Siemens SENTRON 5TT7 System Manual page 26

Module
2.5 Configuring
● Name (this name must be unique and cannot be used with any other input or output. The
factory defaults are DI1 to DI8.)
● The digital inputs can generate messages if:
– a rising flank is detected: the status changes from 0 to 1.
– a falling flank is detected: the status changes from 1 to 0.
For every DI, a delay can be set with which it responds to status changes. The UI LED
flashes during the delay. A change is ignored if the input signal's status changes back again
before expiry of the set time.
Set the value 0 if you wish to deactivate this function.
Reading from a digital input
To query the status of a digital input, send the "ruin
number of the requested input.
The module responds with: „status DIn=x"
If the digital input has been assigned a special name, this input can be addressed by putting
the name between asterisks.
For example, the status of an n put called 'Door' can be queries by sending an SMS with the
text "r*door*". The module responds with "status door=x".
Out terminal
The Out terminals offer a voltage source that can be used to power the digital inputs.
When using the module's Power Down function, you are advised to use this voltage source
instead of the module's normal supply voltage.
If you use the supply voltage for the digital inputs, it is possible that the module will interpret
failure of the supply voltage as a change to the digital inputs before it detects the "Power
Down" state. Then, the module reports the change at the digital inputs to the entered users
first. In certain circumstances, after that there are no longer sufficient power reserves to then
also send the "Power Down" message.
Note
V+ is a source with a maximum current of 20mA that is designed for signaling only. This
output is not suitable as a power supply for other control tasks.
26
"
SMS to the module, where 'n' is the
System Manual, 06/2014, 2541304131-01
GSM alarm module