PERTRONIC INDUSTRIES LTD
INSTALLATION / OPERATING INSTRUCTIONS
Loop Responder (For PCB versions 2.30 and greater)
Pertronic Industries Ltd
1 of 2
Loop Responder Issue2 Sept 2002
Overview
The
Loop Responder
is used primarily to interface zones of conventional detectors into
Pertronic
analogue addressable fire alarm systems. Other uses include monitoring the interference switches
of sprinkler valves, reading the fault and alarm status from Vesda systems, or receiving commands
from a SCADA system.
Additionally, the
Loop Responder
has a set of clean change-over contacts that can be utilised by
the panel and mapped as a loop relay.
The
Loop Responder
uses 9 module loop addresses—the first eight for input circuits 1 to 8, and
the ninth for the relay.
A limited number of
Loop Responders
may be powered from the loop; when larger numbers are
required, they may be powered from a supply or supplies that must be electrically isolated from the
panel supply.
Addressing
Select the base address (01 to 91) using the two loop address switches labeled
ADDRESS
located
at the bottom-right of the PCB. (Refer to the diagram overleaf.)
The
Loop Responder
uses 9 module loop addresses: the first or base address for Circuit1; the
second address (base a 1) for Circuit 2; and so on to the eighth address for Circuit 8 (base
a 7). The ninth address (base a 8) is assigned to the output relay.
Each loop can have a maximum of 100 modules (addresses 00 to 99), so the highest base address
the
Loop Responder
can have is 91.
Smoke Detector or Switch Input Selection
Link
LK1
, located at the center-bottom of the
Loop Responder
PCB (refer to the diagram
overleaf), is used to select the function of the inputs.
When
LK1
is removed, normal conventional circuit operation is used for all 8 circuits—for
using smoke detectors, indicating heat detectors, and manual call points.
When
LK1
is inserted,
switch input
operation is used for all 8 circuits. This mode of operation
allows the use of switch or contact opens and closures for the alarm states.
Loop and External Power Supply
Switch
S1
, located at the top RHS of the
Loop Responder
PCB, is used to select external or loop
powering of the detector circuits. The micro-processor and loop interface components are always
powered from the loop, but, by using
S1
, either the loop or an external supply can be selected to
power the detector or switch circuits. The purpose of this is to conserve the power requirement from
the loop when a number of Loop Responders are used together.
The maximum loop current allowed for all connected loop devices is 350mA per loop.
When the switch is pushed to the right—to the
Loop Power
position, the loop supplies the power to
the circuits.
When the switch is pushed to the left—to the
External Power
position, the external supply provides
the power to the circuits.
Loop Powered Connection
Externally Powered Connection
