Basic Information

Structure: DIN rail installation, flame-retardant plastic casing, IP20 protection

Wiring: Spring terminals (screwless), 1/2 wire compatibility

Bus: Integrated CS31 fieldbus interface (commonly used in ABB's older PLCs)

Environment: Operating 0 - +60℃, Storage **-40 - +70℃**

Dimensions: 67.5 × 135 × 28 mm; Weight: Approximately 0.16 kg

Certifications: CE, RoHS

Function and Positioning

Provides mechanical installation + CS31 bus connection + 24VDC power supply for S500 I/O module

Used for communication between AC500 system and ABB CS31 bus devices (such as older Advant controllers, remote I/O stations)

Supports hot swapping, allowing I/O module replacement while powered on

As the main base for remote I/O station, expands I/O points of AC500 system

Core Parameters

Bus protocol: CS31 (ABB proprietary fieldbus)

Wiring method: Spring terminals (fast, screwless)

Power supply: 24VDC, supplies power to I/O module

Installation: Standard 35mm DIN rail

Compatible modules: S500 full series (DI524, DO524, AI523, AO523, etc.)

Difference from common bases

TU552-CS31: CS31 bus + spring terminals → 1SAP210400R0001

TU505-FBP: FBP bus (EtherCAT/PN) + screw terminals → 1SAP210200R0001 Applicable scenarios

Upgrade / Maintenance of the old ABB CS31 bus system (such as Advant 800xA, older model AC31)

Factory automation, packaging / textile machinery, remote I/O expansion of production lines

Requires quick wiring and maintenance-free I/O stations