Manufacturer: DataLink
Model: CD485,RS485

Features

• The [CD485, RS485] series is a compact and lightweight RS232C to RS485 converter.
• It converts RS232C signals to RS485, extending the communication range of RS232C devices up to 1200 meters—overcoming the typical 15-meter distance limitation of RS232C communication.

Specifications

◆List of RS232C⇔RS485 converters

●RS485/N

• No power supply needed (uses power from RS232C signal line)
• Optional AC adapter available
• RS232C connector: D-sub 9-pin female (DCE configuration)
• RS485 connector: 5-pin terminal block (insertion screw type)

●RS485/PN

• No power supply required (powered via RS232C signal line)
• RS232C connector: D-sub 9-pin female (DCE arrangement)
• RS485 connector: 6-pin terminal block (screw insertion type)

●RS485/PV

• External power supply required (AC adapter included as standard)
• RS232C connector: D-sub 9-pin female (DCE arrangement)
• RS485 connector: 6-pin terminal block (screw-insertion type)

●CD485/V Series

• External power supply required (AC adapter)
• RS232C connector: D-sub 9-pin female (DCE arrangement)
• RS485 connector: 5-pin terminal block (screw-insertion type)

●CD485/V-RoHS

• External power supply required (AC adapter)
• RS232C connector: D-sub 9-pin female (DCE arrangement)
• RS485 connector: 5-pin terminal block (screw-insertion type)

●CD485

• External power supply (AC adapter sold separately) or powered via pins 9/14
• RS232C connector: D-sub 25-pin male (DCE arrangement)
• RS485 connector: 5-pin terminal block (M3 screw type)

●CD485-RoHS

• Power supply: External (AC adapter sold separately) or via RS232C pins 9/14
• RS232C connector: D-sub 25-pin male (DCE arrangement)
• RS485 connector: 5-pin terminal block (M3 screw type)

●RS485/P

• Power supply: External (AC adapter) or via RS232C pins 9/14
• RS232C connector: D-sub 25-pin male (DCE arrangement)
• RS485 connector: 5-pin terminal block (M3 screw type)

●CD485-FA

• Noise-resistant product.
• Converter includes lightning surge and static electricity protection.
• RS232C connector: D-sub 9-pin male.
• Max communication speed: 115.2 Kbps.
• Max communication distance: 1200 meters.
• DIN rail mountable.

◆Connection configuration

1.RS232C devices communicate with RS485 devices using a converter.

2. Example of multiple connection of CD485 converters with CD signal collision detection function.

3. Examples of connecting RS485 converters with various power supply modes

◆Product Summary

• Power Supply Options
  RS485/N and RS485/PN draw power from the RS232C signal line.
  RS485P, CD485, and CD485-ROHS are powered via an AC adapter or RS232C pins 9 and 14 (requires RTS or DTR output).
• Electrical Isolation
  RS485/PN, RS485/PV, and RS485P provide optical isolation via photocouplers to prevent noise propagation.
• Communication System
  CD485 and CD485/V use a 2-wire RS485 bus system suitable for low-cost CSMA/CD systems.
• Surge Protection
  Built-in high-speed surge-absorbing silicon elements protect against voltage spikes.
• Performance Specs
  Maximum communication distance: 1200 meters
  Maximum speed: 115.2 Kbps
• Connector Mounting
  Dsub25P (M2.6 × 6 male screw), Dsub9P (#4-40 × 13 UNC screw)
• Termination Options (CD485/V Series)
  CD485/VN: No termination/fail-safe; mid-bus use
  CD485/VT: Termination resistor (390 Ω)
  CD485/VF: Termination resistor (390 Ω) + fail-safe circuit (1K Ω pull-up/down)