Our USB to RS485 converters
We are specialized in making converters for usb, RS485, RS232 and RS422, targeting customers who needs converters that have better quality than the cheap un-isolated, but smaller and less expensive than the industrial types of converters.
All our converters are isolated, powered from the usb side, and with virtual comport drivers.
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| Dublin, Ireland||Jul. 2013|
|Very satisfied with the service and product supplied by Hjelmslund. Very fast response time, even when we required a special assembly. High quality product, worked excellently first time.|
John Clarke - Nines Engineering
Website : Nines-engineering.com
USB485-STISO - 2 wire half duplex RS485 converter.
USB485-STISO : USB to RS485 converter with 2500 volt isolation
Connect your control network to the PC with an isolated RS485 converter, using it as a virtual com port.
Its isolation barrier and readiness for Modbus gives it the quality needed for
use in industrial automation.
2 wire half duplex w. Automatic Rx/Tx switching and Rx/Tx FIFO
for smooth operation - no programming of RTS to set the
direction, and no dip-switches.
USB485-STIXL - as STISO, but larger terminals.
USB485-STISO/STIXL product sheet
Buy USB485-STISO Online
Buy USB485-STIXL Online
USB485-STI4W - 4 wire full duplex RS485 / RS422 converter.
USB485-STI4W : Isolated USB RS485/422 converter
Our 4 wire full duplex model of USB to RS485 converters.
The receiver is always enabled, but the transmitter is only
enabled during data transmission, thus making it possible to use
it even as a slave device.
Drives up to 256 nodes, 1Mbps, 2.5kV isolation voltage.
USB485-STI4W product sheet
USB485-MB45 RS485 with cable and RJ45 - for Modbus.
USB485-MB45 : Isolated RS485 converter with cable and RJ45 for Modbus
The RJ45 is wired according to the
Modbus specifications Ver 1.02 Section 3.5.1
Pin 4 : Data - (B)
Pin 5 : Data+ (A)
Pin 8 : Common
Extremely flexible shielded cable where the shield is connected to Modbus 'common' internally in the converter.
Standard cable length is 3 meter, but 1.5 / 5 / 10 meter versions will be available as well.
USB485-MB45 product sheet
USB232-STISO : Isolated USB to RS232 converter
Our RS232 USB converter supports up to 1Mbps speed and includes 256 bytes Tx FIFO and 128 bytes Rx FIFO for smoother data transmission.
The USB side is electrically isolated from the RS232 interface, hence protecting the PC against electrical fails from your RS232 system.
The isolation protects for fails up to 2500Volt.
Compact - USB powered - Virtual comport drivers.
USB232 product sheet
USB232-STISO Isolated RS232 converter.
USB485-GISO : Panel mount RS485 converter
Superior system separation with panel mounted electrically isolated USB to RS485 converter
Mount it as any other port in your enclosure, with the USB
connection outside and the RS485 cable inside. By placing your
isolation barrier in the cabinet side, you avoid getting USB cables
into your industrial installation, as well as avoiding having industrial
communication near your pc, hence maintaining the best possible system separation.
The perfect match for your PLC installations and industrial communication networks.
The USB to RS485 converter are available in both isolated and non-isolated models.
Our panel mount USB485
USB485-GISO product sheet
USBISO-AA USB isolator and protection device.
USBISO-AA : Driverless USB isolator and protection for USB 2.0 full speed systems.
The USBISO-AA isolator is intended to be used in industrial environments where the host computer needs to be isolated and protected from external surges and electrical interference.
- 1.000 Volt DC isolation
- IEC 61000-4-2 Level 4 ESD Protection
- USB 2.0 Full Speed
- Can deliver 200mA to the external USB device
- No drivers needed, can function on all systems
USBISO-AA product sheet