Emerson 1700 Benutzerhandbuch
Installation Manual
35
Output Wiring – Model 1700/2700 Intrinsically Safe Transmitters
O
u
tp
ut
Wi
ri
ut
Wi
ri
ng
– Con
– Con
fig
urab
le I
/O
S
p
e
ci
fication
s
Ou
tpu
tpu
t W
irin
g
irin
g
– Fiel
db
us/PR
us/PR
O
F
IB
U
S
Output Wiring – Intrinsica
ll
y Saf
e
Figure 5-2
Safe area mA output load resistance values
Figure 5-3
Safe area HART/analog single-loop wiring
0
100
200
300
400
500
600
700
800
900
1000
12
14
16
18
20
22
24
26
28
30
R
max
= (V
supply
– 12)/0.023
If communicating with HART, a minimum of 250
Ω and 17.5 V is required
Supply voltage VDC (Volts)
Exter
nal
resi
stor
R
load
(Ohms)
OPERATING REGION
Note: See Figure 5-2 for voltage and resistance values.
VDC
R
load
(250–600
Ω
resistance)
+
–
+
–
–
HART-
compatible host
or controller
mA1