ABB DSSR122 4899001‑NK Relay Output Module

Technical Specifications Model: DSSR122, Part No. 4899001‑NK System Compatibility: ABB Advant Master DCS System Output Channel Quantity: 8 relay output channels Output Form: Form A normally‑open dry contact Per‑contact Rating: 250 V AC 3 A, 30 V DC 3 A Galvanic Isolation: 1500 V AC between logic side and field side Power Supply: From rack backplane Mounting: Eurocard rack plug‑in Operating Temperature: 0 ℃ to +60 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5‑95 %, non‑condensing Protection Class: IP20 Certifications: CE

Functional Features Eight independent mechanical relay dry‑contact outputs support both AC and DC field load switching. Complete galvanic isolation separates control logic circuit from field‑side load circuit. Each channel front‑panel LED indicator reflects relay actuation real‑time status. Built‑in self‑diagnosis monitors backplane power supply and bus communication status. Field‑side load power is fully externally supplied and independent of module internal circuit. Supports hot‑swap operation under authorized Advant Master maintenance conditions.

Application Scenarios Spare‑part replacement for DSSR122 4899001‑NK relay output module. Interlock relay output and auxiliary equipment switching control for legacy Advant Master DCS cabinets. Industrial sites requiring multi‑voltage dry‑contact relay output control.

Installation Requirements Insert DSSR122 4899001‑NK into target rack slot and tighten front locking screw. Connect external field load power and load equipment cables to front‑side relay‑contact screw terminals, tighten terminals to specified torque. Implement protective earthing complying with Advant Master system grounding specification. Separate high‑voltage field load cables from weak‑signal control cables inside cabinet. Reserve ventilation heat‑dissipation space around module slot. Ambient operating temperature shall keep within 0 ℃ ~ +60 ℃ without condensation.