Security & Access Control BAC NET™ | RS232/485 Cables

Summary: Security & Access Control BAC NET™ | RS232/485 Cables

Security & Access Control BACnet™ | RS‑232/485 Cables

Windy City Wire manufactures SmartWire® low-voltage cables engineered for reliable BACnet MS/TP, RS‑485, and RS‑232 communication in commercial and industrial facilities. Our product offering supports building automation, access control, and environmental systems with constructions that balance electrical performance, code compliance, and installation efficiency. Options include low-capacitance plenum and non-plenum designs, overall or each‑pair shielding for noise mitigation, and multiple gauges to match run length and device requirements. SmartWire is made in the United States and is part of our complete solutions for professional integrators.

• Built for performance-critical networks: Low-capacitance and shielded twisted-pair designs help maintain stable data transmission for BACnet, RS‑485, and RS‑232 over longer distances and in noisy electrical environments.
• Commercial code coverage: Plenum (CMP, CL3P/CMP) and non‑plenum (CM, CL3/CM) options support a range of building pathways, plus direct burial choices for campus interconnects.
• Installation-focused details: SmartWire Glide lubrication is applied during manufacturing to reduce pulling friction by up to 70%, helping crews pull cable faster with less rework.
• Right-sized for the job: Available in 18, 22, and 24 AWG to meet power, distance, and bend-radius needs across access control, controllers, readers, and automation trunks.
• Identification options: Constructions include common pair color codes such as Black/White and White‑Blue/Blue; White‑Orange/Orange to simplify terminations and service.
• Lengths to fit project scopes: Available in 500, 1000, and 2500 ft lengths.
• Shielding choices: Overall aluminum/polyester foil shield or EPS (each‑pair shield) to match the noise profile of the installation.

Specify SmartWire for your next security and access control project to standardize materials across sites, streamline pulls, and support consistent BACnet and RS‑485 performance from panel to endpoint.

Available Constructions

• 22 AWG 2 Conductor Tinned Copper, Shielded Plenum Low‑Cap, CMP: A low-capacitance plenum cable for BACnet MS/TP and RS‑485 trunks in return-air spaces. Tinned copper and overall foil shield help resist corrosion and reduce EMI.
• 22 AWG 2 Conductor Bare Copper, Shielded Plenum, CMP: Plenum-rated, shielded twisted pair for RS‑485/RS‑232 where bare copper is preferred. Suitable for access control loops and controller interconnects.
• 24 AWG 1 Pair Tinned Copper, Shielded Plenum Low‑Cap, CMP: Compact, low-capacitance plenum pair for shorter or device-level RS‑485 drops. Ideal where pathway space is limited.
• 24 AWG 1.5 Pair Tinned Copper, Shielded Plenum Low‑Cap, CMP: Adds a third conductor alongside a primary pair for devices needing an auxiliary lead. Maintains low-cap performance in plenum spaces.
• 22 AWG 1 Pair Tinned Copper, Shielded Plenum, CMP: Heavier gauge single pair for longer runs or lower voltage drop to readers, sensors, and BACnet field devices. Overall foil shield supports noise control.
• 24 AWG 1 Pair Bare Copper, Shielded Plenum, CMP: Plenum-rated single pair with bare copper for standard device communications. A practical choice for RS‑232 point-to-point links.
• 18 AWG 1 Pair Tinned Copper, Shielded Plenum, CMP: Larger gauge single pair for extended distances or higher current low-voltage signaling in plenum pathways. Shielding helps maintain signal integrity near power conductors.
• 24 AWG 2 Pair Tinned Copper, Shielded Plenum Low‑Cap, CL3P/CMP: Two low-cap pairs with EPS (each‑pair shield) for improved crosstalk control when running data and control on separate pairs. Suited for multi-drop BACnet lines and zone buses.
• 24 AWG 1 Pair Tinned Copper, Shielded Non‑Plenum Low‑Cap, CM: Low-capacitance single pair for RS‑485 in standard (non-plenum) spaces. A cost-effective choice for device connections and patching between enclosures.
• 18 AWG 1 Pair Tinned Copper, Shielded Non‑Plenum, CL3/CM (300 V): Robust non-plenum pair for longer runs and control circuits requiring CL3. Shielding supports clean signaling in mixed-voltage conduits.
• 24 AWG 2 Pair Tinned Copper, Shielded Non‑Plenum Low‑Cap, CM: Two low-cap pairs for segmented communications or combined control and data in non-plenum areas. Overall foil shield helps reduce interference.
• 24 AWG 1 Pair Tinned Copper, Shielded Non‑Plenum, CM: Standard single pair for device-level RS‑485/RS‑232 in conditioned spaces. An efficient option for short intra-room runs.
• 22 AWG 1 Pair Tinned Copper, Shielded Direct Burial, Direct Burial (Non‑UL): Moisture-resistant construction for underground pathways between buildings. Shielded to limit noise pickup in campus environments.

Common Uses

• BACnet MS/TP trunks and stubs
• RS‑485/RS‑232 device communications
• Access control panels, controllers, and readers
• HVAC, temperature control, and building automation systems
• Lighting control networks and PLC interconnects

Need help selecting the right BACnet or RS‑485 cable for your environment and run length? Our team can assist with plenum versus non‑plenum choices, low-capacitance requirements, shielding type, and gauge selection.

Solutions: Security & Access Control BAC NET™ | RS232/485 Cables

Security & Access Control BACnet | RS‑232/485 Cables

Windy City Wire designs low‑voltage communication cables that help security, access control, and building automation systems operate reliably at scale. This family of shielded twisted‑pair cables is built for BACnet MS/TP and other RS‑485 networks, as well as RS‑232 device connections used throughout commercial facilities. With plenum and non‑plenum options, low‑capacitance constructions, and multiple gauges and pair counts, these cables deliver stable signaling, noise resistance, and long‑distance performance for demanding B2B environments.

Where these cables are used

• Access control infrastructure: Controller‑to‑door interface modules and downstream trunks for OSDP (RS‑485), reader communications, REX sensors, door contacts, and intelligent door controllers in enterprise systems.
• Intrusion systems: Panel‑to‑expander buses, keypad and module links, and serial integrations to third‑party devices using RS‑232/RS‑485.
• Video and intercom peripherals: PTZ camera control (RS‑485), door stations, and intercom controllers requiring shielded twisted pair for reliable serial control.
• Building automation systems (BAS): BACnet MS/TP trunks and drops for VAV/FPB controllers, AHUs, boilers/chillers, thermostats, and zone controllers; lighting control networks; energy and power monitoring meters.
• Industrial control and facility systems: PLC and HMI communications, VFD networks, process controllers, and gateways leveraging RS‑485 protocols (including Modbus RTU).
• Perimeter and entry systems: Gates, turnstiles, parking systems, and elevator interface panels where shielded serial control links are required.

Construction options to match the application

• Multiple gauges for distance and device needs: 18 AWG, 22 AWG, and 24 AWG selections support a range of run lengths and device requirements. Choose heavier gauges for longer trunks or where added robustness is preferred, and lighter gauges for shorter drops and higher device density.
• Pair counts for network trunks and device drops: Configurations include 1 pair, 1.5 pair, and 2 pair to support both trunk and auxiliary signaling needs in access control and BAS networks.
• Shielding for noisy environments: Overall foil shields with drain provide excellent EMI/RFI rejection for stable RS‑485 and RS‑232 communications in electrical rooms, above ceilings, and near mechanical equipment. Options with individually shielded pairs are available for low‑noise zone buses and sensitive control lines.
• Low‑capacitance designs: Selected constructions reduce capacitance to help maintain signal integrity on longer BACnet MS/TP and RS‑485 runs, supporting reliable throughput and device counts on shared trunks.
• Plenum and non‑plenum choices: CMP plenum‑rated cables meet UL and building code requirements for air‑handling spaces, while CM/CL3 non‑plenum options provide cost‑effective performance in standard pathways. Direct‑burial options are available for campus links and outdoor conduits where specified.
• Material and compliance details: Tinned copper and bare copper constructions address corrosion resistance and termination preferences. All options are designed for professional installations and include RoHS compliant selections.
• Color identification: Distinct jacket colors and industry‑standard pair color codes support quick identification and organized terminations across large projects.

How these cables support secure, scalable systems

• Stable RS‑485 performance: Consistent impedance control and shielding help minimize reflections and interference for BACnet MS/TP, OSDP, Modbus RTU, and other RS‑485 protocols used in access control and BAS.
• Reliable RS‑232 device links: Short serial runs to service ports, gateways, and controller interfaces benefit from shielded constructions that reduce noise and signal dropouts.
• Noise immunity in mixed‑use spaces: Overall foil shields and drain wires protect against EMI from VFDs, motors, lighting, and power distribution equipment common in commercial and industrial facilities.
• Flexible design coverage: From a single reader drop to multi‑floor trunk lines and campus connections, available gauges and pair counts simplify standardization across all project tiers.

Industries and environments served

• Commercial offices and corporate campuses
• Healthcare facilities and laboratories
• Data centers and critical facilities
• K‑12 and higher education
• Industrial manufacturing and distribution centers
• Hospitality, gaming, and entertainment venues
• Retail and mixed‑use properties
• Airports, transit, and transportation hubs
• Utilities, energy, and public sector facilities
• Stadiums and large public assembly spaces

Selection checklist for project teams

1. Protocol and topology: Confirm BACnet MS/TP, OSDP, Modbus RTU, or other RS‑485/RS‑232 requirements; plan trunk and stub lengths, node counts, and termination points.
2. Environment and code: Choose CMP plenum for air‑handling spaces; select CM/CL3 for standard areas; use direct‑burial versions for outdoor or between‑building runs where specified.
3. Distance and data rate: Match gauge and low‑capacitance constructions to segment length and baud rate targets for stable RS‑485 performance.
4. EMI conditions: Specify shielded twisted‑pair with drain, and consider individually shielded pairs where cross‑talk must be minimized.
5. Device density: Select 1 pair for simple drops or 2 pair for combined control and auxiliary signaling on the same pull.
6. Identification: Use jacket and pair color conventions to streamline commissioning and long‑term maintenance.

Common integrations supported

• Enterprise access control platforms using OSDP over RS‑485 for secure reader communications
• BAS networks using BACnet MS/TP for HVAC and lighting controls
• Serial bridges, gateways, and protocol converters (RS‑485 to IP, RS‑232 to RS‑485)
• Energy and power metering over RS‑485 (including Modbus RTU)
• PTZ camera control and specialty serial peripherals

Why spec these cables for Security & Access Control

• Standards‑driven: CMP plenum and CM/CL3 non‑plenum constructions meet UL building wiring requirements for power‑limited, low‑voltage control circuits.
• Designed for long‑term reliability: Shielded twisted‑pair and low‑capacitance options help preserve signal margins as systems scale and devices are added.
• Multiple Configurations: Gauges (18/22/24 AWG) and pair configurations support enterprise rollouts, retrofits, and multi‑site standards.

Whether you are building out a BACnet MS/TP backbone, upgrading to OSDP readers on an RS‑485 bus, or connecting RS‑232 devices to controllers and gateways, Windy City Wire Security & Access Control BACnet | RS‑232/485 cables provide the shielded twisted‑pair foundation required for consistent performance, simplified installation, and long‑term serviceability.

Frequently Asked Questions: Security & Access Control BAC NET™ | RS232/485 Cables

• What AWG conductors are available with this SmartWire Security & Access Control BAC NET™ | RS232/485 Cables cable?

  Available in 18 AWG, 22 AWG, and 24 AWG constructions.

• What other colors is this SmartWire Security & Access Control BAC NET™ | RS232/485 Cables cable available in?

  Black/White, Pair - Black/White, Single - Yellow, White-Blue/Blue, White-Orange/Orange.

• Is this SmartWire Security & Access Control BAC NET™ | RS232/485 Cables cable made with solid or stranded copper conductors?

  These SmartWire cables use stranded copper conductors (available with tinned or bare copper depending on the construction) for flexible pulling and reliable terminations.

• What length is this SmartWire Security & Access Control BAC NET™ | RS232/485 Cables cable sold in?

  At Windy City Wire, we manufacture and stock SmartWire Security & Access Control cable wire in 1,000 ft as our standard length. Select items are also available in 500 ft and 2,500 ft lengths.

• What are some distinctions between BAC NET, RS232 and RS485 Cables?

  BACnet: An open building-automation protocol that can run over multiple physical layers; for BACnet MS/TP, a low-capacitance, shielded twisted pair (often 22–24 AWG) suitable for RS-485 is recommended.
  RS-232: Single-ended, point-to-point serial signaling for short runs; typically a single shielded pair (22–24 AWG) is used for reliable noise performance.
  RS-485: Differential, multi-drop serial bus supporting longer distances and multiple devices; a shielded twisted pair (often 22–24 AWG) with controlled capacitance is preferred for stable communications.

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