Emerson 1700 Benutzerhandbuch
Installation Manual
31
Output Wiring – Model 1700/2700 Analog Transmitters
Installing th
e T
ransmitte
ransmitte
r
O
u
tp
ut
Wi
ri
ut
Wi
ri
ng
–
–
An
al
og
Sensor W
irin
g
g
Be
fo
fo
re
Y
Y
o
u
Begin
Installing th
e T
ransmitte
ransmitte
r
O
u
tp
ut
Wi
ri
ut
Wi
ri
ng
–
–
An
al
og
Sensor W
irin
g
g
Be
fo
fo
re
Y
Y
o
u
Begin
Installing th
e T
ransmitte
ransmitte
r
O
u
tp
ut
Wi
ri
ut
Wi
ri
ng
–
–
An
al
og
Sensor W
irin
g
g
Be
fo
fo
re
Y
Y
o
u
Begin
Installing th
e T
ransmitte
ransmitte
r
O
u
tp
ut
Wi
ri
ut
Wi
ri
ng
–
–
An
al
og
Sensor W
irin
g
g
Be
fo
fo
re
Y
Y
o
u
Begin
Figure 4-2
HART/analog single-loop wiring
Figure 4-3
RS-485 point-to-point wiring
820
Ω maximum loop resistance
For HART communications:
• 600
• 600
Ω maximum loop resistance
• 250
Ω minimum loop resistance
+
–
HART-
compatible host
or controller
Note: The RS-485 communication wires must be shielded.
Other devices
RS-485A
RS-485B
Primary
controller
Multiplexer