Intelligent safety grid

Products overview:
ZW series of GLAHave detection side safety barrier and the operation and safety gate two types.Testing the security gate with two wire system transmitter use;Operation side safety gate using matched with electrical converter or electrical valve.There are news input types, such as isolation type safety barrier.Because the isolation type safety barrier used pressure limiting, current limiting, the way such as isolation, not only can prevent risk energy from the terminal into the risk site and improve the system of the explosion-proof function, and also increase the system anti-interference ability, greatly improving the system reliable.

Second,Working principle:

The principle of testing end isolation type safety barrier is:
1, will be on this Ann energy limit circuit module circuit input current or voltage signal into a VDC, 0.2-1 into the module after the acquisition, amplification, computing and anti-interference treatment;
2, the current and voltage signal output isolation transformer to create, for the back of the secondary instrument, or other instrument to use.Output module also need a separate 18.5 ∽ voltage is 28.5 VDC.
3, using the energy limitation circuit as a two wire system supply voltage transducer work.This Ann energy limit circuit can limit risk of heavy current or high voltage signal into the dangerous scene.
The principle of operation side isolation type safety barrier is:
1, the regulator or the operator output of 4-20 ma DC signal output again after isolation of 4-20 ma DC signal;
2, using the energy limitation circuit supply electrical converter or electrical valve positioner field use.
3, this Ann energy limit circuit to limit risk of heavy current or high voltage signal into the dangerous scene.
Applications:
ZW series of GLAIntelligent safety barrier in addition to the general function, can also support to logical processing of signal, the state set up alarm output, chip for the function of the isolator has brought the revolutionary progress, broaden the application range of the isolator.With unit combination instrument and DCS, PLC systems, such as in oil field, electric power, metallurgy, petrochemical, manufacture industry has been widely applied in major projects.
Four, the main features:
1, the Ex ia Ⅱ explosive-proof grade C, can be used to 0 area for the dangerous sites and dangerous medium;
2, triple redundant circuit design;
3, input/output signal and power three port isolation;
4, high isolation voltage;
5, terminals can take electric plug, convenient for installation and maintenance;
6, high conversion accuracy;
7, high density installation and improve systems integration;
8, DIN rail independent installation;
9, support two-way HART and Brian protocol communication;
10, no grounding.
Five, the technical parameters:
General technical parameters, please refer to the manual to "general technical indicators.
Explosion-proof marks: Ex Ⅱ C (ia)
Input/output precision: plus or minus 0.2% x F.S
Danger zone allows input signals:
Dc voltage: 0 to 5 v, 1, 0 to 10 v to 5 v
Input impedance: 500 k Ω
Signal types and range in order to determine, is available programming *, but when choosing 0 to 10 v input cannot choose other type of input voltage.
To the safety output signals:
Dc: 0-10 ma, 4-20 ma, 0 to 5 v, 1-5 v, 0 to 10 v
Signal types and range in order to determine, programming * is available.
Communications (only in the safety zone) : RS232 / RS485 interface, see this manual communication technology.When the user with a communication function without the second function, of output.
Power supply: dc 24 v
Power consumption:
1.9 W (single road 20 ma output, when the power is 24 v
2.4 W (dual 20 ma output, when the power is 24 v
Overall dimensions
High wide x x: 22.5 x 100 x 115 mm deep
National instruments explosion-proof safety supervision and inspection certification parameters: (9, 10) between terminals Uo = 15 v, ma Io = 1. Co = 0.58 u F, Lo = 1000 mh
Scope of application:
From the transmitter, an instrument and secondary instrument of dc voltage signal.
The installation, please attend the appearance and installation of this manual.
Calibration:
This product USES intelligent digital design, which can ensure the accuracy of within the scope of the provisions of this manual.For calibration please equipped with dedicated programmer (budget).
Six, install and use notice:
1, isolation type safety barrier shall be installed in the dangerous places.
2, isolation type safety barrier for the dangerous sites () to the scene of the soft copper conductor cross-sectional area must be greater than 0.5 was.
3, connecting wire insulation strength is greater than 500 v.
4, the isolation type safety barrier this AnDuan blue (tags) and non AnDuan circuit wiring, may not be wrong and confusion.The Ann lead appropriate chooses blue as the tag.In the wire and the wire Ann in hui trough shall be laid separately and use their protective casing.Isolation type safety in the side of the gate, there are not allowed to confuse other power supply, including other safety circuit of the power supply.
5, isolation type safety barrier and an instrument of the Ann safety explosion protection system, must be approved by explosion-proof inspection institutions designated by the state.Shenyang pine ning isolation type safety barrier by national explosion-proof electrical supervision and inspection center, the given Co, Lo distribution parameter is relative and Ⅱ grade C (hydrogen) zui big value for Ⅱ B environment can turn the parameter multiplied by 3, for Ⅱ grade A environment can turn the parameter multiplied by 8.When choosing different specifications of cable transmission lines, cable parameters should be attached great importance to its itself, shall not exceed the specified value.
6, to separate isolation type safety grid electricity debugging, must pay attention to safety barrier isolation type model, the power polarity, and isolation type safety grid shell terminal voltage level on the label.
7, it is forbidden to use test isolation by megger insulation between the security gate terminal.If you want to check the system line insulation, should first disconnect all isolation type safety grid connection, otherwise it will cause damage of the internal components.
8, all connected to isolate safety barrier, field instruments shall be the relevant department of explosion-proof explosion-proof test and flame-proof certification of the instrument.
9 internal modules, such as isolation type safety barrier damage in need of repair or replacement, in principle, shall be borne by the manufacturer.When users to maintenance, should be in accordance with the relevant matters needing attention, specific methods shall be carried out in accordance with the maintenance section, please (intrinsically safe instrument maintenance is limited to the range of its maintenance should consult with factory).Repair the rear can back in operation.
10, isolation type safety barrier shall strictly comply with the installation, use and maintenance. 3836.15 GB - 2000 "explosive gas environment with electrical equipment parts: 15 for the dangerous sites electrical installation (except coal)," the relevant provisions.Obtains the flame-proof certification of the product, not allowed to change the influence element of explosion-proof or structure.
Seven, selection of key points:
1, to ensure that the system work is normal, need according to the parameters of the system, determine the parameters of safety barrier, zener safety barrier mainly the working voltage, zui high working voltage, resistance and other parameters, can achieve the precision of the isolated safety barrier depends mostly.Zener safety barrier or isolation, of course, safety barrier, after also to consider the work environment, such as temperature, humidity, and whether the installation is convenient for installation and so on.
2, according to the need of explosion-proof area, area is 0, 1 or 2 area, to determine the need to reach the grade of explosion-proof, zui after is can be determined by the level of ia or ib level security gate.
Eight, selection table:

Description:
Input type and the corresponding output range. When ordering, please indicate.If users need to programming, please choice the company provided the special programmer, operation method, please see the manual programming and calibration technology of the products.

After-sales service commitment:
1, our company sold by weiSecurity gate seriesProduct quality problem within 12 months, responsible for free maintenance.
2, the warranty period, any quality problems such as the products of our company, my company is responsible for free repair or replacement.
3, the warranty period, such as user improper use, damaged products, my company is responsible for the maintenance, charge damage parts cost.
4, after the warranty period appear quality problem, my company is responsible for the maintenance, charge damage parts cost.
5, such as user need to my company site services, to users in the province I company service personnel to reach the site within 12 hours, fujian association of foreign languages and user reach the site within 48 hours.