11-27
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
If you connect the load to the voltage output via a 4-wire circuit, high accu-
racy is obtained.
Slot C
Slot B
C1
C2
C3
C4
B1
B2
B3
B4
A1
A2
A3
A4
1L+
2L+
1M
2M
+24V
M
QV+
QV–
S
+
S–
Slot A
AO
"
10V/1..5V
R
L
Figure 11-10 Connecting Loads/Actuators to a Voltage Output via a 4-Wire Circuit (Example TB 16SC)
The sensor lines (S +, S –) must be connected directly to the load. The volt-
age is thus measured and adjusted directly on the load.
You can also use only QV+ and QV– by bridging QV+ with S+ and QV–
with S– on the terminal block. This entails a loss of accuracy. In this case, the
line resistances are not compensated.
S + and S – must not remain unwired.
Connecting Loads
to a Voltage
Output
SC Analog Electronic Modules – Parameters