ABB DP820 Pulse Counter Module

Technical Specifications Model: DP820 System Compatibility: ABB S800 I/O, AC800M Controller Input Channel Quantity: 4 pulse input channels Signal Level: 24 V DC pulse signal Max Pulse Frequency: 100 kHz Counter Resolution: 32‑bit counter register Isolation: Group‑wise galvanic isolation Logic Power Supply: From S800 rack backplane Mounting: DIN‑rail S800 rack plug‑in Operating Temperature: 0 ℃ to +55 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5‑95 %, non‑condensing Protection Class: IP20 Certifications: CE, UL

Functional Features Four independent high‑speed pulse input channels support pulse counting and frequency measurement. 32‑bit hardware counter realizes long‑period totalizer accumulation without overflow in short‑term. Configurable counting mode, direction discrimination and hardware gate control function. Group‑wise galvanic isolation restrains field‑side electromagnetic interference. Front‑panel LED indicators display channel signal presence and module running status. Built‑in self‑diagnosis function monitors power‑supply abnormality and internal hardware fault. Supports hot‑swap operation within S800 system authorized maintenance scope.

Application Scenarios S800 I/O DP820 pulse counter module spare‑part replacement. Flowmeter pulse signal acquisition, encoder pulse‑position measurement in process automation cabinet. Industrial projects requiring high‑speed pulse counting and frequency‑value collection.

Installation Requirements Insert DP820 into S800 I/O rack target slot and lock side spring buckle. Connect field pulse‑sensor signal cables to front‑side screw terminals, tighten terminals to specified torque. Configure counting mode, filter parameter and working logic via AC800M engineering tool. Implement protective earthing complying with S800 system grounding specification. Pulse signal cables shall adopt shielded twisted‑pair cable and be separated from high‑power power cables. Reserve ventilation heat‑dissipation space around module slot. Ambient operating temperature shall keep within 0 ℃ ~ +55 ℃ without condensation.

Usage Notes Input pulse signal voltage must conform to 24 V DC signal‑level specification. Actual input pulse frequency shall not exceed 100 kHz maximum rated frequency.