Description

ABB DLM01 Link Module Product Description

Technical Specifications

• Product Model: DLM01
• Brand: ABB
• Warranty: One Year
• Input Voltage: 24 VDC supplied via DCS rack backplane
• Operating Temperature: 0°C to +55°C
• Storage Temperature: -40°C to +70°C
• Response Time: ≤0.9 ms data frame forwarding latency
• Protection Class: IP20 (cabinet eurocard rack‑mount installation)
• Accuracy Class: Industrial communication grade
• Output Frequency: Not applicable
• Rated Current Range: 0.26 A typical operating current
• Communication Interface: S100 backplane bus, external link port
• Supported Protocols: ABB proprietary S100 parallel backplane bus protocol
• Overload Capacity: Signal surge suppression, transient noise protection
• Dimensions: 234 mm × 324 mm × 22.5 mm

Product Overview

The ABB DLM01 is eurocard‑format link module built for ABB Advant AC400 DCS platforms, acting as inter‑rack communication bridge to transmit process data and control commands between distributed control cabinets. This automation hardware maintains bus timing integrity and routes S100 bus packets across multiple racks for expanded DCS architectures. It addresses typical legacy system bottlenecks including insufficient inter‑rack connection ports and unstable cross‑cabinet communication under plant electromagnetic noise. Facilities running large ABB DCS deployments use this spare component to sustain multi‑rack synchronisation and avoid major system rework. Automation engineers, maintenance crews and system integrators in power generation, chemical processing and pulp‑and‑paper sectors rely on this unit for dependable distributed control networking. (Word count:169)

Key Functions

Multi‑Rack S100 Bus Data Bridging This module exchanges real‑time process values and control instructions between separate Advant DCS racks. It synchronises distributed controller nodes to keep deterministic control performance across expanded I/O layouts. The bridging function allows users to scale DCS I/O capacity without replacing core controllers.

Signal Conditioning for Long Cable Transmission On‑board signal conditioning reshapes bus signals over inter‑rack cabling. It filters industrial electromagnetic interference and minimises signal attenuation over longer cable distances. Stable signal quality prevents frame loss and communication timeouts in noisy plant environments.