Question: Can I connect more than one magnetic contact to the transmitter of the DS90?
Answer: Yes, you can connect several magnetic contacts. The DS90 sensor has an extra input. If you want to connect more than one extra magnetic contact, you need to connect them in serial.
Question: Can I connect other alarm contacts to the transmitter of the DS90?
Answer: Yes, you can connect any type of NC (normally closed) contact to the extra input on the DS90 (e.g. smoke detectors with a NC relay contact). The extra alarm contact has its own zone number on the console.
Question: Does the tamper function of the DS90 also work on my SC2200/SC2700/SC2800 alarm system?
Answer: No, the tamper function is a specific function on the SC9000 alarm system (SafeGuard and TotalGuard).
Question: My DS90 causes a false alarm, what could be the problem?
Answer: Sometimes there are electrical currents in aluminium door and window frames. These can trigger the DS90. If this happens, it is best to use an MS90 motion detector for the room instead.
Also, check whether the distance between the transmitter and the magnetic contact is not too large.