KMB4 Box with Passive Safety Zener Barriers, for ATEX Environments
Standard Features
Marking of single barrier:
- ATEX II (1) GD [Ex ia Ga] IIC [Ex ia Da] IIIC
Marking of the whole box with three Zener barriers:
- ATEX II 3(1)G Ex nA [ia Ga] IIC T4 Gc (-20°C ≤ Ta ≤ +40°C) for gas
- ATEX II 3(1)D Ex tb [ia Da] IIIC T130°C Dc IP65 (-20°C ≤ Ta ≤ +40°C) for dust
Single Channel:
Barrier for signal and sense: Um=250V
Fuse: 50mA
Uo: 17,4V
Io: 25mA
Po: 0,11W
Co: 0,346µF
Lo: 56,88mH
Rmin: 705,6Ohm
Barrier for supply: Um=250V
Fuse: 100mA
Uo: 24V
Io: 164mA
Po: 0,98W
Co: 0,125µF
Lo: 1,32mH
Rmin: 147Ohm
NOTES:
- Connection with up to 4 load cells of 350 ohm each.
- The combination of two or more Zener barriers (1) GD [Ex ia] implies that the Atex marking of the barriers assembly must be update to (2) GD [Ex ib], as required by the EN 60079-14 standard.
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WARNING The KMB4 kit can be placed in ATEX zone according to its ATEX marking or in alternative in a safe area. |
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The electric coordination, executed for realizing the DCATEXMB4 certificate, involves the use of the LCCB/EXCB6 cable, maximum length of 200m (greater lengths upon price estimate). |
Kit of three intrinsic protection Zener barriers, for connection of devices in ATEX area with devices in safe area, housed in an ABS box.
Installation examples
Dini Argeo non Atex indicator and KMB4 box in safe area, connected to the Dini Argeo ATEX platform in hazardous area. The system is provided with declaration of ATEX conformity (code DCATEXMB4).
DFWATEX3GD Dini Argeo indicator and KMB4 box in ATEX 2 & 22 areas, connected to the Dini Argeo ATEX platform in ATEX 1 & 21 areas. The system is provided with declaration of ATEX conformity (code DCATEXMB4).
Parts
| Part # | Description |
|---|---|
| Available versions | |
| KMB4-1 | Kit of 3 ATEX Zener barriers for load cells, in an ABS box. For up to 4 load cells of 350 ohm, for intrinsic protection weighing systems in a dangerous area. Marking of the whole box with three Zener barriers: ATEX II 3(1)G Ex nA [ia Ga] IIC T4 Gc (-20øC = Ta = +40øC) for gas, ATEX II 3(1)D Ex tb [ia Da] IIIC T130øC Dc IP65 (-20øC = Ta = +40øC) for dusts. Provided with safety instructions and the ATEX EU declaration of conformity (EN and IT). |
| ZBPW | Intrinsic protection Zener barrier for load cell supply, for mounting on DIN bar in a safe area, or in a hazardous-proof case. Marking: ATEX II (1) GD [Ex ia Ga] IIC [Ex ia Da] IIIC. |
| ZBSG | Intrinsic protection Zener barrier for load cell signal, for mounting on DIN bar in a safe area, or in a hazardous-proof case. Marking: ATEX II (1) GD [Ex ia Ga] IIC [Ex ia Da] IIIC. |
| ZBSN | Intrinsic protection Zener barrier for load cell sense, for mounting on DIN bar in a safe area, or in a hazardous-proof case. Marking: ATEX II (1) GD [Ex ia Ga] IIC [Ex ia Da] IIIC. |
Options
| Part # | Description |
|---|---|
| Options only available at time of order | |
| DCATEXMB4 | ATEX declaration for the whole system with Dini Argeo Zener barriers. Ex II 2G IIC T6 Gb X e Ex II 2D IIIC T125øC Db X system, with label of the whole system, for weight indicator connected to Dini Argeo zener barriers, connected to a mechanical structure with ATEX load cells (each cell must be certified with CCATEX option). Provided with descriptive document of the assembly and ATEX EU declaration of conformity of the assembly (EN and IT). |
| LCCB | Shielded cable 6x0.25 mmý (suitable for Ex zones). PVC inner sheath. Tinned copper braid shielding. PVC outer sheath, diameter 5.8 mm. Temperature range: -40 / +80 øC. Minimum bending radius >/= 6 x O.D. _/m |
| LCCBA | Armoured cable 6x0.25 mmý (suitable for Ex zones). PVC inner sheath, diameter 5mm. Iron-zinc alloy armour. Transparent PVC outer sheath, 8 mm diameter. Temperature range: -15 / +70 øC. Minimum bending radius >/= 5 x O.D. _/m |