Rockwell Automation 1797-IBN16 FLEX Ex NAMUR Input Module - 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