June 6, 2022

ICP Australia is proud to introduce ICP DAS’s tPET-A4, which is a Tiny PoE Ethernet Module with 4-ch (Source-type, PNP) DO. 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 tET/tPET series 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 tET/tPET series provides dual watchdogs: 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.


  • Cost-effective Ethernet I/O modules (Modbus TCP/UDP slave)
  • Contains a 32-bit MCU that Efficiently Handles Network Traffic
  • 10/100 Base-TX Ethernet, RJ-45 x1 (Auto-negotiating, Auto MDI/MDIX, LED Indicator)
  • Includes Redundant Power Inputs: PoE (IEEE 802.3af, Class 1) and DC input
  • Supports TCP, UDP, HTTP, DHCP, BOOTP, and TFTP protocols
  • Supports UDP Responder for Device Discovery
  • Supports Web Configuration and Firmware Update via Ethernet
  • Isolated Digital Output
  • Supports I/O Pair-Connection through the Ethernet
  • Dual-Watchdog with Power-On and Safe Value
  • Low Power Consumption (about 1.7 W only)

See More:tPET-A4


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