Emerson 2400S User Manual
Installation Manual
25
I/O Wiring – Model 2400S Analog Transmitters
P
o
wer Su
ppl
y
I/O
W
irin
g
W
irin
g
– DP
an
d
d
DN
I/
O W
iri
n
g
– AN
Be
fo
fo
re
Y
Y
o
u
Begin
Figure 3-19
Safe area frequency/discrete output load resistance values
3.5.4
Hazardous area discrete input wiring
The following discrete input wiring diagram is an example of proper hazardous area wiring for the
transmitter’s discrete input.
transmitter’s discrete input.
Figure 3-20
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
Supply voltage VDC (Volts)
Exter
nal pu
ll-up
resi
stor R
load
+ R
ba
rr
ie
r
minim
u
m v
a
lue
(Ohms)
Absolute minimum = 10 Ohms for supply voltage less than 5 Volts
OPERATING REGION
PLC or
other device
OR
)
Direct DC input
(see Table 3-2
(see Table 3-2
+
–
Hazardous area
Safe area
R
barrier
R
barrier