Product Introduction

Model Explanation

• 1SAP245000R0001: ABB unique part number.

• DX531:

  • DX = Digital mixed I/O

  • 531 = S500 series mixed I/O module identifier.

• 245000: Platform code for S500 8DI/4DO relay AC I/O product.

• R0001: Initial hardware revision.

• Core definition: 8×115–230 VAC DI / 4×230 VAC 3A relay DO.

Technical Parameters

• Digital Inputs: 8 channels, 115–230 VAC, 50/60 Hz, 10 mA typical.

• Digital Outputs: 4 relay channels, 230 VAC / 3 A (resistive load), NO/NC contacts.

• Supply Voltage: 24 VDC (20.4–28.8 VDC) for module logic.

• Galvanic Isolation: Between channels and backplane; input/output isolated.

• Protection Class: IP20.

• Operating Temperature: 0 °C to +60 °C (horizontal).

• Storage Temperature: −40 °C to +70 °C.

• Humidity: 0–95 % non‑condensing.

• Dimensions (W×H×D): 67.5 mm × 76 mm × 62 mm.

• Weight: Approximately 0.15 kg.

• Mounting: Standard TH35‑15 DIN rail.

• Certifications: CE, UL, CSA, RoHS, Class I Div 2 (ATEX).

• Compatibility: AC500 V2/V3/eCo/S series; S500 I/O system (C0+ index); requires TU515/TU516 terminal base.

Interface and Communication Configuration

• Backplane Interface: S500 I/O bus, plug‑and‑play, hot‑swap enabled.

• Field Wiring: Screw terminals on TU515/TU516; recommended torque 0.6 Nm.

• Expansion: Up to 7 additional S500 modules via backplane.

• Hot Swap: Online replacement without system shutdown.

• Status LEDs: Power, run, fault, and per‑channel indicators.

• Bus Communication: Exchanges I/O data with AC500 PLC over S500 backplane.

Core Functions

• AC Input/Output Mix: Directly connects 115–230 VAC sensors (limit switches, pushbuttons) and 230 VAC actuators (valves, contactors, lamps), eliminating intermediate relays.

• Relay Outputs: 3 A rated contacts handle resistive loads; isolated outputs enhance safety.

• Electrical Isolation: Protects PLC and low‑voltage circuits from AC line noise and faults.

• Hot‑Swap Maintenance: Minimizes downtime in critical processes.

• Compact Design: Saves cabinet space with high‑density AC I/O.

Application Scenarios

• Factory automation: Conveyors, packaging machines, and assembly lines with AC sensors and 230 VAC actuators.

• Process automation: Water treatment, chemical, and pharmaceutical plants using AC‑based monitoring and control.

• Building automation: HVAC, lighting, and security systems with 230 VAC devices.

• General industrial: Retrofit projects replacing old relay panels; cost‑effective AC I/O solutions.

Usage and Maintenance Instructions

• Mount on DIN rail in a ventilated cabinet; avoid dust, moisture, and direct heat.

• Install TU515/TU516 terminal base first, then insert and lock DX531.

• Connect 24 VDC power (UP/UP3) with correct polarity.

• Wire AC inputs (115–230 VAC) and relay outputs (230 VAC) to screw terminals; tighten to 0.6 Nm.

• Configure I/O mapping via AC500 programming software.

• Check LED indicators regularly for power, run, fault, and channel status.

• Perform periodic maintenance: Tighten terminals, clean dust, and inspect for corrosion.

• In case of failure, replace the module online (hot swap) and verify wiring.