User guide

DATA-LINC GROUP
8
PN 161-09889-001B
rev 3/2005 ver 6.33c
PLR580D / DA User Guide
Analog Operation
Specifications
1. This unit does not provide loop power to devices.
2. The outputs can operate on loops with a maximum total resistance of 300 ohms.
3. The resolution of this unit is 8 bits with accuracy of 2%.
4. All inputs use a common ground connection labeled “G”.
5. The input signal must be a 4-20 mA signal.
Point-to-Point Analog System
These units are bi-directional, they send and receive analog information both directions. The following is a common
example of analog use for the PLR580DA units. Again, the Master’s input corresponds to the same numbered output on
the Remote and vice versa. The 8 Master inputs match the 8 Remote outputs and the 8 Remote inputs match the 8
Master outputs.
Figure 6: Point-to-Point Analog Example
Pwr
4-20mA Input
4-20mA Output
G 1 2 3 4 5 6 7 8G 1 2 3 4 5 6 7 8
mA
13.7
mA
Sensor
with 4 -20 mA
Output
Pwr
4-20mA Input
4-20mA Output
G 1 2 3 4 5 6 7 8G 1 2 3 4 5 6 7 8
Master
Remote
Note: A loop power supply may be
needed. The PLR580DA units do not
supply loop power.