Rockwell Automation 7000L PowerFlex 7000 Medium Voltage AC Drive C Frame - Marine - Manual (Page 275)

Component Definition and Maintenance 4-99
7000 ―C‖ Frame - Marine 7000L-UM302B-EN-P – June 2013
Isolated Process Receiver
These inputs are individually configurable to accept either a
-10/0/+10V input signal or a 4-20 mA signal. When configured for
voltage input, each channel has an input impedance of 75 Kohms.
When used as a current loop input, the transmitter must have a
minimum loop compliance of 2 volts to satisfy the 100 ohm input
impedance. Regardless of input configuration, each input is
individually isolated to ± 100V DC or 70V RMS AC.
A block diagram of the receiver is shown below.
4,8,12
3,7,11
∩/#
X1 U1
FPGA
DSP
1 st I/P pins
3
rd
I/P pins
2 nd I/P pins
A/D
Buffer
1,5,9
2,6,10
Isolation Amplifier
+
+
-
-
Figure 4.72 – Process Loop Receiver Block Diagram