Rockwell Automation 1797-IJ2 FLEX Ex Frequency Input Module User Manual
Page 29
FLEX Ex Frequency Input Module 29
Publication
1797-5.9 - June 2010
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, 0.1 A, 20 J, or 25 mW.
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-IJ2, must be used with terminal base 1797-TB3 or
1797-TB3S.
Terminals 19, 30, 36, 38, 39, and 47…49 shall not be connected.
WARNING
Substitution of components may impair intrinsic safety
AVERTISSEMENT
La substitution de composant peut compromettre la securite
intrinseque.