Advantech BB-4WSD9R / BB-4WSD9TB

Models 4WSD9TB and 4WSD9R, universal serial converters, provide RS-232 to RS-422/RS-485 conversion using either port-power or an external power supply. Model 4WSD9TB has a terminal block RS-485 connector; Model 4WSD9R has a DB9 female RS-485 connector.

Data is converted in both directions, RS-232 Transmit Data is converted to balanced RS-422 or RS-485 Transmit Data. Received RS-422/485 signals are converted to RS-232. Unlike converters which require programming hardware handshaking signals to control RS-422 or RS-485 operation, Models 4WSD9TB and 4WSD9R provide automatic Send Data Control. In RS-485 mode, the RS-485 driver is enabled by circuitry which senses the RS-232 TD input. In half-duplex RS-485 mode, the receiver is enabled when not transmitting. For full-duplex operation, the receiver is set always enabled.

In RS-422 mode, the transmitter and receiver are always enabled. The operating mode is set with 4 switches see Table 1. The converters are powered by the RS-232 signal lines whether they are set high or low. If not enough power is available from the port, or no handshaking lines are available, a DC jack is provided to connect an external 12VDC supply. The DB9 female connector for RS-232 is wired as DCE (like a modem).

SPECIFICATIONS

SERIAL TECHNOLOGY
Data Rate	115.2 kbps maximum
RS-232
Connector	4WSD9R: DB9 female 4WSD9TB: DB9 female
Signals / Port Power *	RD, TD, GND supported. Pins 7 (RTS) and 8 (CTS) are tied together. Pins 6 (DSR), 1 (DCD), and 4 (DTR) are tied together.
RS-422/485
Connector	4WSD9R: DB9 female 4WSD9TB: Terminal block
Biasing Resistors	4.7k Ohms
Signals	TDA (-), TDB (+), RDA (-), RDB (+), GND
Termination	None
Operation	Dipswitch selectable RS-422 or RS-485 4WSD9R: RS-485 2 or 4-wire or RS-422 4WSD9TB: RS-485 2 or 4-wire or RS-422
POWER
Source	Port-powered: from RS-232 handshake lines. External 12 VDC power supply, optional.
* Port-Power	Port-powering requires 7 to 12 VDC supplied on at least one handshake line.
Power Connector	2.5 mm plug (tip positive)
Input Voltage	12 VDC
MECHANICAL
Dimensions	4WSD9R: 7.8 x 4.3 x 2.0 cm (3.0 x 1.6 x 0.8 in) 4WSD9TB: 9.0 x 4.3 x 2.3 cm (3.6 x 1.7 x 0.9 in)
Enclosure	Plastic, Inline
Weight	4WSD9R: 49 g (0.10 lbs.) 4WSD9TB: 50 g (0.11 lbs.)
MTBF	4WSD9R: 880179 4WSD9TB: 345242
MTBF Calc. Method	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)
Operating Humidity	0 - 95% Non-condensing
DECLARATION OF CONFORMITY - 4WSD9R FCC, CE
	FCC, CE
Directives	2014/30/EC - Electromagnetic Compatibility Directive
	2011/65/EU - Reduction of Hazardous Substances Directive (RoHS)
	2012/19/EU - Waste Electrical and Electronic Equipment (WEEE)
EMC Standards	EN55032 - Information Technology Equipment - Class B RF Emissions
	EN55024 - Information Technology Equipment - Immunity (LightIndustrial Environments)
DECLARATION OF CONFORMITY - 4WSD9TB
	FCC, CE
Directives	2014/30/EC - Electromagnetic Compatibility Directive
	2011/65/EU - Reduction of Hazardous Substances Directive (RoHS)
	2012/19/EU - Waste Electrical and Electronic Equipment (WEEE)
EMC Standards	EN55022:2010+AC - Information Technology Equipment - Class B RF Emissions
	EN55024 - Information Technology Equipment - Immunity (LightIndustrial Environments)
	EN61000-4-2 - ESD Immunity
	EN61000-4-3 - Radiated Immunity
	EN61000-4-4 - EFT/Burst Immunity
	EN61000-4-6 - RF Conducted Immunity

ORDERING INFORMATION

MODEL NUMBER	RS-232 CONNECTOR (DCE)	RS-485 CONNECTOR	OUTPUT	OPTIONAL POWER SUPPLY
4WSD9R	DB9 Female	DB9 Female	RS-485 2 or 4-wire or RS-422	X
4WSD9TB	DB9 Female	Terminal Block	RS-485 2 or 4-wire or RS-422	X