Isolated in-line serial converters – B&B Electronics 485OI9TB - Datasheet User Manual
Page 2
International Office: 707 Dayton Road PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104
European Office: Westlink Commercial Park Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445
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
FCC Part 15, CISPR, EN 55022: 2010 + AC:2011 Class B Emissions
CE
EN 61000-6-1: 2007 Generic Standards for Residential, Commercial and Light-
Industrial Environments
EN 61000-4-2: 2009 Electro-Static Discharge (ESD)
meChaniCaL Diagram
isolated in-line Serial Converters
4WSD9OTB, 4WSD25OTB
Isolated 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.
• Modbus compatible serial conversion
• Removable terminal blocks for RS-422/485
• 2,000V two-way optical isolation
• Automatic Send Data Control - no software
drivers necessary
• Accepts external power from 10-48 VDC
proDuCt FeatureS
aCCeSSorieS
485PS2 - 12VDC@100mA wall transformer power supply, tinned stripped leads
7175 - 2 position 3.5MM Replacement Terminal Block (power, included)
7372 - 5 position 3.5MM Replacement Terminal Block (data, included)
TBKT4 - 5 position 3.5MM Replacement Terminal Block
9PAMF6 - 6 ft. (1.8 m) RS-232 Serial Cable
E1250BL-BB3 - 12VDC @ 500MA European wall transformer power supply,
tinned stripped leads
MMNM9 - DB9 male to DB9 male Null Modem Adapter
orDering inFormation
Model nuMber
rs-232 ConneCtor
rs-485 ConneCtor
4WSD9OTB
DB9 Female
Removable Terminal Blocks
4WSD25OTB
DB25 Female
Removable Terminal Blocks
9.8 cm
3.9 in
4.3 cm
1.7 in
2.3 cm
0.9 in
9.8 cm
3.9 in
4.3 cm
1.7 in
2.3 cm
0.9 in