ThePM554T-ETH (1TNC968900R0110)is a high-performance version of the AC500-eCo micro-PLC family, uniquely equipped with an onboardEthernet interface. This compact CPU is designed for modern decentralized automation that requires seamless integration into factory networks viaModbus TCP/UDP. Featuring 8 digital inputs and 6 transistor outputs, it handles high-frequency tasks with dual 30 kHz hardware counters.
Integrated Network:1 x Ethernet (RJ45) supporting TCP/IP, UDP, Modbus TCP
Hardware Counters:2 Channels, Maximum frequency 30 kHz
Program Memory:128 kB Flash EPROM
Data Storage:10 kB user data / Supports SD Card for external storage
Serial Interfaces:1 x RS485 (Non-isolated) / 1 x Optional RS485
Communication Protocols:Modbus RTU/TCP, CS31 Master, ASCII
Expansion Limits:Max 256 Digital I/O or 64 Analog channels (up to 7 modules)
Nominal Voltage:24V DC
Connection Type:Screw Terminals
Mounting:TH35-15 (35 x 15 mm) DIN Rail according to IEC 60715
Operating Conditions:Horizontal or Vertical mounting (with derating)
Protection Rating:IP20
Connectivity and Advanced Performance
ThePM554T-ETHstands out in the micro-PLC market due to its dual-interface communication architecture:
Industrial Networking:The built-in Ethernet port allows for remote programming, data monitoring via web-server (if supported by firmware), and high-speed peer-to-peer communication between PLCs.
Motion Capability:The 30 kHz hardware counters combined with transistor outputs allow the unit to drive stepper motor controllers or manage fast pulse-width modulation (PWM) tasks.
Scalable Intelligence:Despite its small size, it supports the CS31 Master protocol, allowing it to act as a head-station for a wider distributed I/O network.
Reliable Storage:The Flash EPROM architecture ensures the user program is retained without a battery, while the SD card slot provides a means for easy firmware updates and data logging.
