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.


  • 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)
tPET-A4     CR  Tiny PoE Ethernet Module with 4-ch (Source-type, PNP) DO (RoHS)