Isolation type safety barrier at the operating end

1、 Overview of isolated safety barriers at the operating end:

This product is manufactured and produced in accordance with the relevant standards of GB3836.1-2000 "Electrical equipment for explosive gas environments - Part 1: General requirements" and GB3836.4-2000 "Electrical equipment for explosive gas environments - Part 4: Intrinsic safety type" i "". The explosion-proof mark is [Exib] Ⅱ CT6, and it has been inspected and approved by a quality inspection agency and obtained an explosion-proof certificate.

SWP8067-EX operation end isolation safety barrier isolates and transmits standard 4-20mA DC current signals from the safety zone to hazardous areas, driving on-site valve positioners, electric/gas converters, etc,

2、 Main technical performance of the isolated safety barrier at the operating end:

Explosion proof mark: [Exib] Ⅱ CT6

Intrinsic safety explosion-proof parameters: Uo ≤ 35V, Io ≤ 35mA, C o ≤ 0.045uF, L o ≤ 2mH, P o ≤ 0.3W Um=250VAC/DC

Safe zone input: ①②-4~20ADC

Power supply voltage: ③ ⑥ -24VDC ± 10

Dangerous area output: ⑦⑧ -4~20A.DC

Output load: 750 Ω (with 250 Ω internally)

Accuracy: ± 0.2

Power consumption: 1.5W

Environmental temperature: 5 ℃~40 ℃

Relative humidity: 35% to 85% RH

Storage temperature: -40 ℃~85 ℃

Weight: Approximately 150g

Installation location: The surrounding air should be free of corrosive media that can corrode chromium, nickel, and silver coatings.

3、 Installation precautions:

1. Isolation safety barriers should be installed in non hazardous areas.

2. The cross-sectional area of the soft copper wire leading from the isolated safety barrier to the site (hazardous area) must be greater than 0.5mm2.

The insulation strength of the connecting wire should be greater than 500V.

4. The wiring of the intrinsic safety end (marked in blue) and non intrinsic safety end circuits of the isolated safety barrier must not be connected incorrectly or confused. It is recommended to use blue as the intrinsic safety mark for intrinsically safe wires. Intrinsic safety wires and non intrinsic safety wires should be laid separately in the cable tray and protected with their own protective sleeves. The intrinsic safety side of the isolated safety barrier is not allowed to be mixed with other power sources, including power sources of other intrinsic safety circuits.

When the isolated safety barrier and primary instrument form an intrinsic safety explosion-proof system, they must be inspected and approved by an explosion-proof inspection agency. The SWP8000-EX series isolated safety barrier is provided by the National Explosion proof Electrical Supervision and Inspection Center, and the Co, Lo distribution parameters are the maximum allowable values relative to the π C level (hydrogen level). For π B level environments, this parameter can be multiplied by 3, and for π * environments, it can be multiplied by 8. When selecting cables of different specifications for transmission lines, the cable parameters themselves should be highly valued and should not exceed the specified values.

When conducting separate power on debugging of isolated safety barriers, attention must be paid to the model, power polarity, voltage level, and labeling on the wiring terminals of the isolated safety barrier shell.

7. It is strictly prohibited to use a megohmmeter to test the insulation between isolated safety barrier terminals. When checking the insulation of the system circuit, all isolated safety barrier connections should be disconnected first, otherwise it may cause damage to internal components.

8. All on-site instruments connected to isolated safety barriers shall be instruments that have undergone explosion-proof testing by relevant explosion-proof departments and obtained explosion-proof certificates.

9. If the internal module of the isolated safety barrier is damaged and needs to be repaired or replaced, it should generally be borne by the manufacturer. When users repair themselves, they should follow the relevant precautions, and the specific methods should be carried out according to the maintenance section (the maintenance of intrinsic safety instruments should be carried out within the scope described, and external maintenance should be discussed with the manufacturer). Only after maintenance can it be put back into operation.

10. The installation, use, and maintenance of isolated safety barriers should be strictly followed The relevant provisions of GB 3836.15-2000 "Electrical Equipment for Explosive Gas Atmosphere Part 15: Electrical Installation in Hazardous Areas (excluding Coal Mines)" shall be followed.

11. Products that have obtained explosion-proof certification are not allowed to replace components or structures that affect explosion-proof performance at will.