The Zener Barrier ZBA1S is the perfect solution for the connection between a weighing terminal and a weight receiver system in the ATEX ZONE. ZBA1S integrates three barriers in one, protecting the excitation line, signal and sense. This feature makes the installation easier, especially in small spaces. This saves time and money.
The Zener Barrier ZBA1S is the perfect solution for the connection between a weighing terminal and a weight receiver system in the ATEX ZONE. ZBA1S integrates three barriers in one, protecting the excitation line, signal and sense. This feature makes the installation easier, especially in small spaces. This saves time and money.

ATEX/IECEX Triple Zener Barrier For Load Cells "ZBA1S"

By Dini Argeo

The ZBA1S is a three-channel passive Zener barrier for the intrinsically safe connection of load cells in ATEX Zone 1, Zone 21, and IECEx hazardous areas. It protects the excitation, signal, and sense lines in a single hyper-compact DIN rail unit, supporting up to 4 × 350 Ω load cells. Available as a standalone barrier (ZBA1S) or pre-installed in an ATEX-certified IP65 ABS enclosure (KZBA).

Model
£320.00
Product Information

ATEX/IECEx Triple Zener Barrier for Load Cells — ZBA1S

The ZBA1S is a three-channel passive Zener barrier designed specifically for the intrinsically safe connection of load cells to weighing terminals in ATEX and IECEx hazardous areas. By integrating protection for the excitation, signal, and sense lines into a single ultra-compact DIN rail unit, the ZBA1S simplifies installation, reduces wiring complexity, and saves valuable panel space — making it the ideal barrier for Zone 1 gas, Zone 21 dust, and mining (M1) environments.

Key Features

  • Three-channel design protects the Excitation (CN3/CN6), Signal (CN1/CN4), and Sense lines simultaneously — all in one device.
  • Supports connection of up to 4 × 350 Ω load cells.
  • "SLIM" hyper-compact DIN rail enclosure — ideal for space-constrained installations.
  • Dual ATEX and IECEx certified for gas (Zone 1), dust (Zone 21), and mining (M1) applications.
  • Operating temperature range: −20 °C to +60 °C.
  • Available as a standalone barrier (ZBA1S) or pre-installed in an ATEX-certified ABS enclosure with 4 certified cable glands (KZBA).

ATEX / IECEx Marking

  • ATEX: II (1)G, II (1)D, I (M1)
  • IECEx: <Ex ia Ga> IIC, <Ex ia Da> IIIC, <Ex ia Ma> I
  • Temperature range: −20 °C ≤ Tamb ≤ +60 °C

Electrical Ratings

  • CN3 (Excitation): 14 Vrms differential, 8 Vrms through earth
  • CN1 & CN2 (Signal / Sense): 20 Vrms
  • Maximum Security Voltage (Um): 250 Vrms
  • Maximum Security Current (interruption capability): 1,500 A
  • Degree of protection: IP20 (barrier only)

KZBA Enclosure Option

  • Material: ABS
  • Cable glands: 4 × ATEX-certified glands included
  • Gas protection: ATEX II 3(1) Ex nAa <ia Ga> IIC T4 Gc (−20 °C ≤ Ta ≤ +50 °C)
  • Dust protection: ATEX II 3(1)D Ex tb <ia Da> IIIC T130 °C Dc IP65 (−20 °C ≤ Ta ≤ +50 °C)

Note: Combined use of one or more Zener barriers classified (1)GD <Ex ia> requires the overall barrier set marking to be upgraded to (2)GD <Ex ib> in accordance with EN 60079-14.
Specification

Certification & Marking

  • ATEX: II (1)G, II (1)D, I (M1)
  • IECEx: <Ex ia Ga> IIC, <Ex ia Da> IIIC, <Ex ia Ma> I
  • Ambient temperature: −20 °C ≤ Tamb ≤ +60 °C

Electrical Ratings

  • CN3 Excitation: 14 Vrms differential | 8 Vrms through earth
  • CN1 & CN2 Signal / Sense: 20 Vrms
  • Maximum Security Voltage (Um): 250 Vrms
  • Maximum Security Current: 1,500 A

Load Cell Compatibility

  • Maximum load cells: 4 × 350 Ω
  • Channels: 3 (Excitation, Signal, Sense)

Enclosure & Installation (ZBA1S)

  • Type: SLIM hyper-compact DIN rail
  • Degree of protection: IP20
  • Weight: 2 kg
  • Operating temperature: −20 °C to +60 °C
  • Storage temperature: −25 °C to +70 °C

KZBA Enclosure Option

  • Material: ABS
  • Cable glands: 4 × ATEX-certified
  • Gas: ATEX II 3(1) Ex nAa <ia Ga> IIC T4 Gc | −20 °C ≤ Ta ≤ +50 °C
  • Dust: ATEX II 3(1)D Ex tb <ia Da> IIIC T130 °C Dc IP65 | −20 °C ≤ Ta ≤ +50 °C

Standards & Compliance

  • EN 60079-14 (Electrical installations in hazardous areas)
  • ATEX Directive compliant
  • IECEx certified
Downloads


For full technical details, please download the ZBA1S Datasheet.
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