Zener barrier Z779
Shunt safety barrier for intrinsically safe smoke detectors in the hazardous area
Characteristics
- Must be installed between the RZ-24 central unit and the intrinsically safe smoke detectors in the hazardous area
- It prevents excessive electrical energy from entering the hazardous area in the event of a fault in the non ATEX area, which could ignite explosive gases or dusts
- ATEX Certificate: BAS 01 ATEX7 005
- For its installation, there is the casing CI-K available
Product details
Technical data
Characteristics Zener barrier Z779 | 2-channel, DC version, positive polarity |
Supply voltage | max. 27 VDC |
Fuse rating | 50 mA |
Series resistance | min. 301 Ω / max. 327 Ω |
Number of ex-proof detectors that can be connected | max. 20 pieces of intrinsically safe detectors |
IP rating | IP 20 / casing IP 65 |
Operating temperature | -20 °C to +60 °C |
Dimensions Zener barrier Z779 | 12.5 x 115 x 110 mm |
Material casing CI-K | glassfiber reinforced polycarbonate, bottom black, upper part grey, RAL 9005/7035 |
Installation
Installation
The Zener barrier must be installed outside the hazardous area. Special models with pressure capsulated casings for the hazardous area are available on demand.
If there is no suitable casing available on site (with a top hat rail according to EN 50222), we offer a separate casing with IP-rating 65. The Zener barrier is simply snapped onto the top hat rail of the casing.
Order information
Order Information
Description | Part No. |
---|---|
CI-K casing, not ex-proof | 040585 |
Z779 Zener barrier, 2-channel | 040589 |
Downloads
File Name | Type |
---|---|
Documents | |
Catalog: Explosion-proof hold-open systems | |
Technical manual RZ-24 | |
DWG Drawings | |
DWG Central Unit RZ-24, 040553 | dwg |