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Appendix C
ATEX approval
The terminal compartment of the 854 ATG level gauge has been ATEX approved as explosion-
proof and as being increased safe. The type of cable glands that must used:
For protection type increased safe
For protection type explosion proof
Connection requirements of optional boards
The identification label on the 854 ATG indicates whether your instrument is equipped with an
optional board with intrinsically safe measuring circuits.
XPU-2 board (i.s. option), [EEx ib] IIB
Output circuit for 977 TSI:
Max. values
Max. permissible ext. inductance
Max. permissible ext. capacitance
HCU option board, [EEx ia] IIB
Spot temperature input circuit:
Max. values
Max. permissible ext. inductance
Max. permissible ext. capacitance
HART input 1 circuit (for 762 VITO Interface):
Max. values
Max. permissible ext. inductance
Max. permissible ext. capacitance
HART input 2 circuit (for HART
Max. values
Max. permissible ext. inductance
Max. permissible ext. capacitance
GFC option board, [EEx ia] IIC
Fieldbus interface circuit
Max. values
Max. permissible ext. inductance
Max. permissible ext. capacitance
EEx e approved glands are to be used.
EEx d approved glands or conduit are to be used.
7
pressure transmitters and/or external water probe):
Installation guide 854 ATG
:
U = 21 V, I = 395 mA, P = 1.41 W
:
0.8 mH
:
1.27 µF
:
U = 23.1 V, I = 221 mA, P = 0.19 W
:
3.5 mH
:
980 nF
:
U = 23.1 V, I = 90 mA, P = 0.52 W
:
15 mH
:
1.02 µF
:
U = 23.1 V, I = 148 mA, P = 0.86 W
:
7 mH
:
1.02 µF
:
U = 24V, I = 380 mA, P = 5.32W
:
6.5 µH
:
1.8 nF
Appendix
Page 21
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