7.1.Installation
Each PIN input is designed to be connected in a loop via an open/close contact source from an alarm panel, or other device, to a reference ground PIN [19] available on the IRIS dialer, as shown below:
Reference ground | Pin inputs | |||||
1 | 4 | |||||
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Opening the contact (i.e. loop is open circuit) generates an alarm signal. Closing the contact generates the equivalent restore signal.
It is also possible to link the contacts to the IRIS dialer via sense resistors so that an open or short circuit tamper on the loop can be detected and the Monitoring Centre alerted. In this case the connections should be made as shown below:
Reference ground | Pin inputs | |||
1 | 4 | |||
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15K Resistor
4K7 Resistor
Note: For this feature to work correctly it is essential that the resistors are connected at the contact end of the loop and not the dialer end. The Monitoring Centre must also enable this facility on the dialer.
Iris Touch 200 Range Dialer Installation Manual | 9 |