How the pieces of an InteliHive installation connect — the overall layout, the Modbus bus, and the IO-Link ports.
Isolate and lock out all power before wiring. Electrical work must be done by a licensed electrician. See Safety.
The controller’s terminal layout — power, Modbus, and ground terminal positions on the current board — is not yet in this manual. Follow the markings on the board.
The controller has no relays of its own: loads are wired to the Legacy Relay Device 6, the wireless outputs, or the NextStep pump — never to the controller.
Run the bus as one line from device to device, with termination at both ends.
A port-powered device takes 24 V from the controller’s switched bus supply, so the controller can power-cycle it to recover it. An externally powered device has its own supply and shares only the data lines. Tell the controller which is which when you add the device — see Port powered or externally powered.
Each port is an M12 A-coded socket. The wire colors are the standard IO-Link sensor-cable colors.
| Pin | Wire | Name | Carries |
|---|---|---|---|
| 1 | Brown | L+ | 24 V sensor supply |
| 2 | White | I/Q | Digital input |
| 3 | Blue | GND | Supply return |
| 4 | Black | C/Q | IO-Link data — or digital in / out |
Pins 1, 3, and 4, straight through on a standard M12 cable. Pin 2 is left free for a contact.
A dry contact — flow switch, level switch, external stop — between pin 2 and GND, with a pull-up from pin 2 to 24 V.
Fit the pull-up. The port’s internal pull-up is weak against the input threshold; without an external resistor a contact to ground may not switch reliably. See Configuring a contact.
| Meter output | Wire it | Set Type to |
|---|---|---|
| NPN (open collector, sinks to ground) | Output to pin 2, meter ground to pin 3, pull-up from pin 2 to 24 V | NPN |
| PNP (sources 24 V) | Output to pin 2, meter ground to pin 3; meter supply from pin 1 if it needs one | PNP |
| Reed or dry contact | Contact between pin 2 and pin 3, pull-up from pin 2 to 24 V | None |
Set Kind to Pulse and enter the meter’s K-factor — see Water meters.