Emerson Tescom ER5000 Series, Руководство пользователя, Страница: 101 / 248

ER5000 —
101
Installation Variations
Feedback Wiring Variations
Three Wire Transducer, PC or PLC A/D Card Used to Monitor
Voltage Produced by the 4–20 mA External Feedback
Figure 37 shows correct wiring for applications where it is
necessary to monitor the voltage produced across the ER5000’s
internal 250Ω resistor, rather than breaking into the 4–20 mA
loop, to avoid producing ground loops.
TRANSDUCER
YELLOW
ORANGE
- V IN
+V IN
TAN
VIOLET
BLACK
PC
GR
O
UND
+ S
U
PPL
Y
+ O
U
TP
U
T
Figure 37: Three Wire Transducer, Monitor Voltage Produced by 4–20 mA Feedback
WARNING
The controller must be disconnected from the power supply before
any additional wiring or change to jumper configuration is
performed. Do not reconnect the power supply until all additional
wiring connections have been made and are properly installed.
The feedback signal can, alternatively, be monitored
through the USB connection between the ER5000 and the
PC by reading variable #44 (ID_FEEDBACK).
Refer to Table 20 for correct wiring.
Table 20: Wiring for Monitoring Voltage from 4–20 mA External Feedback,
Three Wire Transducer
J3 Pins Wire Color Function
1 brown +setpoint input
2 red -setpoint input
3 orange +feedback input
4 yellow -feedback input
5 green -RS485 network connection
6 blue +RS485 network connection
7 violet +24V DC power
8 gray 24V return (power ground)
9 white +5V output (5 mA max.)
10 black analog signal/board ground
*
11
*
pink analog signal output
(active in Enhanced “F” models ONLY)
12 tan analog signal/board ground
NOTE NOTE
CAUTION CAUTION
WARNING WARNING
Check that Jumper J6 (refer to Figure 19 ) is installed for
4–20 mA operation and removed for 1–5V operation. There is no
jumper on the 0–10V ER5000 models.