
Perimeter layout guidelines
FlexPS Product Guide
Page 21
Grounding considerations
The FlexPS sensor system requires a single ground reference. A stable low resistance earth
ground is required at each processor mounting location, and the entire system is referenced to this
ground. Consult the local electrical code for grounding requirements.
Alarm monitoring
Alarm monitoring is site specific and depends on whether you are using relay output alarm
communications (Local control mode) or network based alarm communications (Remote control
mode). Each processor has four user-configurable Form C relay outputs. In Local control mode,
the processor uses the four relays to signal alarm and supervision conditions. For network based
processors, alarm data is carried over the network cables and the four relays are available as
output control points from the head end system.
Auxiliary inputs
The processor includes two auxiliary/self-test inputs. In Local control mode the inputs are used to
activate electronic self-tests and to activate the audio listen-in function. In Remote control mode
the auxiliary inputs are used to report the status of two auxiliary security devices to the head end.
NM Mode
The FlexPS processor can be configured to report alarm and supervision conditions through the
UltraLink modular I/O system. In NM Mode, the UltraLink I/O processor acts as the Network
Manager, providing alarm outputs for a connected network of up to eight Silver devices. In NM
Mode, the Silver devices do not require a connection to a PC running Silver Network Manager
software. Sensor alarms and supervision conditions are assigned to UltraLink I/O outputs (relay or
open collector). When an alarm occurs on a connected sensor, the corresponding UltraLink I/O
output is activated (see
for additional details).
Audio listen-in
The FlexPS sensor cable is microphonic and picks up acoustic fence noise along the zone. The
processor can place the audio from its two monitored zones on an audio bus. The audio system
requires a single twisted shielded pair, with 35 pf/ft. or less capacitance. (Belden 8761 has a single
shielded twisted pair of 22 AWG wire.) An amplifier with a 600 Ohm impedance input and a good
quality speaker can be used with FlexPS to provide audio assessment at the control center. In
Local control mode, the audio output is activated through the processors AUX inputs. In Remote
control mode the audio output is activated by a command from the host computer.
Note
It is possible to use relay output alarm communications and setup a
Silver Network for maintenance purposes. This enables remote
calibration, maintenance and diagnostic access to your FlexPS
processors from a central control facility.