Product Introduction

Model Explanation

• 1SAP217200R0001: ABB standard part number.

• TU531:

  • TU = Terminal Unit

  • 531 = 230 VAC / relay screw‑terminal base for S500

• 217200: S500 platform code for 230 VAC screw‑terminal units.

• R0001: Hardware revision (initial version).

• Feature: Passive base, works with S500 I/O modules (e.g., DI524, DO526, relay modules), not standalone.

Technical Parameters

• Supply: 24 V DC (backplane)

• Field voltage: Up to 230 VAC

• Connection: Screw terminals (tool‑required)

• Number of terminals: 40 pins (20×2)

• Protection: IP20

• Operating temp.: 0 °C to +60 °C

• Storage temp.: -40 °C to +70 °C

• Humidity: 0–95% non‑condensing

• Weight: ~0.21 kg

• Dimensions: 67.5 mm W × 135 mm H × 28 mm D

• Mounting: Standard DIN rail

• Certifications: CE, UL, CSA, RoHS

• Compatibility: AC500 V2/V3, AC500‑eCo, AC500‑S; S500 230 VAC/relay I/O modules.

Interface and Communication

• Screw terminals for 230 VAC field wiring (sensors, actuators, relays).

• Backplane connector for S500 I/O modules; internal bus and 24 V DC power distribution.

• Connects to AC500 internal bus; plug‑and‑play, no config needed.

• Supports hot swap of I/O modules without system shutdown.

Core Functions

• Secure mounting and reliable screw‑connection for S500 230 VAC/relay modules.

• High contact stability: Ideal for high‑vibration environments.

• High voltage isolation: Safe handling of 230 VAC signals in industrial panels.

• Compact design: Saves cabinet space with standard DIN rail mounting.

• Built‑in EMC protection: Ensures noise immunity in harsh industrial environments.

Application Scenarios

• ABB AC500 PLC + S500 I/O systems with 230 VAC input/output requirements.

• Factory automation: Conveyor systems, motor control panels, relay logic circuits.

• Building automation: HVAC, lighting control, fire alarm systems (230 VAC).

• Process automation: Pump control, valve actuation, auxiliary equipment monitoring.

• Projects preferring screw‑type wiring for critical 230 VAC circuits.

Usage and Maintenance

• Mount on DIN rail in cabinet; ensure ventilation, dryness, no direct sunlight.

• Connect 24 V DC with correct polarity (backplane power).

• Insert S500 I/O module into TU531 and lock.

• Wire field cables to screw terminals: strip wire, insert, tighten screw (0.6 Nm).

• Verify 230 VAC wiring insulation and isolation to prevent short circuits.

• Periodically check terminal tightness, dust, and corrosion; clean as needed.

• Use only compatible S500 230 VAC/relay modules; avoid over‑tightening screws.

• Troubleshoot: Check power, connections, and module status LEDs first; replace base if damaged.