Telephone Line Integrity Monitoring; Programmable Outputs - Inhep Digital Security IDS 404 Installer Manual

IDS404 INSTALLER MANUAL
protection connect a low impedance earth to the communicator. A
poor earth will be ineffective and may result in damage to the
communicator and alarm panel.
!
Always connect the telephone communicator in the line seizure
mode. Never in parallel with the telephone i.e. connect the
telephone receiver to the communicator terminals marked "phone"
and the incoming line to the terminals marked "line".

7. Telephone Line Integrity Monitoring

The IDS404 makes provision for phone line integrity monitoring. This is
done by monitoring the voltage provided by the telephone exchange
which in turn appears across the terminals marked line on the alarm
panel. If this voltage drops below 5 volts for a period longer than 60
seconds the panel will detect a line fault condition. This may be
indicated either by means of the keypad trouble condition (LED 7 if the
appropriate value is programmed into location 164). Additionally this
phone line condition may be used to activate a programmable output
by programming the appropriate value to location 51. A restoral of the
phone line will activate an output if an appropriate value is programmed
to location 52.

8. Programmable Outputs

A relay board must be used when any device requiring a high current is
connected to a programmable output. The current sink and source
capability is the same for outputs 1 to 4. The output circuitry consists
of a 12 volt source with a 56Ω series resistor. Current sink is via a
1000Ω resistor to negative. The output circuitry is provided in Figure 5
below.
1 0 IDS404 INSTALLER MANUAL NO. 700-277-02A ISSUED SEPT 2004 VER 1.02