Rockwell Automation 1797-XXX FLEX Ex System Certification Reference Manual - Manual (Page 196)

Publication 1797-6.5.6 - June 2005
43-2 1797-OB4D FLEX Ex 24V dc Non-Isolated Source 4 Output Module
Intrinsically Safe
Specifications For a full list of specifications, refer to FLEX Ex 24V dc Non-Isolated Source
4 Output Module Installation Instructions, publication 1797-5.6.
FM 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).
Table 1: Entity Values for Field Device Connections
Operating Temperature -20 to +70 o C (-4 to +158 o F)
Agency Certification Class I Division 1 Groups A-D T4
Class I Zone 1 AEx ib/[ia] IIC T4
Certificates FM Certificate Number 3009806
FM
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(-) 27.4 110.0 - - A, B, 0.105 3.0
C, E 0.315 9.0
D, F, G 0.840 24.0
IMPORTANT
A terminal base may or may not have an I/O module
installed.
1797- OB4D Allen-Bradley B - A
0 1 2 3 4 5 6 7 PWR
7
4 Point Source Output Module
FLEX Ex Discrete
Output I/O Module
LEDs
Female Bus
Connection
Field Wiring
Terminals Terminal
Base
Terminal
Base Key
Male Bus
Connection
Key Position for
Terminal Base
Insertion
42058