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KMB4 Box with Passive Safety Zener Barriers, for ATEX Environments
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.
Kit of three intrinsic protection Zener barriers, for connection of devices in ATEX area with devices in safe area, housed in an ABS box.