Overview
The ABB DSDX 451 PLC I/O expansion unit (part number 5716075-K) is a Remote In/Out Expansion Unit purpose-built for ABB Advant OCS distributed control systems. This module expands the input/output capacity of existing PLC and control systems, enabling engineers to add more digital I/O points without replacing core hardware. The DSDX 451 is ideal for retrofits, system upgrades, and applications requiring remote I/O distribution across industrial facilities.
Key Features
- 20 digital input channels at 24V logic level
- 12 digital output channels with 0.1–3A per-channel capacity
- Designed for ABB Advant OCS and compatible with S400 I/O platforms
- Compact form factor: 216 mm (L) × 180 mm (H) × 94.5 mm (W)
- Standard connector plugs (2-pos, 4-pos, 8-pos options) for fieldbus integration
- WEEE Category 5 compliance
Technical Specifications
The DSDX 451 provides robust digital I/O functionality with the following technical parameters:
- Digital Inputs: 20 channels, 24 VDC, optically isolated
- Digital Outputs: 12 channels, 0.1–3 A per output
- Communication: Advant Fieldbus / S400 compatible
- Operating Voltage: 24 VDC (input side)
- Connector Options: Plug 2-pos (2664193-2), Plug 4-pos (2664197-4), Plug 8-pos (2664193-8)
- Dimensions (L × W × H): 216 × 94.5 × 180 mm
- Weight: 2.9 kg
- Regulatory: RoHS exemption 2011/65/EU Article 2(4)
Typical Applications
The ABB DSDX 451 is commonly deployed in:
- Process control and manufacturing automation plants
- Utility and power generation control systems
- Remote I/O racks for distributed PLC architectures
- System expansion for legacy Advant OCS installations
- Oil & gas, chemical, pulp & paper, and utility sectors
Compatibility & Replacements
The DSDX 451 integrates seamlessly with ABB Advant Master and Advant OCS control systems. It supports standard ABB fieldbus protocols and is interchangeable with other S400-series I/O modules within the same Advant architecture. For system-specific compatibility confirmation, consult your Advant system documentation or contact an ABB authorized distributor. Related models include the DSDX 452 and DSDX 453 variants, which offer different I/O configurations.
