2N Helios User And Service Manual

Also see for Helios: User manual

2N Helios User And Service Manual Manual pdf 23 page image

23Description of TerminalsGND This terminal protects Helios against static electricity damage.SW1 Switch 1 designed primarily for electric doorlock control.LIGHT These two terminals are connected to the 12V power supply witharbitrary polarity. The power supply can feed the electric lock too.LINE These two terminals are connected to the analogue telephone line withany polarity.-VIDEO +Video signal output – used only if a camera unit is included. Thecoaxial cable is connected with an internal conductor to +, withshielding to -.Description of JumpersConnector (8)• Here connect the current call indicator (LED).• Write-protection (if the jumper is mounted).• do not connect• Microphone sensitivity reduction (mount the jumper for noisyenvironments).Camera setting – connector (18): refer to the instructions enclosed to the camera unit.Parallel ConnectionParallel connection of multiple telephone sets was commonly used in the era inwhich telephone lines were rare, It carries unnecessary risks to connect the unit in thisway. It is in no case recommended to connect Helios in parallel to another telephone oranother Helios door communicator. It is neither admissible to use equipment thatswitches one line between two or more sets (intelligent double branch, etc.).7.1. Common InstalationTypical Electric Lock ConnectionHelios contains a solid-state switch equipped with V-MOS transistors, which is ableto switch both ac and dc regardless of polarity. Make sure that the current and voltagevalues do not exceed limits (refer to the Technical Data) and that the technicalparameters of the lock and power supply are compatible.