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4. ATEX Intrinsic Safety Marking and Electrical
Safety Parameters
•
They are supplied by a certified power source* for
explosible atmospheres with the maximal
characteristics:
Ui = 16V ; Ii = 0.052A ; Pi = 0.169W.
* The power source (Control circuit) must be one
manufactured by Pepperl & Fuchs below:
WE 77/EX 1 or WE 77/EX 2
•
The wiring connection is done on one or two
terminal connector type:
2
MK 3 ; 2.5mm
; 380 volts ; manufacturer:
WEIDMULLER or equivalent product.
4.2.1.3 Maximum Characteristics
Variation
DC Source
With
AC Source
Micro-
Peak Value
switch
With Proximity Switch
4.2.2 Types 496-858 and 496-858/. :
4.2.2.1 Type 496-858:
The position transmitter is connected to a certified
linear power supply for explosible atmospheres Group
IIC, IIB or IIA and its output circuit is recognized for an
intrinsic safety used per EN 60079-11.
Maximum characteristics:
Ui (V)
Ii (A)
28
0.11
4.2.2.2 Type 496-858/. :
The additional functions of position transmitter are
identical to type 496-•58
© 2020 Baker Hughes Company. All rights reserved.
(Cont'd)
Li
Ui
Ii
Ci
(V)
(A)
(nF)
(μH) (W)
30
0.5
0
0
90
1.4
0
0
16
0.052 120
200 0.169
Ci (nF)
Li (μH)
Pi (W)
30
0
0.77
Pi
–
-
Masoneilan 496 Series Position Transmitter ATEX Instruction Manual | 9
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