Building Technologies
- 24 -
TEL50.GSM
7.4 Digital I/O status
In this section, the idle and/or operating condition of the digital input IN1 and relay outputs OUT1 and OUT2 can be redefined.
The factory setting has the following conditions:
- The alarm input IN1 is active high, ie. the alarm is sent with the input IN1 closed
- The control outputs OUT1 and OUT2 are normally open
For input IN1, the alarm status (active low or high) for sending notification to all the users is defined whereas for the outputs, the
idle state is defined (normally open or closed).
These settings can be modified as shown in the table below
SMS command SMS
reply Action
DIGITAL IN1-ALARM=0
IN1-ALARM=0
input IN1 active open
DIGITAL IN1-ALARM=1
IN1-ALARM=1
active input IN1 closed (factory setting)
DIGITAL OUT1-CONTACT=0
OUT1-CONTACT=0
control output 1 normally open (factory setting)
DIGITAL OUT1-CONTACT=1
OUT1-CONTACT=1
control output 1 normally closed
DIGITAL OUT2-CONTACT=0
OUT2-CONTACT=0
control output 2 normally open (factory setting)
DIGITAL OUT2-CONTACT=1
OUT2-CONTACT=1
control output 2 normally closed
