PRODUCT
USB ⇔ RS-422/485
Interface Converter
Interface Converter
SI-35USB
SI-35USB-2
●3000 High-voltage Resistant Isolation type
●SI-35USB-2 is smaller than SI-35USB by 20% and supports the demand for space-saving.
●USB Bus power. No need to have an external power supply.
●Virtual COM port driver supporting Windows® 10 is attached.
●Card-case sized, metal enclosure, noise resitance.
●Able to mount on 35mm DIN rail.
●Lowe power consumption.
●Support 300bps up to 3Mbps.
●Support RS-485 driver control automatically and DTR/RTS line control.
●Monitor RS-485 line and support flow control on CTS line.
●Able to control 128sets maximum as RS-485 multi-drop type.
●Able to extend RS-422/485 up to 1.2Km.
SI-35USB/SI-35USB-2 are USB converter, which converts USB of PC into RS-422/RS-485. 3000V high-voltage resistant isolation ensures the connection between USB and RS-422/RS-485. Supporting wide range of temperature, metal enclosure, and noise resistant make it possible to use in the factories or inspection lab.
Overview
< Size Comparison >
■Block Chart
■Appearance (SI-35USB-2)
The images after the 3rd image are CAD data image.
■Description
RS-422/485 terminal
5 terminals, easy to wire in the site
| Terminal | Name | RS-422(Full duplex)*1 | RS-485(Half duplex)*1 | ||
|---|---|---|---|---|---|
| I/O*2 | Explanation | I/O*2 | Explanation | ||
| 1 | TR+ | O | Transmission data+ | I/O | Send/Receive data+ |
| 2 | TR- | O | Send data- | I/O | Send/Receive data- |
| 3 | GND | - | Signal ground*4 | - | Signal ground*4 |
| 4 | R+ | I | Receive data+ | - | No*3 |
| 5 | R- | I | Receive data- | - | No*3 |
*1: Able to change by Dip switch. (SW-B)
*2: “O”: Output signal from converter. “I”: Input signal toward converter. “I/O”: Both ways.
*3: Do not connect anything when half duplex.
*4: To prevent damage from high voltage on the device, it is recommended to connect the GND between devices.
Dip switch SW-A
| SW1 | SW2 | SW3 | Inner Timer (µSEC) |
Speed(bps) |
|---|---|---|---|---|
| OFF | OFF | OFF | 1350 | More9600 |
| ON | OFF | OFF | 677 | More19200 |
| OFF | ON | OFF | 338 | More38400 |
| ON | ON | OFF | 169 | More76800 |
| OFF | OFF | ON | 85 | More150K |
| ON | OFF | ON | 42 | More300K |
| OFF | ON | ON | 43200 | More300 |
| ON | ON | ON | 5400 | More2400 |
| SW4 | OFF | Make the driver to be active when RS-422/485 transmission. (for RS-485) |
|---|---|---|
| ON | Make RS-422/485 driver to be active when DTR or RTS of virtual COM port is active. (for RS-422) | |
| SW5 | OFF | Make RS-422/485 to be active by DTR of virtual COM port. |
| ON | Make RS-422/485 to be active by RTS of virtual COM port. |
Dip switch SW-B
Set the RS-422/485 communication type and terminal control.
| SW | Function | OFF | ON |
|---|---|---|---|
| SW1 | Echo reception of transmission data | Yes | No |
| SW2 | Communication type | Half duplex | Full duplex |
| SW3 | TXD Terminal resistor | Open | 100Ω |
| SW4 | RXD Terminal resistor | Open | 100Ω |
■Mounting
< Mounting on the DIN rail >
Screw on the bottom using the M3 screw.
