Rockwell Automation 1797-IJ2 FLEX Ex Frequency Input Module - Manual (Page 24)

24 FLEX Ex Frequency Input Module
Publication 1797-5.9 - June 2010
Table 2
 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
t
and I
t
of the associated apparatus are
less than or equal to V
oc
and I
sc
or 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. The internal capacitances Ci of the terminal base must be taken
into account to verify the intrinsic safety.
 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 Electrical
Code, ANSI/NFPA 70, Article 504 and 505 or the Canadian Electrical Code
CSA C22.1, Part 1, Appendix F. 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.

Terminals V
t
(V) I
t
(mA) Groups C
a
(
F)
L
a
(
H)
Male Bus Connector 5.8 400 A-G 3.0 3.0
WARNING
Substitution of components may impair intrinsic safety
AVERTISSEMENT
La substitution de composant peut compromettre la securite
intrinseque.
IMPORTANT
For detailed certification information, refer to the FLEX Ex System
Certification Reference Manual, publication 1797-6.5.6