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Zener barrierThis is the latest product launched by our company, manufactured and produced in accordance with the relevant provisions of GB3836.1-2000 [Electrical Equipment for Sexual Gas Environments Part 1 General Requirements] and GB3836.4-2000 [Electrical Equipment for Sexual Gas Environments Part 4 Intrinsic Safety Type "i"]. The product has passed the national level instrument and meter explosion-proof safety supervision and inspection station (NEPSI) explosion-proof testing and obtained the explosion-proof qualification certificate.
This series has multiple different models and specifications, which can be used with various on-site instruments such as smart transmitters for digital communication, ordinary transmitters for 4-20mA analog signals (domestic DDZ-III type transmitters), electrical converters, electrical valve positioners, various thermocouples, switches (contacts and analog switches), flow instruments (flow transmitters such as turbines, waist wheels, scrapers, vortices, etc.), solenoid valves, and various special instruments to form an intrinsic safety explosion-proof system. It is used for automation process control in modern industry and is widely used in fields such as petroleum, chemical, pharmaceutical, and shipbuilding.
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 TECHNICAL INDEX
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Explosion proof mark:
Maximum safe zone voltage:
Leakage current:
Terminal color code:
Continuous operating temperature:
Storage temperature:
Relative humidity:
Installation location:
Weight:
Installation and grounding:
Installation size:
External dimensions:
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Ex (ia) IIC, Ex (ia) IIB
250V DC/AC
<10μA
The label plate for the non local safety end (safety zone, terminal wiring numbers 1 and 2) is yellow.
The label plate for this safety end (danger zone, terminal wiring numbers 3 and 4) is blue.
-20～60℃
-40～80℃
5～95%RH
security zone
About 130g
Install and ground through two integrated M4 × 9 aluminum tin coated steel fixing bolts and stainless steel self-locking nuts (provided with the product).
11.5mm (distance between hexagonal bolts)
Length x Width x Height=93.5 x 61.5 x 15 (mm)
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term
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1. Safety parameters
The safety description of a safety barrier, such as 10V 50 Ω 200mA, refers to the highest voltage, minimum terminal resistance value, and corresponding maximum short-circuit current of the terminal connected to the Zener diode or forward diode when the fuse is blown. It represents the fault energy that can be generated in hazardous areas, not the operating voltage and terminal resistance.
2. Terminal resistance
The resistance between two terminals of a safety barrier channel at 20 ℃, which is the sum of the resistance value and the fuse resistance value. If there is a diode or transistor in the circuit, the voltage drop caused by the conduction of the diode or transistor should be added.
3. Working voltage
At 20 ℃, when the terminal of the safety barrier danger zone is open and the leakage current value is less than the specified value, the maximum stable voltage with suitability level is applied between the safety zone terminal of the basic safety path and the ground.
4. Maximum voltage
At 20 ℃, the maximum stable voltage with suitable level is continuously applied between the safety terminal of any path of the safety barrier and the ground without the fuse being blown. For basic safety barriers, this value refers to the maximum voltage supplied to the safety barrier decreasing when current flows into the danger zone under the condition of an open circuit at the terminal of the danger zone. Most of the communication paths for basic safety barriers and overvoltage protection safety barriers are applicable.
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External dimensions
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Technical Parameter
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Functional serial number
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working voltage
（V）
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end resistance
（Ω）
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Explosion proof parameters
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Circuit diagram
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Typical Uses
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Uo
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Io
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Dangerous Zone, Safe Zone
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11
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6
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50
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10
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200
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DC6V, AV power supply
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11P
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6
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33
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10
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300
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12
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12
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100
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15
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150
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DC12V, AC9V power supply
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12P
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12
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50
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15
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291
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13
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24
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300
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28
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93
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Two wire transmitter
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13P
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24
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234
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28
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119
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21
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0.6
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10
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3
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300
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thermal resistance
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22
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12
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130
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14
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114
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23
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0.6
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10
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3
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300
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Three wire heating resistor
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24
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6
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50
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10
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200
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Thermocouples, AC/DC sensors
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31
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24
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300
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28
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93
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Two wire transmitter
switch
Controller Output
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31R
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24
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300
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28
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93
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31P
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24
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234
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28
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119
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31RP
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24
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234
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28
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119
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32
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24
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300
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28
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93
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Transmitter
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6
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50
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10
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200
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32R
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24
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300
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28
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93
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10
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50
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10
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200
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41
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24
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110
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28
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60
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Gas alarm power supply
Power supply system for switches and solenoid valves
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41P
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10
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110
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12
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30
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51
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10
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1000
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12
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12
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Strain bridge pier road return signal
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52
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10
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150
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12
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80
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Strain bridge power supply
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52P
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10
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75
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12
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157
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Note: Product type
WP6131- Thermistor Zener Safety Barrier
WP6132- Thermocouple Zener Safety Barrier
WP6133- Current Input Zener Safety Barrier
Wp6135- Current output Zener safety barrier
Wp6137- Voltage output Zener safety barrier
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practical application
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1thermocouple
answerthermocoupleSignal, NPDMN type safety barrier is selected, which is a dual path non-polar safety barrier with an internal resistance of 50 Ω+50 Ω. To eliminate
The impact of environmental temperature on measurement accuracy should be compensated by connecting the compensating wire to the secondary instrument and performing cold end compensation there.
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2thermal resistance
thermal resistanceWhen measuring temperature, HR-WP6131-21-QEX safety barrier (dual channel) or HR-WP6131-23-QEX safety barrier (three channel) can be used
Provide two wire or three wire protection for the thermistor, with an internal resistance of 10 Ω for both. During normal operation, the leakage current is less than 1 μ A, which does not affect the measurement accuracy.
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3. Transmitter
When the transmitter is connected to the safety barrier and the power supply voltage fluctuation of the transmitter is small, HR-WP6133-31-QEX or HR-WP6133-32-QEX type should be selected
Safety barrier. HR-WP6133-31-QEX can provide a voltage of 13V to the transmitter at 20mA. High power safety barrier can provide a power supply voltage of 15V at 20mA.
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4. Analog output
·The output circuit is collector output
HR-WP6135-13-QEX safety barrier is selected, which can provide dual line protection with an internal resistance of 300 Ω.
·The output circuit is the emitter output
HR-WP6135-31-QEX safety barrier is selected, which can provide dual line protection with an internal resistance of 300 Ω.
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5. Electromagnetic valve
Low power equipment or passive switches such as solenoid valves, alarms, and light-emitting diodes (LEDs) should use HR-WP6137-31-QEX or HR-WP6137-41-QEX safety barriers.
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6. Strain bridge
Strain bridge is widely used in various weighing systems. When forming an intrinsic safety system with Zener barriers, two or more Zener safety barriers are generally selected. Use HR-WP6137-51-QEX for signal reception and HR-WP6137-52-QEX for power supply.
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Installment and use
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On site instruments
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power supply
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Equipped with Zener safety barrier
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Stable (V)
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Fluctuations (V)
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passage
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model
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thermocouple
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— —
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— —
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two
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24
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thermal resistance
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— —
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— —
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two
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21, 22
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— —
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— —
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three
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23
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4-20mA
Two line intelligent transmitter
4-20mA
Two line ordinary transmitter
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24
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23-25
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one
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13
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13P
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24
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23-25
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two
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31
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31P
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31R
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31RP
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32
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32R
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Regulator output
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Emitter output
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24
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— —
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one
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13
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13P
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Collector output
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two
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31
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31P
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Single control solenoid valve, alarm
LED lights, passive switches, relays
Electrical appliances, proximity switches, etc
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24
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— —
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one
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13
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13P
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41
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41P
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Weighing transducer
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10
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23-25
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two
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51
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10
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23-25
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52
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Installment and use
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Zener safety barrier is a key instrument that plays a safety protection role in intrinsic safety explosion-proof systems. Improper installation and commissioning can cause damage to the Zener safety barrier. Before installing and commissioning the Zener safety barrier, please read the relevant regulations in this manual carefully, and strictly follow the following precautions during installation and commissioning.
1. Zener safety barriers are installed in safe areas (non hazardous areas).
2. The Zener safety barrier adopts a busbar installation method;
a. The busbar is made of copper plate with a thickness greater than 3mm, a width of 25mm, and a length selected according to the number of Zener safety barriers;
b. The busbar must be connected to the "OV" of the power supply to ensure that it is at the "OV" level;
c. When installing busbars, they must be insulated from the casing, and all busbars must be connected to each other with wires or cables. The cross-sectional area of the wire or cable core must be greater than 4-6mm2 copper wire;
d. The total grounding resistance of the safety barrier must be less than 1 Ω.
3. The wiring of the intrinsic safety circuit and non intrinsic safety circuit of the Zener safety barrier must not be connected incorrectly or confused.
4. When conducting a separate power on inspection of the Zener safety barrier, attention must be paid to the model of the Zener safety barrier, the polarity of the power supply, the voltage level, and the terminal numbers indicated on the casing to prevent misconnection.
5. It is prohibited to use a megohmmeter to measure the insulation between the terminals of the Zener safety barrier. When checking the insulation of the system circuit, all external connections of the Zener safety barrier should be disconnected first, otherwise it may cause the internal fuse of the Zener safety barrier to burn out.
6. It is prohibited to use the ground wire of the Zener safety barrier for welding and other strong current operations, in order to avoid causing a large number of Zener safety barriers to burn out at the same time.
7. When selecting secondary instruments, it is necessary to confirm that the operating voltage of all secondary instruments connected to the safety barrier or the maximum voltage that may be generated internally does not exceed the maximum allowable voltage of 250VDC/AC for the Zener safety barrier.
8. During system debugging, all wiring of the safety barrier should be disconnected. After confirming successful system debugging, the safety barrier wiring should be connected and put into use.
9. Be sure to pay attention to the wiring methods and limitations of connecting wires for intrinsically safe circuits:
a. Intrinsic safety circuits and non intrinsic safety circuits must be laid separately in cable trays and protective pipes;
b. The wire used for this safety end is blue;
c. The insulation strength of the connecting wire should be greater than 500V;
d. Thermocouple leads should use compensating wires;
e. When the Zener safety barrier, primary instrument, and wiring form an intrinsic safety explosion-proof system, the maximum allowable load parameters Ca and La of the Zener safety barrier are given by the explosion-proof testing agency. When selecting cables of different specifications for transmission wires, the cable parameters themselves (given by the cable factory) should be given full attention and should not exceed the specified values.
10. In addition to following this manual, the installation, use, and maintenance of safety barriers must also strictly comply with the relevant provisions of GB3836.15-2000 "Electrical Installation in Hazardous Areas" standard.
Attention: The explosion-proof regulations stipulate that once the Zener safety barrier is damaged, it cannot be repaired or reused and should be replaced.
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【sellafterclothesaffairbearNuo】
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◆Through the various products sold by our company, we guarantee to provide sales of products and spare parts at the same price within two years,And provide corresponding technical support free of charge according to the requirements of the demander.
◆Our company is responsible for free maintenance and technical support, as well as skill training for the customer's employees, in case of any quality issues with the products provided within one year (excluding vulnerable parts or accessories).
◆Due to quality issues with the products provided by our company, it has been verified by our technical department,The company will dispatch professional technical personnel to the site to handle the problem to customer satisfaction (domestic)72Hours, Jiangsu, Zhejiang, Shanghai48Arrive at the scene within hours),Technical support is available6Respond within hours.
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