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Premium Quality PLC Control Component RSMB-08ROCD-XLDSMB

RSMB-08ROCD-XLDSMB is an 8-channel high-density relay interface terminal block manufactured by Weidmüller, belonging to the RSMB series isolated relay output modules for PLC/DCS digital signal conversion. It integrates 8 independent RCL standard electromechanical relays to provide complete galvanic isolation between controller input side and field load output side, eliminating interference between control circuit and actuator circuit

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Technical Parameters Electrical Ratings Control Input Side (PLC D-SUB Bus) Rated Input Voltage: 24 V DC ±10% Single Channel Input Current: 22 mA DC Control Circuit Max Voltage: 30 V DC Common Pole Logic: Positive common (+COM, RO type) Relay Output Side (Field Load) Relay Type: RCL single-pole changeover (1CO) potential-free contact Contact Material: AgNi 90/10, optional gold-plated for micro-load Rated AC Continuous Current: 6 A / channel (250 V AC max) Rated DC Continuous Current: 5 A / channel (250 V DC max) Minimum Switching Load: 0.01 A / 10 V Peak Inrush Current: 16 A (short-time motor/valve load) Insulation & Dielectric Strength Isolation Class: Galvanic isolation input ↔ output Clearance Input/Output: ≥5.5 mm Impulse Withstand Voltage (1.2/50μs): 6 kV Dielectric Test Voltage: 2500 V AC / 1 s Overvoltage Category: III (control), II (load); Pollution Degree 2 Mechanical & Connection Specs PLC Side Interface: XL extended D-SUB male flat ribbon bus connector (XLDSMB) Field Wiring Terminals (CD Crimp Type) Wire Cross-section: Solid 0.2–2.5 mm², Multi-strand 0.2–1.5 mm² Terminal Torque: 0.6–0.8 N·m Mounting: Standard TS35 DIN top hat rail Dimensions (L × W × H): 110 mm × 102 mm × 68 mm Net Weight: ~320 g Relay Service Life: Mechanical 3×10⁷ cycles; Electrical 1×10⁵ cycles (6 A / 250 V AC) Environmental & Compliance Operating Temperature: -25 °C ~ +50 °C Storage/Transport Temperature: -40 °C ~ +60 °C Protection Class: IP20 (cabinet internal use only) Approvals: RoHS, REACH, cULus Listed, IEC 61800, EN 50178 LED Indicator: Green LED per channel (lights up when relay coil energized)