SIM card

An activated SIM card of a GSM network provider is used (e.g. T-Mobile D1, Vodafone D2, E-Plus, O2 – even prepaid cards). The card is prepared for use in the GSM alarm module in a conventional cell phone, by setting the PIN to "1234". The device can then be simply configured and put into service without any software tools or programming skills. The status of two digital inputs are monitored and in the event of any change, an SMS is sent. By sending an SMS from a cell phone to the GSM alarm module you can switch the output.

Administrator

One cell telephone number has administrator rights. This administrator number is used to specify the signaling and control texts, define time responses at outputs and inputs and register and store up to 5 further phone numbers in the device. An SMS alarm message is then also sent to these 5 phone numbers in the event of a fault.

Freecall function

The freecall function is an extremely interesting feature and - unlike the sending of SMS messages - completely free. It can be used for the functions of the GSM alarm module. By simply selecting the device, this function can be used to switch the output, switch it over or call up the switching states of inputs and outputs. The GSM alarm module detects the phone number that is calling, checks the authorization and executes the desired function. To use this function, the anonymous call feature must be disabled on the phone being used.

Safety in the event of power failure

Any device power failure is detected by the 5TT7 120-0 GSM alarm module. The device then sends an appropriate alarm SMS and switches itself off.

Status interrogation

A status SMS can be used to query the switching state of both inputs and the output. If required, the freecall function can also be used for this purpose.

Heartbeat function

The GSM alarm module automatically sends a status SMS at user-definable intervals.

User-definable device name

In the devices, users can define their own device names. This device name then prefixes each SMS. If more than one device is in use, the user can clearly see where the alarm has occurred.

Power-On SMS

If required, the GSM alarm module automatically sends a so-called Power-On SMS with device name and time delay after the system is switched on. A time delay can be set for the inputs. If there is a change in the device state, the alarm SMS is then not sent until the set delay time has expired.

Time delay

The adjustable delay time serves to suppress the sending of multiple alarm SMS texts, e.g. in the case of chattering contacts. This time is started after an alarm SMS is sent. No further SMS is then sent within the set time interval.

Monoflop function

This allows a time to be set after which the output is automatically reset to zero.

Password protection

If the password protection is activated, the password must be entered as a prefix to each SMS. This protects against unauthorized access.

Interrogation settings

All the settings of a device can be called up using a range of of SMS interrogations.