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Isolated Serial Converter for Power Utility Communications

Benefits of Send Data Control (SDC)?

As operating systems become more complex, it is increasingly difficult to control an RS-485 driver with standard software and the RTS line. This is especially true in Windows and multi-tasking operating systems.

With B&B’s Automatic Send Data Control circuit, driver control is in the converter hardware, so you don’t have to work with software at all. The circuit monitors data flow and enables the driver during transmission and automatically disables it when no data is being sent. There is no need to rework software or install new drivers.

Most B&B Electronics RS-232 to RS-485 converters and RS-485 serial cards include Automatic Send Data Control.

Home > Products > Serial Connectivity > Serial Converters > Isolated RS-232/422/485 Serial Converters > Isolated Converters

Isolated Converters protect equipment from damaging spikes and surges

Models 4WSD9OTB and 4WSD25OTB are top-of-the-line converters with both 2000 Volts isolation. Removable terminal blocks on the RS-422/485 side make installation easy. Dip switches are used for configuration. LEDs indicate data traffic. Modbus compatible. Power is provided through a 10-48 VDC input on the terminal block.

Model 485OI9TB is a basic isolated converter. The RS-232 side draws power from the RS-232 handshake lines of the connected PC. At least one handshake line must be asserted (high) to power the converter. If high handshake lines aren't available, model 4WSD9OTB is recommended. The RS-422/485 side is powered by an external power supply.

Models 485DRCI and 485LDRC9 are DIN Rail mount, wide temp versions of the 4WSD9OTB and 4WSD25OTB.

General Features

Wide temperature ranges (-40 to 80° C)
Modbus ASCII or RTU compatible
Automatic Send Data Control
DIN rail mount
Extend distance up to 4,000 feet
Addressing up to 32 nodes

Model Number	RS-232 Connector	RS-485 Connector	Power Supply	Special Features		Price Change to GBP
4WSD9OTB	DB9 Female	Terminal Block	PS2EU-1000 or PS2UK-1000	115.2 kbps, LEDs on TD & RD, removable terminal blocks	Datasheet Photo Accessory List	Euro 92.97
4WSD25OTB	DB25 Female	Terminal Block	PS2EU-1000 or PS2UK-1000	115.2 kbps, LEDs on TD & RD, removable terminal blocks	Datasheet Photo Accessory List	Euro 92.97
485OI9TB	DB9 Female	Terminal Block	PS2EU-1000 or PS2UK-1000	115.2 kpbs, Requires high handshake lines for power	Datasheet Dimensions Figure DoC Photo Accessory List	Euro 69.53
485DRCI	DB9 Female	Terminal Block	MDR-20-12 or MDR-20-24	DIN Rail Mount Case	DXF 3D Drawing Mechanical Drawing Quick Start Guide Datasheet DoC Photo Accessory List	Euro 155.47
485LDRC9	DB9 Female or Terminal Block	Terminal Block	MDR-20-12 or MDR-20-24	DIN Rail Mount Case	DXF 3D Drawing Mechanical Drawing Terminals Datasheet Quick Start Guide Tech Note - Baud Rate Change Troubleshooting DoC Photo Accessory List	Euro 116.41
New! DRPM25	Panel Mount Adapter				Diagram Photo	Euro 10.94

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