Product Introduction

Model Explanation

• 07: ABB AC31/90 series I/O line

• DO: Digital Output

• 90: High‑density safety output module

• S: Safety‑certified (SIL 2)

Technical Parameters

• Channels: 8 digital outputs (transistor, 24 VDC)

• Output Rating: 24 VDC, 0.5 A per channel (short‑circuit protected)

• Safety Level: SIL 2 (certified for safety functions)

• Communication: CS31 safety bus (RS‑485, slave station)

• Isolation: Channel‑to‑bus isolation, 500 VAC

• Power Supply: 24 VDC (±10%), bus or external powered

• Protection Class: IP20 (DIN rail mount)

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: -25 °C to +75 °C

• Dimensions (W×H×D): 120 × 140 × 85 mm

• Weight: ~0.7 kg

• Certifications: CE, CSA, RoHS, SIL 2

Interface & Indicators

• Terminals: 24 VDC (L+/M), 8×DO (source), CS31 (A/B/GND)

• LED Indicators:

  • RUN: Green (module active)

  • COMM: Yellow (CS31 bus traffic)

  • FAIL: Red (fault/safety trip)

  • CH1–CH8: Yellow (output status)

Core Functions

1. SIL 2 Safety Outputs: Controls safety‑related actuators (e.g., safety relays, valves).

2. 8‑Channel High‑Side Switch: 24 VDC sourcing outputs for standard loads.

3. Short‑Circuit & Overload Protection: Per‑channel electronic fusing.

4. Safe Communication: CS31 safety bus with diagnostic coverage for data integrity.

5. Diagnostics: Channel open/short‑circuit detection, bus fault monitoring.

Application Scenarios

• Safety‑Critical Automation: Emergency stop circuits, safety gate interlocks, fire dampers.

• Process Industries: Oil/gas, chemical, pharmaceutical (SIL 2 safety loops).

• Factory Automation: Conveyor safety, machine tool safety circuits.

Operation & Maintenance

• Wiring: Use shielded cable for CS31; single‑end ground.

• Installation: Standard 35 mm DIN rail; keep away from high‑power noise sources.

• Maintenance: Test safety functions periodically; inspect terminals and cable glands.