tPET-P2A2 Tiny PoE Ethernet Module with 2-ch DI and 2-ch (Source-type, PNP) DO


Key Features

  • Built-in Web Server
  • Cost-effective Tiny Ethernet I/O Modules
  • Support Modbus TCP/UDP and MQTT Protocols
  • I/O Pair Connection (Push and Pull)
  • Redundant power inputs: PoE (IEEE 802.3af, Class 1) and DC input
  • Supports Dual-watchdog
  • Supports Web Configuration and Firmware Update Via Ethernet
  • Supports Latched DI, 32-bit DI Counters, and Frequency Measurement
  • DO Power-on and Safe Value


Providing various digital I/O functions, the tET/tPET series is an IP-based Ethernet I/O monitoring and control module. The module can be remotely controlled through a 10/100 M Ethernet network by using Modbus TCP protocol. Modbus has become a de facto standard communications protocol in industry and is now the most commonly available means of connecting industrial electronic devices. This makes the tPET-P2A2 perfect integration with the HMI, SCADA, PLC, and other software systems.

The functionality of the tET/tPET series is almost the same as the ET-7000/PET-7000 series. The tET/tPET series tiny Ethernet I/O modules support various I/O types, like photo-isolated digital input, relay contact, photoMOS relay, and open-collector output. The module can be used to create DI to DO pair-connect through the Ethernet. Once the configuration is completed, the tET/tPET series module can poll the status of local DI channels and then use the Modbus/TCP protocol to continuously write to a remote DO device in the background.

The tPET-P2A2 provides a dual watchdog: CPU watchdog and host watchdog. The CPU watchdog automatically resets itself when the built-in firmware runs abnormally. The host watchdog monitors the host controller (PC or PLC), and the output of the module can go to a predefined state (safe value) when the host fails.

For maximum space savings, the tET/tPET series is offered in an amazing tiny form factor that makes it can be easily installed anywhere, even directly embedded into a machine. It is equipped with two removable terminal block connectors for easy wiring and features a powerful 32-bit ARM MCU to handle efficient network trafficking. The tPET series offers true IEEE 802.3af-compliant (classification, Class 1) Power over Ethernet (PoE) using a standard category 5 Ethernet cable to receive power from a PoE switch like the NS-205PSE. When there is no PoE switch on site, the tPET series accepts power input from the DC adapter.


Factory, Building, Home Automation and Remote Maintenance