Tork GA 21, Руководство пользователя

Страница: 8 / 18

Figure 1. General View of the Device
Figure 2: Relay Type
SMS-TORK Endüstriyel Otomasyon Ürünleri San. Tic. Ltd. Şti.
8
2.4. General View
The figure given below is given to inform the user about the structure of the device. It is produced in two
according to their features. is that there is no relay and buzzer in the non-relay type. The electrical-electron-
ic and mechanical components of the GA21 gas alarm device are given in Figure 1, Figure 2 and Figure 3.
DEFINITIONS
DEFINITIONS
Body
Electronic Card
Cover
Cover Opening Place
ExProof Icon
Cover Fixing Screw
Label Fixing Screw
Label
Sensor Housing Cover
Sintered Filter(IP55)
Sensor
Sensor Housing Connector
Body Fixing Leg
Stopper
Ground Screw
Cable Entry Connector
Electronic Card Fixing Screw
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
The electronic card image of the GA21 series gas alarm detectors with relay is given in the figure below.
Here, the electronic card structure and electrical-electronic components are defined. It is recommended
that the user be familiar with these components and technical specifications. (See 2.6. Technical
specifications Table 3) When valves, sirens or other systems are connected to the relay contacts, the
current value that can pass through the contacts must be taken into account. In case of connecting systems
that draw excessive current, it may cause unexpected possible malfunctions in the relay or components on
the electronic board. At the same time, Low level adjustment can be made with ZERO trimpot and High
level adjustment can be made with SPAN trimpot. Alarm trimpot is also used to determine the alarm level of
the device. According to the gas density in the environment, it can be monitored with the analog signals
produced by the devices or it can control the systems it is connected to. When the output signals reach the
alarm level, it gives an audible alarm with a buzzer.
2.4.1. Relay type electronic board
Signal Output
Supply Voltage
Supply Voltage
Relay Contact (NC)
Relay Contact (COM)
Relay Contact (NO)
Alarm Level Adjustment Trimpot
Buzzer
Sensor Socket
Fixing Holes
Span Trimpot
Zero Trimpot
Output Signal Selection Table
Signal Selection Switch 1
Signal Selection Switch 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
In the picture below, the components of the relayless type GA21 gas alarm device electronic card are
given and defined according to their functions. It can give more than one different output control signal.
The user can adjust the low and high sensitivity settings with the zero and span trimpots, and the output
control signal can be selected from Table 2 with the signal selection switches.
2.4.2. Non-relay type electronic board
4
1
2
3
6
7
8
9
10
11 12
13
14
15
16
17
5
1 2 3 4 5
6
7
8
9
10
11
12
13
14
15