Version:1023151027E
-1-
Instruction Manual of JTW-ZD-920KE Point-type Heat Fire Detector
------ Please read this Manual carefully before installing and using the product. -----
I. Product overview
JTW-ZD-920KE point-type fixed temperature heat detector (Detector hereunder) is a two-wire
switch-type temperature-sensing detector. As a non-polar two-wire connection is adopted in the detector,
it is compatible in conventional switch-type alarm control systems and
monitoring alarm systems. The detector can also be connected with
intelligent bus fire alarm control systems via a interface module. The detector
monitors temperature in the workplace in real time. While monitoring, the red
indicator blinks and the working current is low. When the work site
temperature has exceeded the preset alarm threshold, the alarm detectors
and the red indicator remain on, while the loop current is increased. The
detector’s alarm signal can be locked and is displayed by changes in the loop
current. The alarm can only be reset by the instant power disconnection.
The detector is applicable in places where fire might generate volume heat, i.e. in industrial and civil
buildings such as in the kitchen, boiler room, generator room, drying plant, and smoking room. However,
it is not suitable for places where volume smoke and low heat is generated during a fire, or a place
where a smoldering fire might occur.
II. Product features
Designed with an upper cover and a lower cover, it can be installed, debugged and maintained
conveniently.
It can monitor temperature in the workplace in real time
Non-polarity, two-bus connection that ensures convenient installation and maintenance.
III. Technical parameters
1.
Executive standard: GB4716-2005
2.
Working voltage: DC24V (allowance: DC18V ~ 30V)
3.
Working current: during monitoring <50uA @ DC 24V
In alarm mode 1mA~10mA (depends on the loop current limiting resistance)
4.
Working indicator: during monitoring, the red indicator blinks
In alarm mode: the red indicator remains on
5.
Weight: about 46g
6.
Production class: A2
7.
Exterior size: diameter: 100mm, height: 56mm(with the base)
8.
Wiring method: non-polar two-wire
9.
Operating environment: Indoor, temperature:
－
10
℃～
+50
℃
; relative humidity:
≤
95% (40
℃
±
2
℃
, without condensation)
10.
Installation height:
≤
8m
11.
Protection area: see related provisions in GB50116-98 Code for Design of Automatic Fire
Alarm System.
12.
Matched host machine: conventional switch-type fire alarm control system, or intelligent bus
fire alarm control system via a interface module.
IV. Appearance and dimensions (see Fig.1)
-2-
(Unit: mm)
Fig.1
V. Use and engineering application
1.
Fig.2 is the schematic diagram of the matched mounting base.
DZ
-9
10
K
Fig.2
Definitions of terminals(non-polarity two-wire
system):
1 – L2 Signal terminal
2 – L1 Signal terminal
3 – L1 Signal terminal
4 – No Pin
Notes
：
Terminal 2 and 3 are connected directly
inside the detector. Connecting the detector with
the controller as Fig.3, we can find the failures
caused by dismounting the detector.
2.
Wiring method:
a. Fig.3 is a schematic diagram of the connection between multiple detectors with a
conventional switch-type (current type) alarm control systems.
DZ
-9
10
K
DZ
-9
10
K
DZ
-9
10
K
Fig.3
b. Fig.4 is a schematic diagram of the connection between multiple detectors with
intelligent two-bus fire alarm control system via a interface module.
L2
L1
GND
+24V
TO+
TO-
Intelligent
two-bus fire alarm
control panel
Input module
Terminal load(4.7K)
DZ
-9
10
K
DZ
-9
10
K
DZ
-9
10
K
Fig.4
A
指示灯
Screw cover
A Indicator
