Receiver/Transmitter (Rx/Tx) Module; Receiver/Transmitter Module, Details - Kidde Fire Systems PEGAsys Installation, Operation And Maintenance Manual

Intelligent Suppression Control/Fire Alarm System
3-3.2 Receiver/Transmitter Module (RX/TX)
The RX/TX functions as the hardware & software interface be-
tween the loop devices and the CCM. Each installed RX/TX
module continually monitors all addressable devices for alarm
and trouble conditions. Each device is capable of initiating and
sending alarm and trouble messages to the RX/TX module to
which it is connected.
CPU Reset
PC Line Normal
CPU Reset
PC Line Reset
Note: Refer to jumper table on Dwg. 06-235371-002 in appendix I
STYLE 6 Signal Line Circuit
1
2
3
4
STYLE 4 Signal Line Circuit
1
2
3
4
76-100016-001
See Note
Loop Isolator
for Style 7
(74-200012-001)
See Note
Isolator
Isolator
Figure 3-4. Receiver/Transmitter Module, Details
3-3
The RX/TX receives control requests from the CCM and estab-
lishes communications with the loop devices. The RX/TX re-
ceives status changes from the loop devices and reports these
changes to the CCM. The RX/TX shown in Figure 3-4 is ca-
pable of communicating with up to 255 intelligent devices and
complies with the Signaling Line Circuit (SLC) requirements of
NFPA-72 Style 4, 6 & 7. Style 4 initiation circuit wiring will per-
mit "T" tapping or branch circuitry. Style 7 requires the use of
optional loop isolator devices.
STYLE 6 Signal Line Circuit, with Loop Isolator
Loop
Isolator
Zone 1
Loop
Isolator
LOOP ISOLATOR
Mounted to RX/TX
74-200012-001
RX/TX
Note: Each zone can consist of 30 loop devices
between loop isolators
STYLE 7 Signal Line Circuit
Loop
Isolator
Zone 2
Loop
Zone 1
See Note
Loop
LOOP ISOLATOR
Mounted to RX/TX
74-200012-001
RX/TX
NOTE: Adjacent loop isolators must be within 20ft. Of a device with wiring in conduit
to be in accordance with NFPA Style 7 requirements.
PEGAsys
Zone 2
Loop
Isolator
Zone 3
Loop
Isolator
Loop
Isolator
Loop
Isolator
Zone 3
Loop
Isolator
August 1999