IDS 1632 Installer Manual 700-256-02K Issued September 2009112.1 Additional Technical Data A suitable transformer with an output voltage of 16 volts AC ±10% with a 32VA minimum ratingmust be used A 12V sealed lead acid battery with a minimum capacity of 7AH must be used. The back upperiod after mains failure will depend on the number of keypads, sensors and peripheral devicesconnected to the system. The panel can supply a total continuous current of 750mA to peripheral devices such as keypads,remotes, receivers, passives etc. Connect a 12 volt self-driven siren or piezo siren [not a horn speaker] to the siren output.2.2 End-of-Line Resistors(Including Tamper by Zone / Zone Doubling) All zones must be end-of-line supervised. Any unused zones must be terminated with a 3K3 resistor. The end of line resistor must beplaced inside or as close to the sensor as possible. If neither zone doubling nor tamper by zone are required the 3K3 resistor must be used. For zone doubling or tamper per zone, the 4K7 and 12K end-of- line resistors must be connectedas per Figures 2 and 3.Figure 2 : Tamper by Zone ConnectionTamper operation is as follows: If the panel is unarmed and a tamper condition occurs, the siren will not sound but a tampercondition will be reported. If the panel is armed and a tamper condition occurs an audible alarm will register and a tampercondition AND zone violation will be reported. Panic zones always register panic and tamper conditions. The colour codes for the 12K and 4K7 resistors are as per in Figure 4.