Analog Sensors
These sensors have three wires: Signal, 5V DC, and Ground. Each ioStack has inputs for up to four separate analog sensors, which you can see printed on the circuitboard and on the image above as AI_1, AI_2, AI_3, and AI_4. The signal wire of your analog sensor connects to one of those ports. The 5V and Ground wires connect to the neighboring terminals.
1-Wire Sensors
These sensors also have three wires: Signal, 5V DC, and Ground. Each ioStack has inputs for up to four separate 1-wire sensors, which you can see printed on the circuitboard and on the image above as Input1, Input2, Input3, and Input4. The signal wire of your analog sensor connects to one of those ports. The 5V and Ground wires connect to the neighboring terminals.
I2C
These sensors have four wires:
Control Outputs
The relay controlling outputs have a two wire connection: Signal and Ground. Each ioStack has outputs for up to four separate control signals. You can see these outputs are in the middle terminal block on the right side of the image above.
Pulse Inputs
The pulse inputs have a two wire connection: Signal and Ground. Each ioStack has inputs for up to four separate pulse counts. You can see these inputs are at the bottom terminal block on the right side of the image above.
Power
We recommend a 12V DC power supply connected to the barrel connector. These are sold separately and can be found in our store here.
Mounting
Four holes at the corner of the board can be used for mounting the ioStack to a backing plate or DIN rail clip (not included).
The ioStack can also be stacked on the Push3 gateway. If you remove the lid of the Push3 you will see the same four sets of stacking connectors that the ioStack has. The headers on the underside of the ioStack will fit onto the stacking pins of the Push3. The layout of the stacking connectors mean this can only be done in one orientation so you wont misalign the pins and headers. Stacking in this way allows both devices to share a power supply and also to pass RS-485 data up and down the stack.
You can fit up to three ioStacks, and one Push3 gateway, in one of our Large Enclosures. Two of the ioStacks would be stacked together and the 3rd ioStack would be stacked on the Push3. The two stacks would be side by side in the enclosure.