Atex Explosion Protected Triple Zener Barrier Zener3

a) ATEX Triple Zener Barrier Zener3

The perfect solution for the connection between a weighing terminal and a weight receiver system in the ATEX ZONE. Zener3 integrates three barriers in one and protects the excitation line, signal and detection. This feature makes installation easier, especially in confined spaces. This saves time and money.

• Three channels of passive zener barrier for power, reference and signal. Ex marking: ATEX II (1)G, II (1)D, I (M1) IECEx [circuit(s) in zone 0/1/2].
• Protection: [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I (-20 °C ≤ Tamb ≤ +60 °C)
• Equipped with 3 channels for the protection of the signal line (CN1/CN4), the excitation line (CN3/CN6) and the sense line, for improved signal stability.
• Housing type “SLIM”, iper-compact, for DIN rail mounting.
• Operating temperature: -20°C ÷ +60°C.
• Storage temperature: -25°C ÷ +70°C
• Rating: 14Vrms differential and 8Vrms through ground for CN3 connector, 20Vrms for CN1 & CN2
• Maximum protection voltage (Um): 250Vrms
• Maximum protection current (power interruption capability): 1500A
• Degree of protection: IP20
• Excitation, signal and detection marking: ATEX II (1)G, II(1)D, I(M1)
• Protection: [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I (-20°C ≤ Tamb ≤ +60°C)

NOTE
Up to 4 Load Cells of 350 Ohm can be connected.
Combined use of one or more Zener barriers (1) GD [Ex ia], means that the Atex marking of the set of barriers must be upgraded (2) GD [Ex ib], as described in standard EN 60079- 14.

b) ATEX Triple Zener Barrier Zener3 in ABS housing

• For intrinsically safe weighing systems in a hazardous area.
• Dimensions 179 x 359 x 166.5mm.
• Connections up to 8 load cells of 350 Ohm.
• Enclosure marking + Zener3 Barrier: ATEX II 3(1)G Ex nA [ia Ga] IIC T4 Gc X for gas, ATEX II 3(1)D Ex tc [ia Da] IIIC T135°C Dc IP66 X for dust.
• Provided with safety instructions and the ATEX EU declaration of conformity (English).

Scale types: Atex single weighing components