Table 1, Table 2 – Rockwell Automation 1797-IBN16 FLEX Ex NAMUR Input Module User Manual
Page 18
18 FLEX Ex NAMUR Input Module
Publication
1797-5.7 - March 2010
• CSA C22.2 No. 30-M1986, Explosion-Proof Enclosures for Use in
Class I Hazardous Locations
• CSA-E79-0-95, Electrical Apparatus for Explosive Gas Atmospheres,
Part 0: General Requirements
• CSA-E79-11-95, Electrical Apparatus for Explosive Gas
Atmospheres, Part 11: Intrinsic Safety “i”
• CSA C22.2 No. 14-95, Industrial Control Equipment
Table 1
Wiring Methods
• Wiring method 1 - Each channel is wired separately.
• Wiring method 2 - Multiple channels in one cable, providing each
channel is separated in accordance with the National Electric Code
(NEC) or Canadian Electric Code (CEC).
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.
Wiring
Method
Channel
Terminals
V
oc
(V)
I
sc
(mA)
V
t
(V)
I
t
(mA)
Groups
C
a
(
μF) L
a
(mH)
1 and 2
Any one
channel (for
example,
ch0)
0(+), 1(-)
14.5
15
-
-
A, B
0.3
80.0
C, E
0.9
320.0
D, F, G
2.4
640.0
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