Rockwell Automation 1797-IBN16 FLEX Ex NAMUR Input Module - Manual (Page 23)

FLEX Ex NAMUR Input Module 23
Publication 1797-5.7 - March 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
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. 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 μJ, 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-IBN16, must be used with terminal base 1797-TB3
or 1797-TB3S.
Terminals 36 to 39, and 46 to 49 shall not be connected.
Terminals V
t
(V) I
t
(mA) Groups C
a
( μF) L
a
( μH)
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.