Optoisolated RS232 to RS422 Converters

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Sima S. Enterprises offers the finest quality CommFront USB, RS-232, RS-485, RS-422, and TTL converter products available on the market. All of our products are CE Certified and come with a 30 day satisfaction guarantee and a 2 year workmanship warranty.

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OPTO-ISOLATED PORT POWERED RS232 TO RS485 / RS422 CONVERTER

"Simple and Hassle-Free Operation
Completely Auto-Sensing and Self-Adjusting
No Manual Settings Necessary At All"

Model: CVT-485_422-3
Download Specs. cvt-485_422-3.pdf

CONVERTER FAQS

~~$94.95~~ $89.95

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RS232 DB-9 Female To RS485 / RS422
DB-9 Male or Terminal Block

The CVT-485_422-3 is a port powered optically isolated RS232 to RS485 / RS422 converter, which can be used to convert any standard RS-232C port into a two-wire half-duplex RS485 port or a four wire full-duplex RS422 port and vice versa. This converter features optical isolation circuitry, which effectively protect your RS232 devices from transient surges, ground loop, and remote lightning. This converter is powered from the RS232 data line; it also supports data direction auto-turnaround. No external power or flow control is required.

FEATURES

CE Certified
Optical isolation effectively protects RS232 devices from transient surges, ground loop, and remote lightning
Optical isolation eliminates ground loop and noise problems
Plug and play (Hot Pluggable)
Data format Auto-sensing & Self-adjusting
Port-powered, no external power or RTS, CTS, DTR, DSR required
Data direction auto-turnaround, no flow control is required
SMT Technology
Built-in Terminating Resistor (120 ohms)
Built-in Anti-Static protection circuit
Built-in Short Circuit protection (RS485/RS422 data line)

SPECIFICATIONS

Compatibility:	EIA/TIA RS232C standard and RS485 / RS422 standard
Power Source:	Port-powered from RS232 data line
Current Consumption:	Under 10mA
Optical Isolation:	2000 Volts
Data Rates:	From 300 Baud to 19.2K Baud - Auto-Sensing & Self-Adjusting
Distance:	RS232: 16ft (5m); RS485/RS422: Depending on power from RS232 port, will transmit up to 4000ft (1.2km) at 19,200 bps
Connector:	RS232 Side: DB-9 Female: RS485/RS422 Side: DB-9 Male or Termination Board including DB-9 Female to a 6-Way Termination Block adapter
Maximum number of drops:	64 Drops
End of Line Terminator:	120 ohms (Built-in)
Anti-Static Protection:	Up to 15KV
Dimensions (H x W x D):	0.63 x 1.3. x 3.5 in (16 x 32 x 90 mm)
Weight:	1.37 oz (39 g)
Operating Temperature:	-4°F to 158°F (-20°C to 70°C)
Operating Humidity:	Up to 90% RH (no condensation)

CONVERTER CONNECTORS PIN ASSIGNMENTS

RS232 Side (DB-9 Female Connector)
Pin	Function
1	Tied Together
4
6
7	Tied Together
8	Tied Together
2	TX
3	RX
5	GND

RS485/RS422 Side Could be connected via DB-9 Male connector (Pin out to the right) or the included terminal block attachment.

RS485/RS422 Side (DB-9 Male and Jumpers on Termination Board)
Pin	Jumper	RS485	RS422
1	J2 (default: ON)	A+ (J2 ON)	TX+ (J2 OFF)
2			RX+ (J2 OFF)
3	J3 (default: ON)	B- (J3 ON)	TX- (J3 OFF)
4			RX- (J3 OFF)
5		GND	GND
6	J1 (default: ON)	(J1 ON)	(J1 OFF)
7
8	J4 (default: ON)	J4 ON To turn on 120 ohms End of Line Terminator
4

TERMINATION BOARD

Numbers on the left hand side indicate the pin assignment of DB-9 Male Connector (RS485 / RS422 side)
DO NOT connect external power to +5V pin, it is for measurement only. The unit will function correctly only when the voltage on +5V pin is around +5V (when RS232 port is connected).
The unit comes with a built-in 120 ohm End of Line Terminator; use it (jumper J4 ON) only when the distance is over 660ft (200m)

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RS232-CONVERTERS.COM

Sima S. Enterprises LLC
1298 Evans Road
Wall Township, NJ 07719

PHONE: 1-877-647-7434
FAX: 732-749-3598

email: sales@simaenterprises.com