ABB ISAP281200R0001 TU582-S Safety I/O Terminal Unit

Overview

The TU582-S (1SAP281200R0001) is a safety-rated terminal base developed for ABB S500 safety I/O systems. It acts as the fixed wiring interface between field devices and pluggable safety I/O modules, allowing signals to be terminated securely while maintaining the integrity required for functional safety applications.
The unit is optimized for permanent installation on DIN rails and enables fast module replacement without disturbing field wiring.

Functional Characteristics

Designed exclusively for ABB S500 safety digital I/O modules, the TU582-S (1SAP281200R0001) supports robust signal termination using maintenance-free spring-clamp technology. This ensures consistent contact force over time, even under vibration or thermal cycling.
The terminal unit distributes 24 VDC power and signal paths in accordance with ABB safety architecture, supporting deterministic behavior in safety loops such as emergency stops and protective interlocks.

Electrical Specifications

• Rated operating voltage: 24 VDC

• Compatible I/O type: Safety digital inputs (per S500 safety module design)

• Terminal technology: Tool-assisted spring-clamp terminals

• Electrical isolation: Defined by installed safety I/O module

• Designed for SIL-rated safety signal paths when used with approved modules

Mechanical Specifications

• Net height: 135 mm

• Net width: 67.5 mm

• Net depth: 28 mm

• Weight: 0.162 kg

• Mounting method: Standard DIN-rail mounting (S500 system)

• Housing material: Industrial-grade insulating polymer

Packaged dimensions and weight may vary depending on distributor handling and shipping configuration.

Environmental & Compliance

• Compliance: CE

• Safety approval: TÜV (system-level compliance when combined with certified safety modules)

• Intended environment: Industrial control cabinets

• Designed for long-term installation in safety-critical automation systems

Typical Application Scenarios

• Machine safety input termination

• Emergency-stop and guard door circuits

• Process safety signal wiring

• Distributed safety I/O stations in ABB S500 architectures

FAQ

Q: Can the TU582-S be used with standard (non-safety) S500 I/O modules?
A: No. The TU582-S is specifically designed for safety I/O modules and should only be used within approved safety configurations.

Q: Does replacing a safety I/O module require rewiring the field connections?
A: No. Field wiring remains fixed on the terminal unit, allowing plug-in module replacement without disturbing installed cables.