periNODE

Which periNODE for which signal?

Adapter	Signal	Use it for	What IT receives
periNODE 4-20mA	4-20 mA or 0-20 mA	A new measuring point: add an off-the-shelf 4-20 mA sensor	The value in physical units
periNODE 0-10V	0-10 V	A new measuring point: add an off-the-shelf 0-10 V sensor	The value in physical units
periNODE GPIO	24 V digital, two input/output channels	Existing machine signals such as a running contact, or switching sensors you add; machine states and counts for OEE	States and counts
periNODE Modbus	Modbus RTU over RS-485	Passive: listen to a bus the PLC already polls, sending nothing. Active: connect a single device nothing polls today	RTU frames over MQTT; values with units via periMICA and the Modbus IoTizer

periNODE adapters by signal type. All four use 100BASE-T1 (IEEE 802.3bw), the M8 hybrid connector to IEC 63171-6, 24 V DC, and MQTT and REST.

Not sure which adapter fits your installation? Tell us your signal type and what the PLC uses today. An engineer will recommend the setup.

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What every periNODE does

• Announces itself under its own hostname (mDNS) and is configured in a browser.
• Optional 256-bit end-to-end encryption and mutual TLS.
• Reach: Perinet has measured 100BASE-T1 at up to 180 m on installed Cat 5e (PRN100900).

Built like control hardware. Owned by IT.

periNODE is industrial hardware: 24 V DC, IP65/67, -40 °C to +70 °C, nothing to program. Where it taps an existing machine, it leaves the controls alone: periNODE GPIO reads a running contact in parallel, periNODE Modbus listens without sending a single frame. Every adapter has its own hostname and web interface, so IT sees each data point directly. And the data path belongs to the team that uses the data, so someone notices when it stops.

Questions

What are the alternatives to IO-Link masters and remote I/O for connecting sensors to MQTT or REST?

IO-Link masters and remote I/O stations publish from a central point: every sensor is wired back to the master or I/O station, which talks to IT directly or through an edge device. periNODE puts the network interface at the sensor instead. Each adapter has its own IP address and publishes over MQTT, with a REST API, so there is no master or I/O station in between. IO-Link vs Single Pair Ethernet compares the two in detail.

Can periNODE connect to a sensor that already feeds a PLC?

For digital signals, yes: periNODE GPIO reads a 24 V signal such as a running contact. On a Modbus RTU bus a PLC already polls, periNODE Modbus listens in passive mode without sending anything. For a 4-20 mA loop the PLC depends on, use periSNOOP 4-20mA.

Do I need a gateway or a PLC change?

No. Each periNODE publishes directly over MQTT and offers a REST API. A periSWITCH or periSTART connects the Single Pair Ethernet segment to standard Ethernet, and the PLC program stays as it is.

Which sensors work with periNODE?

Any off-the-shelf sensor with a 4-20 mA, 0-10 V, 24 V switching or Modbus RTU interface and a 24 V DC supply within the adapter's output.

More background: Single Pair Ethernet explains the standards, reach and power.