[ Composition ]
Converter: 1
USB cable: 1
Utility CD: 1
Instruction Manual: 1 ( in Japanese only)
Warranty: 1
[ CASE ]
SI-35USB-2 is an 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.
Feature
Downsizing the conventional model
- Downsizing SI-35USB by 20% and supports the demand for space-saving.
- 3000 High-voltage Resistant Isolation type
- USB Bus power. No need to have an external power supply.
- Virtual COM port driver supporting Windows® 10 is attached.
- Able to use in the severe conditions of -20 to 60 degree Celsius.
- 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.
Block diagram
Appearance
The images after the 3rd image are CAD data image.
Description
Pin Assignment
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 | Transmission/Reception data+ |
| 2 | TR- | O | Transmission data- | I/O | Transmission/Reception data- |
| 3 | GND | - | Signal ground*4 | - | Signal ground*4 |
| 4 | R+ | I | Reception data+ | - | No*3 |
| 5 | R- | I | Reception 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
Set the RS-422/485 driver control and internal timer value for line monitoring.
|
|
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.
Specifications
| Conversion | USB⇔RS-422/485 |
|---|---|
| USB Interface | USB1.1/2.0, full speed transmission B connector |
| LED | Transmission: TXD, Reception: RXD, Power: PWR |
| Serial Interface | RS-422/485, Full duplex/ Half duplex 5 pole terminal block (press-to-screw pitch type) Fitness wire: AWG24-14*1 |
| Serial Signal | TXD, RXD or TXD/RXD |
| Asynch type | Asynch |
| Baud Rate | 300bps to 3Mbps*2 |
| Data Frame | Data bits[7or8] + Parity[Even/Odd/none] + Stop bits[1/2] |
| Flow Control | Xon/off, RTS/CTS (supported by COM port emulator) |
| RS-485 Monitor | Monitor non-communication on RS-485*3 |
| RS-485 Driver Control | Control RS-485 driver to be active. (for transmission only)*4 |
| Multi-drop connection | Max. 128 sets |
| Mounting method | Using M3 screw hole in the bottom face, installation to a DIN rail (SI-DIN70 is required.), wall hanging by SI-WM1(option), installation to metal wall by magnets SI-MG70(option) |
| Signal Isolation Protection | 3000Vdc |
| System requirements (USB equipment) |
PC: PC/AT compatible with USB port (DOS/V PC) OS: Windows® 7/8/8.1/10*5 |
| Power | USB Bus power, DC5V±10%, Max. 100mA |
| Power Consumption | 1.3W or less |
| Temperature | In operation: -20 to 60°C, In storage: -20 to 75°C |
| Humidity | In operation: 10 to 90%RH In storage: 10 to 90%RH (No condensation) |
| Standard | CE(class A), EMC(EN61326-1:2013) |
| Dimension | 58(W)×80(D)×22.5(H)mm |
| Weight | Approx. 160g |
| Composition | USB cable (1.8m), Utility CD, Instruction manual (in Japanese only), Warranty. |
*1: Single wire: 0.2-2.5 mm2. Stranded wire: 0.2-1.5 mm2.
*2: Speed is established in application software. Certain speed beyond 1.2Mbps cannot be established.
*3: Half duplex RS-485 communication requires data transmission while none of other equipments transmit data on RS-485. SI-35USB-2 monitor function sends signal to CTS of the virtual COM port, when designated non-communication period was detected. By this, communication control precession in the PC side is simplified.
*4: Half duplex RS-485 communication needs to activate RS-485 driver only to transmit data. SI-35USB-2 driver auto-control activates the driver IC on the top of transmitted data, and makes it to be non-active after the last data automatically.
*5: Supports 32bit/64bit of Windows 7/8/8.1/10