RS232 to RS485 Converters / RS485 to RS232 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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RS232 TO RS485 CONVERTER

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

Model: CVT-485-1
Download Specs. cvt-485-1.pdf

CONVERTER FAQS

~~$59.95~~ $54.95

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

The CVT-485-1 is a port powered RS232 to RS485 converter, which can be used to convert any standard RS232C port into a two-wire RS485 port and vice versa. The unit is powered from the RS232 data line. It also supports data direction auto-turnaround, therefore, no external power or flow control is required.

FEATURES

Plug and play (Hot Pluggable)
CE Certified
Data format Auto-sensing and 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 data line)

SPECIFICATIONS

Compatibility:	EIA/TIA RS232C standard and RS485 standard
Power Source:	Port-powered from RS232 data line
Current Consumption:	Under 10mA
Data Rates:	From 300 Baud to 115.2K Baud - Auto-Sensing & Self-Adjusting
Distance:	RS232 side: 16ft (5m); RS485 side: (Depending on power from RS232 port, will transmit up to 4000ft (1.2km) at 19,200 bps
Connector:	RS232 Side: DB-9 Female - RS485 Side: DB-9 Male or Termination Board: including a DB-9 Female to a 4-Way Termination Block adapter
Maximum number of drops:	128 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 3.4 in (16 x 32 x 86 mm)
Weight:	1.27 oz (36 g)
Operating Temperature:	14°F to 122°F (-10°C to 50°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 Side (DB-9 Male and Jumpers on Termination Board)
Pin	RS485
1	A+
3	B-
5	GND
6	IF shorted (Jumper ON - default) 120 ohms End of Line Terminator in ON
7

RS485 Side Could be connected via DB-9 Male connector (Pin out on top) or the included terminal block attachment.

TERMINATION BOARD

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