Rockwell Automation 1797-OB4D FLEX Ex 24V DC Nonisolated Source 4 Output Module - Manual (Page 23)

FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module 23
Publication 1797-5.6 - June 2011
 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
or V
t
and I
t
of the associated
apparatus are less than or equal to 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. The internal capacitances Ci of the terminal base must be taken
into account to verify the intrinsic safety.
Terminal Connections
Terminals V
t
(V) I
t
(mA) Groups C
a
( μF) L
a
( μH)
Male bus
connector 5.8 400 A to G 3.0 3.0
Hazardous (Classified) Location
Class I, Zones 0, 1, & 2 Groups IIC, IIB, IIA
Class I, Div. 1 & 2 Groups A, B, C, D
Class II, Div. 1 & 2 Groups E, F, G
Class III, Div. 1 & 2
Hazardous (Classified) Location
Class I, Zones 1 & 2 Groups IIC, IIB, IIA
Class I, Div. 1 & 2 Groups A, B, C, D
To any intrinsically safe
device or associated
apparatus with Entity
Concept  parameters of
V
oc
< 5.8V; I
sc
< 400 mA.
T o any intrinsically safe
device or associated
apparatus with Entity
Concept  parameters of
V
oc
< 9.5V; I
sc
< 1 A.
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 the table,
Wiring Method.
1797-OB4D
16
Shield connection only
50
51
35
34
V max =5.8V
I max =400mA
C i =1350nF
L i =negligible
V max =9.5V
I max =1A
C i =negligible
L i =negligible
Male Bus
Connector
 




33
40
41
42
43
44
45
0 (+)

Female Bus
Connector
1 (-)
ch0
ch1
ch2
ch3
4 (+)
5 (-)
8 (+)
9 (-)
12 (+)
13 (-)
42059
Any Simple Apparatus  or I.S.
device with Entity Concept
parameters  (V
max
, I
max
, C
i
, L
i
)
appropriate for connection to
associated apparatus with Entity
Concept parameters listed in the
table, Terminal Connections.