The USB-4COMi-M 4-Port RS-422 / 485 USB to Serial Adapter combines serial communication signals, RS-422 and RS-485 port with USB technology to allow further expansion of existing serial devices.
Newer PC’s and Laptops are now being manufactured without serial COM ports, because of this, even new technology PC’s or Laptops can utilize this 4-Port RS-422 / RS-485 adapter. The high speed serial adapter carries with it the 128 byte FIFO chip that allows for high speed communication, even in heavy loaded systems.
The serial adapter also allows unusual speed settings like 500.000bps. Our unit’s unique features help to reduce the system load. The USB-4COMi-M utilizes four external DIP switches for easy RS-422, RS-485 mode settings. This device is constructed with industrial metal housing and offers a DIN rail bracket and DIP switch mode settings for RS-485 signals.
Additional Features:
- Automatic transmit and receive control for 2-wire RS-485 half-duplex mode
- Built-in termination and biasing
- Baud Rate from 300bps up to 921.6Kbps supported
- Transmit (TxD) and Receive (RxD) LEDS on unit for visual reference
- Self-powered. One switching power adapter 5V 2A included
- COM port number assigned can be changed to any COM port number required
- Universal Serial Bus (USB) port offers easy plug and Play Operation
- Item Dimensions: 6.63(L) x 3.67(W) x 1.18in(H)
Data Signals Supported:
- RS-422 data signals: TxD-, TxD+, RxD+, RxD-, GND, RTS-, RTS+, CTS+, CTS-
- RS-485 4-wire data signals: TxD-, TxD+, RxD+, RxD-
- RS-485 2-wire data signals: Data-, Data+
OS Support:
- Windows Windows 7, Windows 8, Windows 10
- Linux and Mac OS 10.X
*Surface Mounting screws not included.
Product Specifications
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UPC: 729440690915
Technical Specifications:
| USB Bus | |
| Compliance | USB 1.0/1.1 compliant, USB 2.0 compatible |
| Speed | 12 Mbps, full-speed USB |
| FIFO | 128 byte transmit FIFO 384 receive FIFO |
| Serial Interface | |
| Port Type | RS-422/RS-485 |
| Number of Ports | 4 |
| Connectors | DB9 male |
| Serial Line Protection | |
| ESD Protection | 10KV |
| Serial Port Speed | |
| Baudrate | 300 bps to 921.6k bps |
| Serial Communication Parameters | |
| Data Bits | 5, 6, 7, 8 |
| Stop Bits | 1, 1.5, 2 |
| Parity | None, Even, Odd, Space, Mark |
| Flow Control | RTS/CTS, XON/XOFF |
| Serial Signals | |
| RS-422 | TxD-(A), TxD+(B), RxD+(B), RxD-(A), GND, RTS-(A), RTS+(B), CTS+(B), CTS-(A) |
| RS-485-4 wire | TxD-(A), TxD+(B), RxD+(B), RxD-(A), GND |
| RS-485-2 wire | Data-(A), Data+(B), GND |
| Driver Support | |
| OS | Windows 7, Vista, 2003, XP (WHQL certified) and 2000 Linux Kernel 2.4 and up built-in support |
| Power Supply | |
| Input | Self-powered Power adapter of 5VDC, 2A |
| Mechanical | |
| Chassis | SECC metal chassis with DIN rail bracket |
| Environmental | |
| Operating Temperature | 0 to 55 °C (32 to 131 °F) |
| Operating Humidity | 5 to 95% RH |
| Storage Temperature | -20 to 75 °C (-4 to 167 °F) |
| RS-422 & RS-485 DB9 Male Connector Pin-outs | ||||||||||||||||||||||||||||||||||||||||
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| RS-422 DB9 Male | ||||||||||||||||||||||||||||||||||||||||
| RS-422 Signal Pin-outs of DB-9 Male | ||||||||||||||||||||||||||||||||||||||||
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| RS-485 DB9 Male | ||||||||||||||||||||||||||||||||||||||||
| RS-485 4-Wire (Full duplex) Signal Pin-outs of DB-9 Male Connector | ||||||||||||||||||||||||||||||||||||||||
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| RS-485 2-Wire (Half duplex) Signal Pin-outs of DB-9 Male Connector | ||||||||||||||||||||||||||||||||||||||||
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| RS-422 Signal Wiring | ||||||||||||||||||||||||||||||||||||||||
| Point-to-Point 4 Wire Full Duplex | ||||||||||||||||||||||||||||||||||||||||
USB-4COMi-M RS-422 Device |
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| RS-422 with Handshaking | ||||||||||||||||||||||||||||||||||||||||
USB-4COMi-M RS-422 Device |
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| RS-485 Signal Wiring | ||||||||||||||||||||||||||||||||||||||||
| Point-to-Point 4-Wire Full Duplex | ||||||||||||||||||||||||||||||||||||||||
USB-4COMi-M RS-485 Device |
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| Multidrop RS-485 2-Wire Half-duplex | ||||||||||||||||||||||||||||||||||||||||
USB-4COMi-M RS-485 Device |
