Title
LRP2000 Long Range Passive Reader/Writer
17
3.8
Digital I/O Circuitry
Both the Digital Inputs and Digital Outputs are optically isolated
circuits with no common path between any channel terminal and
another channel, or between any channel and the LRP2000 power.
Because they are independent and floating, the external wiring
controls their use. The inputs can be configured for sensors with a
PNP or NPN output. The outputs can be configured in a Sourcing or
Sinking configuration. The examples in Figures 3.11 through 3.18
show different connections for common input and output devices.
Inputs
The +IN terminal must be at a higher positive potential than the -IN
terminal for current to be sensed correctly. The voltage range is 4.5 to
30V between the +IN and the -IN inputs and the maximum current is
25 mA.
Figure 3-9. J23 Input Connector
Table 3-3:
Input Connector Pinout
Terminal number Signal Name
Polarity
1
+ IN A
Positive
2
- IN A
Negative
3
+ IN B
Positive
