Product Short Description

Product overview
The DC523 module belongs to ABB’s AC500-S500 I/O family and provides 24 software-configurable digital input/output channels for 24 VDC systems. It mounts on standard DIN rail and communicates via the AC500 backplane bus.

Description

Technical specifications
  • Channels: 24 total, each configurable as DI or DO
  • Input range: 24 VDC, thresholds ON ≥ 15 V, OFF ≤ 5 V
  • Output specification: 24 VDC, 0.5 A per channel, short-circuit and overload protected
  • Supply voltage: 20.4 – 28.8 VDC
  • Switching frequency: 50 kHz max per channel
  • Isolation: channel-to-bus 500 VAC
  • Wire types: 1- or 2-wire connection supported
  • Diagnostics: status LED per channel, group diagnostics via backplane
  • Operating temperature: 0 °C to +60 °C
  • Protection class: IP20
  • Dimensions: 62 mm × 76 mm × 75 mm (W × H × D)
  • Weight: 0.115 kg
Key features
  • High-density 24-point I/O in one module reduces panel space
  • Each channel individually programmable as input or output via Control Builder
  • Integrated protection against reverse polarity, short circuit and over-temperature
  • Hot-swap capable within AC500 rack
  • Front-facing spring-cage terminals for fast wiring and maintenance
Typical applications
  • Machine automation: packaging, material handling, assembly lines
  • Process industries: valve position feedback, pump start/stop, status indication
  • Building automation: lighting control, HVAC fan and damper interfaces
  • OEM machinery: modular I/O expansion for AC500-based controllers

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