ABB PM554-T 1TNE968900R0100 Central Processing Unit

Product Overview

The PM554T (1TNC968900R0100) is a highly efficient, compact PLC processor from ABB’s AC500-eCo family, specifically designed for small-scale automation projects that require reliable performance within a limited budget. This "All-in-One" CPU comes integrated with 8 Digital Inputs (24V DC) and 6 Transistor Outputs, featuring high-speed hardware counters (30 kHz) for precise motion or pulse detection. 

Technical Specifications

• Manufacturer: ABB

• Model Number: PM554T

• Order Code: 1TNC968900R0100

• EAN: 6943747170008

• Onboard I/O: 8 Digital Inputs (24V DC) / 6 Transistor Outputs (24V DC, 0.5A)

• Hardware Counters: 2 channels, Input frequency up to 30 kHz

• Program Memory: 128 kB Flash EPROM

• User Data Memory: 10 kB

• Storage Media: Flash EPROM / Optional SD Card support

• Communication: 1 x Serial Interface (RS485), Optional second RS485 port

• Protocols: Modbus RTU (Master/Slave), CS31 Master, ASCII

• Expansion Capacity: Up to 7 local modules (Max 256 Digital or 64 Analog channels)

• Nominal Voltage: 24V DC

• Mounting: TH35-15 (35 x 15 mm) or TH35-7.5 DIN Rail

• Protection Rating: IP20

• Dimensions: 135 mm (H) x 82 mm (W) x 74 mm (D)

• Net Weight: 0.3 kg

System Capabilities and Expansion

The PM554T serves as a versatile logic controller for decentralized or standalone applications. Key functional strengths include:

• High-Speed Counting: The two 30 kHz hardware counters enable the CPU to handle tasks such as flow measurement, positioning via encoders, and pulse width modulation.

• Scalable Architecture: Despite its small footprint, it can manage a total of 256 local digital I/O points or 64 analog channels through the AC500 expansion bus.

• Communication Flexibility: The onboard serial interface supports programming and Modbus networking. An optional non-isolated RS485 port can be added for multi-device communication.

• Standardized Programming: Fully compatible with IEC 61131-3 languages via the AC500 Control Builder, ensuring code portability across the entire AC500 range.