. The SHR-12 K4 provides the choice of a key-function or a timer switching function (up to 60 minutes)
as well as a steady switching function separately for each channel. The organisation of the functional contribution for each channel
allows to the user to construct an individual logic also between the channels.
A channel with key-function can be set with the shortest timer setting (refer to attached table). 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 steady on/off switching, the user can select the static function (one button switches on and a second
button switches off) or the toggle function (same button switches on and off)
Independent of the selected function, the relay can also be controlled by a wired connection, e.g. via an external push-button (not
included in delivery). In order to get feed back at the transmitters side the SHR-12 K4 returns information that allows the red LED to
blink.
5
Installation
For the location of the receiver module, select a place which is not shielded by conducting objects and position the antenna in such a
way that it is not subject to interference from the rest of the circuit and is parallel to the transmitter antenna. Connect the supply voltage
to the input 12…24V DC or 230V AC (mains supply) and the SUPPLY LED will turn on.
Take care of the technical data. Maximum supply voltage is 24V AC/DC or
230V AC / 50Hz. Greater supply voltage destroys the receiver.
Frequency Selection
All devices of the series SH-12 are delivered with the working frequency 433.62MHz. If
distortions at this frequency occur you may change over to the second frequency available
(434.22MHz) by selecting the position ON at DIP switch 5. Be sure that corresponding
transmitters communicate on the second frequency too.
Programming transmitters or keys:
In order to learn a transmitter or a key it is necessary to switch from the normal receive mode
to a learn mode by specific pressing of the LEARN/ERASE button. After that a transmitter
button has to be pressed in a distance of no less than 1m. Following learn modes are
available:
Learn mode I:
Learn a transmitter with acknowledgement of the transmitter signal. Press
1x
short the LEARN/ERASE button. The light of the LED beside the button
interrupts 1x every 2s.
Learn mode II:
Learn a single key with acknowledgement of the transmitter signal. Press
2x
short the LEARN/ERASE button. The light of the LED beside the button
interrupts 2x every 2s.
- 6 -
DIP-Switch LEARN/ERASE
Function
LED