Rockwell Automation 1797-PS2N2 FLEX Ex Power Supply - Manual (Page 14)

14 FLEX Ex Power Supply
Publication 1797-5.12 - June 2010
WARNING: Substitution of components may impair intrinsic safety.
AVERTISSEMENT: La substitution de composant peut compromettre la
securite intrinseque.
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
of the associated apparatus
are less than or equal to V
max
and I
max
of the intrinsically-safe apparatus and
1 and 2 Any one
channel (for
example, ch1) 11(+), 10(-) 9.5 1.0 A, B, IIC 0.5 8
C, E, IIB 1.5 32
D, F, G, IIA 4.0 64
11
1 2 3 4 5
17
16
15
14
13
12
11
10
Ch4
Ch3
Ch2
Ch1
Nonhazardous 
Location
Hazardous (Classified) Location
1797-PS2N2
Class I, Division 1, Groups A, B, C, D
Class II, Division 1, Groups E, F, G
Class III
Input
Power
Nonintrinsically 
Safe

Wiring
Intrinsically 
Safe Wiring
   

42101
 
 
  
To any IS device
with entity concept

parameters  of 
(V
max
, I
max
, C
i
, L
i
) 
appropriate for
connection to
associated

apparatus with 
entity concept 
parameters listed 
in Table 3.
12
11