Siemens SENTRON 5TT7 System Manual page 32

Module
2.5 Configuring
Linking inputs and outputs (DIs to DOs)
The digital outputs (DO1 to DO4) can be linked to the respective digital inputs (DI1 to DI4).
For example, if there is a change to the input DI1, the associated output DO1 is switched to
1.
The DO's status can still be switched at any time via an SMS message.
Note
This function can lead to conflicts when using the SMS or ring function.
Switching ON when GSM connection lost
When this function is chosen, the output is activated as soon as there is no longer a
connection to the GSM network. It is deactivated as soon as the connection is restored.
Note
This function can lead to conflicts when using the SMS or ring function.
Preserve status on startup
The statuses of the outputs are stored prior to restarting and are then restored. If this
function is not selected, the outputs remain deactivated after restarting ("0" setting).
Wiring example
In this example, D01 is implemented as a normally-open contact and D04 as a normally-
closed contact.
NOTICE
Connect only to a single-polarity supply!
32
GSM alarm module
System Manual, 06/2014, 2541304131-01