Special Features; Range Of Application - HBM VKK2R-8 Ex Bedienungsanleitung

VKK2R-8 Ex
1

Special features

Device group II, device category 2 or device category 3
− Parallel connection of max. eight load cells in a 6
− HBM's shielding design provides EMC-proofing under EN 45 501
− Corner load balancing via the integrated resistor network in the load cell output
− Degree of protection IP65 to EN 60 529
The junction box also allows the screen to be connected conventionally by means
of the screen strands. With this method, EMC-proofing under
EN 45 501 is restricted, which can lead to measurement errors when there are
electromagnetic interference fields.
2

Range of application

The junction box can be used in different zones:
The maximum permissible ambient temperature is 70 5C [158 5F].
Zone 1: II 2 G Ex ia II C T4 − type of protection "Intrinsic safety"
Intrinsically safe circuits with the following maximum values can be
connected:
U : 22 V
i
or: II 2 G Ex e II T4 − type of protection "Increased safety"
Max. excitation voltage U
Max. excitation current I
Max. power P
Cross section 1.5 mm
Zone 21 or Zone 22 (dust/air mixtures with conductive dust):
II 2 D Ex iaD A21 T 80 5C − type of protection "Intrinsic safety"
Intrinsically safe circuits with the following maximum values can be
connected:
U : 22 V
i
or: II 2 D Ex tD A21 IP 65 T 80 5C − type of protection "Explosion
proof enclosure"
Max. surface temperature 80 °C [176 °F],
Max. permissible excitation voltage 12 V.
Zone 2: II 3 G Ex nA II C T4 − type of protection "Explosion proof
enclosure"
Max. surface temperature 80 °C [176 °F],
Max. permissible excitation voltage 12 V.
Zone 22: (dust/air mixtures with non conductive dust)
II 3 D Ex tD A22 IP 65 T 80 5C type of protection "Explosion proof
enclosure"
Max. surface temperature 80 °C [176 °F],
Max. permissible excitation voltage 12 V.
A1552-4.1 en/de
I : 469 mA
i
=12 V;
max
=350 mA,
max
=4 W,
max
2
or 2.5 mm
I : 469 mA
i
wire circuit
-
Pi: 1.835 W.
2
resp. (see chapt. "5 Connection").
Pi: 1.835 W.
7
HBM