Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 392)

6-88 Component Definition and Maintenance
7000A-UM150F-EN-P –June 2013 7000 “A” Frame
Customer Interface Board
(cont.)
CIB
J4A
Process Loop Receiver
Shielded Twisted Pair
SHLD
1
2
3
4
Ia
CIB
J4A
Process Loop Receiver
Shielded Twisted Pair
SHLD
1
2
3
4
Ia
Figure 6.68 – Recommended Connection to CIB Transmitter
Current Loop Receiver
The receiver can accept either 0-20mA or 4-20mA inputs from an external
transmitter. The transmitter must have a minimum loop compliance of 5V
to satisfy the input impedance of 250 ohms.
A block diagram of the receiver is shown below.
DSP
FPGA
Isolated
DC/DC
Converter
A/D
Isolation
Amplifier
250R
3
4
1
2
+15V @ 2W
Buffer
J4B
x 1 u 1
DSP
FPGA
Isolated
DC/DC
Converter
A/D
Isolation
Amplifier
250R
3
4
1
2
+15V @ 2W
Buffer
J4B
x 1 u 1
Figure 6.69 – Process Loop Receiver Block Diagram