Rockwell Automation 1797-XXX FLEX Ex System Certification Reference Manual - Manual (Page 135)

Publication 1797-6.5.6 - June 2005
1797-IE8NF FLEX Ex 8 Input Analog Module with Noise Filter 28-3
UL, C-UL I/O Entity
Parameters 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 1: Entity Values for Field Device Connections
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
e.g. ch0
0(+), 1(sig) 23.7 92.5 - - A, B, IIC 0.06 2.0
C, E, IIB 0.18 8.0
D, F, G, IIA 0.48 16.0
1(sig), 2(-) 5 1.0 - - A, B, IIC 100 1000
C, E, IIB 300 1000
D, F, G, IIA 800 1000
0(+), 1(sig), 2(-) - - 23.7 93.5 A, B, IIC 0.06 2.0
C, E, IIB 0.18 8.0
D, F, G, IIA 0.48 16.0
IMPORTANT
A terminal base may or may not have an I/O module
installed.
1797- IE8NF Allen-Bradley
B - A
7 PWR 0 1 2 3 4 5 6
3
8 CHANNEL ANALOG INPUT NOISE FILTER
FLEX Ex Analog
Input I/O Module
LEDs
Female Bus
Connection
Field Wiring
Terminals Terminal
Base
Terminal
Base Key
Male Bus
Connection
Key Position for
Terminal Base
Insertion
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