COM-1PD2-USB

COM-1PD2-USB

COM-1PD2-USB | Isolated USB to RS-422A/485 Converter | Contec Americas Contact Sales Department for Pricing New COM-1PD2-USB Isolated USB Converter RS-422A/485 921,600 bps USB 2.0 Bus Power VCCI-A · FCC-A · CE · UKCA Isolated USB to RS-422A/485 serial converter with 921,600 bps support, 3000V isolation, and surge protection. USB...
Vendor: Contec Americas
SKU: LRLR54
Availability: 15 In stock
Product type: Accessory
¥472.00
¥1,330.00
¥472.00
Subtotal: ¥472.00
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Datasheet

COM-1PD2-USB

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Description
COM-1PD2-USB | Isolated USB to RS-422A/485 Converter | Contec Americas
New COM-1PD2-USB Isolated USB Converter RS-422A/485 921,600 bps USB 2.0 Bus Power VCCI-A · FCC-A · CE · UKCA

Isolated USB to RS-422A/485 serial converter with 921,600 bps support, 3000V isolation, and surge protection. USB 2.0 bus-powered, 128/384 byte FIFO, and up to 127 units per PC. Compatible with Windows/Linux and successor to COM-1PD(USB)H for easy migration.

921.6k bps Max Baud Rate
3000V Isolation Voltage
1ch RS-422A/485 Port
128/384 TX/RX Buffer (bytes)
Contec Americas · Serial Communication
USB to RS-422A/485 Converter
COM-1PD2-USB · Isolated · 921.6 kbps · USB 2.0
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Isolated USB to
RS-422A/485 Conversion

The COM-1PD2-USB converts a USB port of a PC into an RS-422A/485 serial communications port. The product features isolation between the PC and bus line as well as surge protection circuits on communication ports, providing excellent noise immunity for industrial applications. It supports baud rates up to 921,600 bps and includes separate 128-byte transmit and 384-byte receive FIFO buffer memory.

Standard USB-Serial Adapter
  • No electrical isolation
  • Limited surge protection
  • Lower max baud rate (typical 115.2k)
  • Small or no FIFO buffer
COM-1PD2-USB Features
  • 3000V isolation between PC and bus
  • Surge protection on communication ports
  • 921.6 kbps max baud rate
  • 128/384 byte TX/RX FIFO buffers

Electric isolation is provided between the PC and the RS-422A/485 bus line. This prevents electric noise from affecting the PC and external circuits. The product is a successor to COM-1PD(USB)H, with compatibility in dimensions, connectors, signal layout, and software.

High-Speed &
Reliable Communication

Engineered for industrial serial communication, the COM-1PD2-USB delivers high-speed performance, flexible installation, and robust connectivity.

  • High-speed baud rate — Supports up to 921,600 bps for fast data transfer.
  • USB 2.0/1.1 compatible — Full Speed (12 Mbps) USB transmission.
  • Bus powered — No external power supply required; operates from USB bus power.
  • Large FIFO buffers — 128-byte transmit and 384-byte receive buffers to reduce CPU load.
  • Up to 127 converters per PC — Use USB hubs to connect multiple converters.
  • Software control of RS-422A/485 lines — RTS+, RTS-, CTS+, CTS- can be controlled and monitored via software.

Full Specifications

Specification Detail
Model COM-1PD2-USB
Number of Channels 1 channel
Interface Type RS-422A/RS-485
Isolation Bus isolation (3000V DC)
Transfer Method Asynchronous serial (full-duplex / half-duplex)
Baud Rate 300 – 921,600 bps (software selectable)
Data Length 7, 8 bits
Stop Bits 1, 2 bits
Parity Even, Odd, None
Controller Chip XR21V1410
Buffer Memory Transmit 128 bytes / Receive 384 bytes (FIFO)
Connecting Distance Within 1200 m (depending on cable and terminator)
USB Specification USB 2.0/1.1, Full Speed (12 Mbps)
Power Supply Bus power only (5V ±5%)
Power Consumption 5VDC 350 mA (max)
USB Cable Length 1.8 m
Dimensions (mm) 68.3 (W) x 20.5 (D) x 36.5 (H)
Weight 130 g
Operating Temperature 0 – 50°C
Operating Humidity 10 – 90% RH (no condensation)
Certifications VCCI Class A, FCC Class A, CE (EMC Class A, RoHS), UKCA
Connector (RS-422A/485) 9-pin D-SUB (male)
Connector (USB) USB Type-A

Connections &
Configuration

The COM-1PD2-USB features a 9-pin D-SUB connector (male) for RS-422A/485 connections and a USB Type-A connector for connection to the PC.

  • RS-422A/485 Interface — Differential transmission with twisted-pair cable for improved noise immunity.
  • Pin assignment — Pin 1: CTS-, Pin 2: RTS+, Pin 3: RxD+, Pin 4: RxD-, Pin 5: TxD+, Pin 6: SG, Pin 7: CTS+, Pin 8: RTS-, Pin 9: TxD-.
  • Terminator and mode setting — DIP switch for data transmission mode and terminator resistor selection.
  • Full-duplex mode — Supports connection with RTS and CTS to external device, or self-looping.
  • Half-duplex mode — Simplified connection for 2-wire communication.

Note: The pin assignment for CTS uses even-numbered pins for negative and odd-numbered pins for positive — this is not a description error.

Certifications and
Compliance

  • VCCI Class A — Japanese voluntary control for electromagnetic interference (commercial and industrial environments).
  • FCC Class A — U.S. emissions compliance for industrial use environments.
  • CE (EMC Directive Class A + RoHS Directive) — European conformity for electromagnetic compatibility and restriction of hazardous substances.
  • UKCA — UK Conformity Assessed marking for UK market compliance.

Optional Accessories

No optional accessories are listed in the product datasheet. Contact Contec Americas for available cables and mounting accessories.

Part Number Description Note
— No optional products specified Contact sales for recommendations

Ready to add isolated serial communication?

The COM-1PD2-USB is available through Contec Americas on a quote basis. Contact our sales team to discuss your application, quantity requirements, and integration needs.

Tags COM-1PD2-USB USB to RS-422A/485 Isolated USB Converter Serial Converter RS-422A/485 Industrial Serial 921.6 kbps USB 2.0 Bus Powered Contec Americas VCCI-A FCC-A CE UKCA

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