RSLink2 Logic level to RS-232 Converter

Last Updated 5 January 2008

The RSLink2 converts between typical microcontroller logic level UART signals and the true RS-232 signals required to communicate with a standard PC COM port.  On the microcontroller side it connects to ground, power, and the logic level receive and transmit lines.  The RS-232 interface is via a female DB-9 connector.  It can be connected to a standard PC COM port with a straight thru extension cable. 

The RSLink2 works with 3.3 and 5 volt systems, whereas the RSLink is only for 5 volt systems. 


Purchase

Individual units, $20 each

For shipping to the United States.  A flat fee of $8.00 will be charged for shipping and handling. 

For shipping to all other destinations.  A flat fee of $25.00 will be charged for shipping and handling. 

Packs of 5 units, $69/pack

For shipping to the United States.  A flat fee of $8.00 will be charged for shipping and handling the first 5-pack, and $2.00 each additional 5-pack in the same order. 

For shipping to all other destinations.  A flat fee of $25.00 will be charged for shipping and handling the first 5-pack, and $3.00 for each additional 5-pack in the same order. 

Specifications

  • Microcontroller signals: Ground to power logic levels.  Line idle is high, active is low. 

  • PC signals: Standard RS-232 compatible with PC COM port, for example.  Line idle is low, active is high.  Pin 2 is the transmit line (out from RSLink2), pin 3 the receive line (in to RSLink2), and pin 5 is ground.  The RTS line is looped back to CTS (pin 7 connected to pin 8).  No other pins are connected.  The pinout is directly compatible with a standard PC COM port.  You could plug a RSLink2 directly into a PC COM port, or use a "straight thru" extension cable. 

  • Power: Supplied by microcontroller interface.  Requires 3.0 to 5.5 volts at 15mA maximum. 

  • Microcontroller connections: 4 pin locking header, intended to mate with Molex 22-01-3047 or equivalent, available from Jameco as 234819 with pins 234923, or DigiKey as WM2002-ND with pins WM1114-ND. 

  • Speed: 250Kbits/second maximum. 

  • Size: Circuit board is 1.35 x 1.2 inches (34 x 30 mm).  Whole unit is 1.6 x 1.2 x 0.6 inches (41 x 30 x 16 mm). 

  • Temperature: 0-70 degrees Celsius operating range. 

  • Two layer circuit board with bottom layer ground plane. 

Documentation