26
FLEX Ex 24V dc Non-Isolated Source 4 Output Module
Publication
1797-5.6 - December 2003
!
The entity concept allows interconnection of intrinsically safe apparatus
with associated apparatus not specifically examined in combination as a
system when the approved values of V
oc
and I
sc
or V
t
and I
t
of the associated
apparatus are less than or equal to V
max
and I
max
of the intrinsically safe
apparatus and the approved values of C
a
and L
a
of the associated apparatus
are greater than C
i
+ C
cable
and L
i
+ L
cable
respectively for the intrinsically safe
apparatus.
&
Simple apparatus is defined as a device which neither generates nor stores
more than 1.2V, 0.1A, 20
µ
J, or 25mW.
$
Wiring methods must be in accordance with the National Electric Code,
ANSI/NFPA 70, Article 504 and 505. For additional information refer to
ANSI/ISA RP12.6.
#
This module, 1797-OB4D, must be used with terminal base 1797-TB3 or
1797-TB3S.
"
Terminals 2, 3, 6, 7, 10, 11, 14, 15, 17-32, 36-39, and 46-49 shall not be
connected.
%
WARNING: Substitution of components may impair intrinsic safety.