GST GST852RP User manual

CONTENTS
1 Overview....................................................... 1
2 Features........................................................ 1
3 Specifications................................................ 2
4 Construction.................................................. 3
5 Operation...................................................... 7
6 Troubleshooting........................................... 10
7 Cautions.......................................................11

1
1 Overview
GST852RP LCD Repeater Panel is designed with
a microprocessor. It can be connected to the
RS485 loop of GST200, GST500 or GST5000 fire
alarm control panel, disposing and displaying
messages from the control panel like the location
and description message of thedetectors in alarm,
and give audible and visual signals. When several
floors or zones are monitored by one fire alarm
control panel, a repeater panel can replace the
zonal fire alarm control panel on each floor or in
each zone.
2 Features
GST852RP connects with fire alarm control panel
through RS-485 cable. Each RS-485 can have 64
repeater panels. This repeater panel only displays
fire alarm, but not other information like fault and
action.

2
3 Specifications
1. Operating Voltage: 24VDC
2. Display Capacity: Maximum 126 pieces of fire
message can be displayed by the repeater
panel.
3. Display Range: Each screen can display 1
piece of fire message. If there are more than
one piece of message, it will display them in
turn. Pressing Self-test/Scroll key can
manually display the next.
4. Wiring: Connecting with fire alarm control
panel by polarity sensitive two-wire; two
additional 24VDC power are needed which are
polarity insensitive.
5. Operating environment:
Temperature: 0℃～+40℃
Relative Humidity≤95%, non condensing
6. Quiescent power consumption≤2W
Maximum power consumption≤5W

3
4 Construction
4.1 Front Panel
4.1.1 Front panel of the repeater panel is shown in
Fig. 1.
On Fire Mute
Fig. 1
4.1.2 Keys and indicators
Self-test/Scroll key: In monitor state,
pressing this key, the repeater panel will check all
indicating parts automatically. In alarm state,
pressing this key can review each alarm in
sequence when there are multiple alarms.

4
Screen saver/Mute key: In monitor state,
pressing this key, the repeater panel enters
non-power-saving mode, which is defaulted as
power-saving mode on power-up. In alarm state,
pressing this key, the alarm sound is silenced.
Pressing it again, the sound resumes. If it receives
an alarm again in mute state, it automatically
sounds again.
On LED: Green. It illuminates when the
repeater panel is working.
Fire LED: Red. It illuminates when any of the
detectors reports fire.
Mute LED: Yellow. It illuminates when the
repeater panel is in mute state.
4.2 Installation
The repeater panel is wall-mounted. External
cables areconnectedtoits basewhichis shownin
Fig. 2.

5
IN
24V- 24V-
OUT
24V+
IN
24V+ OUT
OUT
IN
OUT BBOUTIN
AINA
Mounting
Hole Mounting
Hole
Terminals
Fig. 2
4.2.1 Installing the base
a. Drill two Φ8mm holes on the wall with 166mm
spacing.
b. Insert two Φ8 expansion sleeves into the
holes.
c. Put the base on the wall. Twist plugs through
the mounting holes of the baseinto the expansion
sleeves.

6
4.2.2 Wiring
Terminals on the base are shown in Fig. 2, and
those on the repeater panels are shown in Fig.3.
Connection of these terminals is as follows:
AIN, B IN: connecting with terminals Aand B from
the repeater panel (Fig. 3) respectively.
A OUT, B OUT: connecting with RS-485 loop.
24V +IN, 24V –IN: connecting with D1 and D2
from the repeater panel (Fig. 3) which are polarity
insensitive.
24V +OUT, 24V –OUT: connecting with 24Vpower
supply which is polarity insensitive.
“IN” connects to the “ ” of the repeater
panel as in Fig. 3; “OUT”connects to the
ground.
4.2.3 Installing the repeater panel
Aligning the three holes on the repeater panel to

7
the studs onthebase, push it to the wall vertically
and slide it down until the top two hooks appears
to hook up the repeater panel.
ABD2D1
150mm
Fig. 3
5 Operation
Open the cover on top of the repeater panel, you
can turn on or off the power, adjust LCD definition,
and set code of the repeater panel (Fig. 4). Keys
for setting the repeater panel are shown in Fig. 4.

8
LCD.
ADJ
SET
CODE
POWER
Fig. 4
5.1 Power-up
Turn on the power to repeater panels in the fire
protection room, then turn on the POWER switch of
the field repeater panel, it will test itself
automatically. After self-test, it will enter monitoring
state with the ON indicator illuminating.
5.2 Adjusting LCD definition
You can adjust the LCD. ADJ (Fig.4) and makethe
LCD clearer.

9
5.3 Setting device code
According to project requirement, you can set the
system by the SETCODE button. The method is:
Switch onthe repeater panel, then press and hold
the SETCODE button while the repeater panel is
rebooting (the device code on the LCD screen is
flashing), the code number of the repeater panel
increases. Release the button, the code number
stops increasing and the displayed number is the
device code.
Note: The device code ranges from 01 to 64.
After the code number is up to 64, it will return
to 01.

10
6 Troubleshooting
Problem
Connecting with a fire alarm
control panel, the repeater panel
cannot be registered after starting
Reason
s
Communication between the
repeater panel and the fire alarm
control panel is abnormal.
(1) The polarity of RS485 is
reversed.
(2) RS485 cables are not threaded
as required.
(3) RS485 cables are threaded in
the same conduit with strong
current circuit.
Solution
(1) Change the polarity of RS485.
(2) RS485 should be connected by
requirements.
(3) Separate the RS485 cables
from strong current circuit.
Remark
s
The LED of repeater panel should
flash once in 10 seconds after the
problem is resolved.

11
7 Cautions
1. This panel is precision electronic product and
must be maintained by professional person.
2. Please contact your local distributor for any
problem. Never open the repeater panel and
repair it.

Gulf Security Technology Co., Ltd.
No. 80, Changjiang East Road, QETDZ,
Qinhuangdao, Hebei,
P. R. China 066004
Tel: [phone]
Fax: [phone]
service.gs[email protected]tc.com
www.gst.com.cn