6
2.2.
Signal connection
The screw terminal connector in front of the DAQ device is for connecting the measured
signals.
On the back of the DAQ device, there are two groups of connectors, one USB interface for
connecting with computers directly; the other RS485 interface for connection with computers or
embedded processing system like PLC.
Figure 2 and Diagram 2 show its pin distribution and the corresponding signal in detail.
Diagram 2
、
Screw terminal connector corresponding signals
Name
Notes
ch+
ch0+ to ch15+ is the signal positive input of channel 0 to 15
ch-
ch0- to ch15- is the signal negative input of channel 0 to 15
5V
DC
5V
DC
power input of RS-485 interface
GND
Power ground of RS-485 interface
A+
Positive input of RS-485 communication signal
B-
Negative input of RS-485 communication signal
Attention
：
For models with USB interface, there is no need of extra 5V
DC
power supply.
Figure 2
、
Screw terminal connector pin detail
