Technical Specifications Part Number: 3BDH000377R0001 Number of Input Channels: 8 analog‑input channels Input Signal: 4‑20 mA DC A/D Resolution: 16‑bit Galvanic Isolation: Group‑wise channel isolation Operating Supply Voltage: 24 V DC ±10 % Operating Temperature: 0 ℃ to +60 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5‑95 %, non‑condensing Mounting Type: Freelance rack plug‑in module Protection Class: IP20 Certifications: CE
Functional Features Acquires 8‑channel 4‑20 mA analog‑current signals from field transmitters. Built‑in loop open‑circuit and short‑circuit fault‑detection function. Group‑wise galvanic‑isolation design blocks field‑side ground‑loop interference. Front‑panel LED indicators show module power‑on, running and channel‑fault‑alarm status. Matched detachable terminal unit simplifies field‑wiring and module‑replacement work. All channel‑parameter configuration is completed through Freelance engineering‑tool software. Full mechanical‑and‑electrical compatibility with Freelance series rack hardware.
Application Scenarios Freelance DCS system process‑signal‑acquisition cabinet spare‑part‑replacement projects. Chemical, water‑treatment and light‑industry plant analog‑transmitter‑signal‑collection applications.
Performance Parameters Measurement Accuracy: ±0.05 % full scale MTBF: 224500 hours Shock and Vibration: Complies with IEC 60068‑2‑6 Freelance‑rack‑mount module standard Fault Tolerance: Single‑channel loop fault does not affect measurement function of other channels
Material Composition Circuit Substrate: Multilayer industrial PCB with conformal anti‑corrosion coating. Housing Frame: Reinforced flame‑retardant plastic plug‑in frame. Connectors: Gold‑plated backplane golden‑finger connector, matched detachable terminal unit. Internal Components: 16‑bit A/D conversion chip, isolation optocouplers, signal‑filter components, loop‑fault‑detection circuits. Fasteners: Metal spring‑clip locking buckle for rack‑mount fixation.
Installation Requirements Insert AX722F module into designated Freelance rack slot and install supporting terminal unit. Complete cabinet protective‑earthing complying with Freelance‑system grounding specifications. Field‑transmitter wiring uses shielded twisted‑pair cables; separate signal cables and high‑power power cables. Verify field‑transmitter signal range matches module‑specification before power‑on. Reserve ventilation‑space around module for heat dissipation. Tighten terminal‑unit screws to manufacturer‑specified torque‑value requirements. Ambient operating environment must stay within rated temperature‑humidity ranges without condensation.
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