4
The AT-WMBUS-04 RF module with pulse input is assembled with two mounting holes using screws and
wall plugs. Access to the mounting holes is possible after removing the housing lid. Before installing the device
on the wall, check the radio signal level. The device does not require an external power source and after
installation, it is immediately ready for operation.
The module can cooperate with many measuring devices equipped with an open collector pulse output or
reed switch and generating pulses with a minimum duration of the short circuit (breaking) equal to 65 ms. The
test voltage at the pulse input of the module is 3 V and the test current falls in the range of 0.5 mA to 1 mA.
When connecting the module to a measuring device with an open collector pulse output, it is important to
maintain the correct polarity of the connection cables. In this case, connect the module with the measuring
device as described in the figure below.
4.
INSTALLATION
Figure 2. AT-WMBUS-04 RF module
