Net DAQuiri Wiring Diagrams
The function of each of the I/O terminals can be set in the web user interface. Refer to the following wiring diagrams for guidance on how to choose an I/O type and the connections.
- Analog Input (0-10V)
- Analog Input (4-20mA)
- Discrete Input (Sink)
- Discrete Input (Source)
- Discrete Output (Sink)
- Logic Output (0 & 3.3V)
- Relay Outputs
The product described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems.
Working in proximity with hazardous voltages can result in death or serious injury to personnel and/or damage to equipment. Qualified personnel must take appropriate precautions when working with hazardous voltages.
The multi-function I/O channels 1,2,3 are non-isolated. External wiring must all be referenced to the same common potential (or ground) and connected to the 'COM' terminal on the Net DAQuiri as shown in the following wiring diagrams. If these I/O channels are connected to equipment operating at different reference potentials unintended current flows will result and may cause damage or unpredictable operation in the Net DAQuiri and connected equipment.
Sinking Discrete Inputs
Sinking discrete inputs are used for unpowered switches or sensors with NPN outputs.
Sourcing Discrete Inputs
Sourcing discrete inputs are used for sensors with PNP outputs or external devices that output TTL logic levels.
Analog Current Inputs
Analog current inputs are used for sensors with 4-20mA outputs.
Analog Voltage Inputs
Analog voltage inputs are used to monitor voltage signals. The Net DAQuiri can tolerate voltages from 0 to 30V, but the measurable range is limited to 0 to 10V.
Sinking Discrete Outputs (Transistor Outputs)
The NetDAQuiri supports up to 3 sinking transistor outputs for switching DC loads such as solenoids, indicators, or small motors.
Connect the external supply voltage to the VCC terminal as shown to protect the output transistors from voltage spikes that may occur when switching inductive loads.
Logic Outputs (0V & 3.3V)
The transistor outputs can be configured as logic outputs. The logic outputs are internally pulled up to 3.3V so that an external pull up is not needed.
Logic outputs are intended for use with high impedance logic inputs. They are not intended to provide 3.3V power to external devices.
AC voltage input using AC/DC wall adapter
The I/O channels can be used to monitor the on/off state of an AC power source. But the I/O channels need to remain isolated from the AC power source. Often times, the easiest way to accomplish this is to use an external AC/DC power supply or simple wall adapter as shown. Configure the input pin as a sourcing discrete input to monitor the presence of the AC voltage.
The NetDAQuiri has one relay output. Relay outputs are ideal for switching AC or high voltages. The internal relay on NetDAQuiri supports up to 600V and 1.2A continuous current.
Use external relay for high power load
If the output load requires more than 1.2A (more than 144 Watts at 120 VAC), an external relay can be used as shown to provide greater switching power.
Drive additional relays using transistor outputs
If the application requires additional relay outputs, up to three additional external relays can be connected as shown using the transistor outputs.