YT202Manual Page 1 of
2
©
2008 Convoy Security
INSTALLATION AND MAINTENANCE INSTRUCTIONS
YT202, YT202T
Intelligent Photoelectric Smoke Sensors
Used instead of Honeywell, System Sensor, Notifier, Johnson Controls
Convoy Security
Honeywell
System Sensor
Notifier
Johnson Controls
YT202
TC806A1037,TC906
ZM992, 2251B, 2551
ND682
，
SDX-751
2251J,2551J
YT202T
2251TB,2551T
SPECIFICATIONS
Operating Voltage Range:
15 to 32 VDC
Standby Current:
300
µ
A @ 24 VDC (one communication every 5 seconds with LED blink enabled)
Maximum Alarm Current (LED on: ) 2.5 mA @ 24 VDC
Operating Humidity Range: 10% to 93% Relative Humidity, Non-condensing
Operating Temperature Range:
32
°
F to 120
°
F (0
°
C to 49
°
C)
Heat Sensor: 135
°
F Fixed Temperature Electronic Thermistor (only YT202T)
Height: 2.3
˝
(59 mm) installed in Base
Diameter: 4.1
˝
(105 mm)
Weight: 4.6 oz. (130 g)
BEFORE INSTALLING
This sensor must be installed in compliance with the
control panel system installation manual. The installation
must meet the requirements of the Authority Having
Jurisdiction (AHJ). Sensors offer maximum performance
when installed in compliance with the National Fire
Protection Association (NFPA); see NFPA 72.
GENERAL DESCRIPTION
Models YT202, YT202T are plug-in type photoelectronic
smoke and heat sensors with addressable analog
communications. The sensors transmit an analog
representation of smoke density or temperature over a
communication line to a control panel. Inside MCU
’
s
EEPROM keep the sensor
’
s address that can be set by a
portable Address setting device.
Two LEDs on the sensor are controlled by the panel to
indicate sensor status.
Models YT202T combine a photoelectronic sensing
chamber and 135
°
F (57.2
°
C) fixed temperature heat
detector.
The YT202, YT202T require compatible addressable
communications to function properly. Connect these
sensors to listed-compatible control panels only.
WIRING GUIDE
All wiring must be installed in compliance with the
National Electrical Code, applicable local codes, and any
special requirements of the Authority Having Jurisdiction.
Proper wire gauges should be used. The installation wires
should be color-coded to limit wiring mistakes and ease
system troubleshooting. Improper connections will
prevent a system from responding properly in the event of
a fire.
Remove power from the communication line before
installing sensors.
1. Wire the sensor base per the wiring diagram, Figure 1.
2. Set the desired address by portable address setting
device.
3. Install the sensor into the sensor base. Push the sensor
into the base while turning it clockwise to secure it in
place.
4. After all sensors have been installed, apply power to
the control unit and activate the communication line.
5. Test the sensor(s) as described in the TESTING section
of this manual.
Figure 1. Wiring diagram:
Dust covers provide limited protection against
airborne dust particles during shipping. Dust covers
must be removed before the sensors can sense smoke.
Remove sensors prior to heavy remodeling or
construction.
TAMPER-RESISTANCE
Models YT202, YT202T include a tamper-resistant
capability that prevents their removal from the bracket
without the use of a tool.
TESTING
Before testing, notify the proper authorities that the
system is undergoing maintenance, and will temporarily
be out of service. Disable the system to prevent unwanted
CAUTION
A B
S
A B
S
H
o
n
e
y
w
e
ll
In
te
ll
ig
e
n
t
F
ir
e
A
la
rm
C
o
n
tr
o
l
P
a
n
e
l
Loop(+)
Loop(-)
Loop(-)
Loop(+)
OPTIONAL RETUREN LOOP
©
CONVOY
SECURITY
