ABB AC500-eCo PM554-RP-AC: Reliable CPU for Small to Medium Applications

Description

The ABB PM554-RP-AC (Order Code: 1SAP120800R0001) is a compact and versatile Programmable Logic Controller (PLC) CPU module from ABB’s AC500-eCo series, designed for cost-sensitive industrial automation applications. It combines a 32-bit processor with integrated digital inputs, relay outputs, and a wide-range AC power supply in a single DIN rail-mountable unit. This CPU is engineered to deliver reliable performance for small to medium-sized control tasks, offering a balance of functionality, ease of use, and scalability.

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Description

Application Scenarios

A municipal water pumping station required a control system upgrade for its aging relay-based control panels. The existing setup suffered from frequent contact welding and high maintenance costs. Engineers selected the ABB PM554-RP-AC CPU for its direct 220V AC power compatibility (eliminating the need for an external DC power supply) and its integrated relay outputs, which could directly drive the station’s contactors and motor starters. The module’s compact size allowed it to fit into the existing crowded panel. Post-installation, the station achieved reliable pump sequencing and level control, with the PLC’s diagnostics reducing troubleshooting time by over 60% and eliminating mechanical relay failures.

Parameter

Main Parameter	Value / Description
Product Model	ABB PM554-RP-AC (1SAP120800R0001)
Manufacturer	ABB
Product Category	PLC CPU Module (AC500-eCo Series)
Supply Voltage	100 – 240 V AC (Wide Range)
Power Consumption	~20 mA @ 100V AC; ~12 mA @ 240V AC
CPU & Memory	32-bit Freescale ARM @ 50 MHz; 128 KB Flash, 10 KB Data
Integrated I/O	8 Digital Inputs (DI), 6 Relay Outputs (DO)
Communication Ports	COM1 (RS-485), supports Modbus RTU Master/Slave
Programming Languages	IL, LD, FBD, ST, SFC, CFC (IEC 61131-3)
Expansion Capability	Up to 10 S500 I/O modules via I/O bus
Operating Temperature	0 °C to +60 °C (Horizontal Mounting)
Dimensions (WxHxD)	137 mm x 137.16 mm x 35.6 mm
Protection Rating	IP20