Advantech BB-4WSD25OTB / BB-4WSD9OTB

Models 4WSD9OTB and 4WSD25OTB convert RS-232 to RS-422 or RS-485 (2 or 4-wire). 2,000V two-way optical isolation protects devices from power surges, spikes and ground loops in harsh electrical environments.

These in-line converters support distances up to 1,200 m (4000 ft.) and data rates up to 115.2 kbps. Switchable modes support 2-wire RS-485, 4-wire RS-485, and full duplex RS-422. Available with female DB9 or DB25 RS-232 inputs.

Removable terminal blocks for RS-422/485 and external power make wiring easy. Accepts external power from 10-48 VDC from an industrial power source or plug in power supply. The power supply is sold separately.

SPECIFICATIONS

SERIAL TECHNOLOGY
Data Rate	115.2 kbps maximum
LED Indicators	TD and RD
RS-232
Connectors	4WSD9OTB: DB9 female 4WSD25OTB: DB25 female
Signals	TD, RD, GND
RS-422/485
Connector	4WSD9OTB: Terminal block, removable 4WSD25OTB: Terminal block, removable
RS-485, 2-wire	Data A(-), Data B (+), GND
RS-422/485, 4-wire	TDA(-), TDB(+), RDA (-), RDB(+), GND
POWER
Input Required	10-48 VDC
Current Draw	28 mA at 12 VDC (typical)
MECHANICAL
Dimensions, 4WSD9OTB	9.8 x 4.3 x 2.3 cm (3.9 x 1.7 x 0.9 in)
Dimensions, 4WSD25OTB	9.8 x 5.5 x 2.3 cm (3.9 x 2.2 x 0.9 in)
MTBF	179604
MTBF Calculation Method	MIL 217F Parts Count Reliability Prediction
ENVIRONMENTAL
Operating Temperature	0 to +70 °C (+32 to +158 °F)
Storage Temperature	-40 to +85 °C (-40 to +185 °F)
APPROVALS / CERTIFICATIONS - 4WSD9OTB, 4WSD25OTB
2004/108/EC	Electromagnetic Compatibility Directive
2011/65/EU	Reduction of Hazardous Substances Directive
EN 55022: +AC	Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement
EN 61000-1-1	Generic Standards for Residential, Commercial and Light-Industrial Environments
EN61000-4-2	ESD Immunity
EN61000-4-3: +A1 +A2	Radiated Immunity
EN61000-4-4	EFT/Burst immunity
EN61000-4-6	RF Conducted Immunity

ORDERING INFORMATION

MODEL NUMBER	RS-232 CONNECTOR	RS-485 CONNECTOR
4WSD9OTB	DB9 Female	Removable Terminal Blocks
4WSD25OTB	DB25 Female	Removable Terminal Blocks