Belden 4641FDW.00305 OSDP RS-485 Data Cable, 2 Pair 24 AWG Stranded Tinned Copper, Overall Foil Shield, Gray PVC Jacket, 120 Ohm

Security installers wiring access control networks rely on this Belden cable to connect card readers and controllers over OSDP or RS-485. The stranded tinned copper conductors and overall foil shield maintain signal integrity even in electrically noisy environments, while the 120-ohm impedance matches standard RS-485 requirements for clean data transmission.

Key specifications

• Cable type: OSDP RS-485 data communication cable
• Number of pairs: 2
• Conductor gauge: 24 AWG stranded (7x32) tinned copper
• Insulation: Polypropylene (PP), 0.18 mm thickness
• Shield: Overall Beldfoil® (aluminum foil-polyester tape)
• Drain wire: 24 AWG tinned copper
• Jacket: Gray PVC
• Nominal outer diameter: 4.57 mm (0.180 in)
• Nominal impedance: 120 ohm
• Nominal capacitance (pair-to-pair): 41 pF/m (12.5 pF/ft)
• Nominal velocity of propagation: 66%
• Operating temperature: -20°C to +75°C
• Voltage rating: 300V RMS
• Approvals: UL CM, NEC CM, RoHS compliant

Why choose it

Belden is a trusted name in signal transmission, and this cable lives up to that reputation. The stranded tinned copper conductors offer flexibility and corrosion resistance, while the overall foil shield protects against electromagnetic interference—critical for reliable RS-485 data transmission. The 120-ohm impedance matches standard RS-485 requirements, ensuring proper signal termination and minimal reflections.

Ideal use cases

• Access control systems using OSDP protocol
• RS-485 serial communication links
• Connecting card readers, controllers, and other security devices

Good to know

This cable is UL CM and NEC CM rated for in-wall installation, making it suitable for permanent building wiring. The gray PVC jacket provides durability and easy identification. With a temperature range of -20°C to +75°C, it performs reliably in a variety of indoor environments.