DSU2-400 - Uncategorized B&B Electronics - Free user manual and instructions
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| Product Type | Serial Data Converter / Adapter |
| Model | DSU2-400 |
| Brand | B&B Electronics |
| Dimensions (approx.) | 10.5 x 7.5 x 2.5 cm |
| Weight | 0.2 kg |
| Power Supply | 9-12 V DC, 500 mA (external adapter) |
| Serial Interface | RS-232, RS-422, RS-485 (selectable via DIP switch) |
| Data Rate | Up to 115.2 kbps |
| Connection Type | DB9 female for RS-232, terminal block for RS-422/485 |
| Protocol Support | Async, 7/8 data bits, parity, stop bits |
| Isolation | 2 kV isolation between ports (estimated) |
| Surge Protection | 15 kV ESD protection on RS-232/422/485 (estimated) |
| LED Indicators | Power, TX, RX for each port |
| Mounting | Desktop or DIN rail mountable (bracket included) |
| Operating Temperature | 0°C to 55°C |
| Humidity | 5% to 95% non-condensing |
| Compliance | CE, FCC Class A |
| Included Accessories | Power adapter, user manual, mounting kit |
Frequently Asked Questions - DSU2-400 B&B Electronics
What is the DSU2-400 used for?
The DSU2-400 is a serial data converter that allows devices with different serial interfaces (RS-232, RS-422, RS-485) to communicate. It is commonly used in industrial automation and data acquisition systems.
How do I select the interface mode?
Use the DIP switches on the device to select between RS-232, RS-422, or RS-485. The switch positions are described in the manual.
What power supply is required?
A 9-12 V DC power supply with at least 500 mA output. Use the included adapter or a compatible one with a center-positive 2.1 mm barrel jack.
Can I use this converter with a DB9 connector?
Yes, the RS-232 port uses a DB9 female connector. For RS-422/485, you need to connect wires to the terminal block.
What is the maximum cable length?
For RS-232, up to 15 meters. For RS-422/485, up to 1200 meters at low baud rates.
The LED indicators are not lighting up. What should I do?
Check that the power adapter is plugged in and supplying voltage. If using a multimeter, verify 9-12 V DC at the barrel connector. If still off, the device may be defective.
How do I connect multiple devices on RS-485?
Use a daisy-chain topology. Connect the A(+) and B(-) terminals of all devices together. Enable the built-in termination resistor on the first and last device using a jumper or switch.
Is the device isolated?
Yes, the DSU2-400 provides 2 kV isolation between the serial ports and the power supply to prevent ground loops and protect equipment.
Can I mount the unit on a DIN rail?
Yes, it comes with a DIN rail mounting bracket. Simply attach it to the back of the device and clip onto a standard 35 mm DIN rail.
Where can I find the user manual?
The manual is available for free download on notice-facile.com. Search for 'DSU2-400 B&B Electronics' and download the PDF.
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