Two channel converter changes TD and RD RS232 signals to RS422 and extends data up to 1.2 km. It transmits both ways in RS232 and RS422 system. RS232 pinout connects to computer COM port or other DTE device. Port-powered from RS232 DTR and RTS handshake lines - no power supply or SW required.

Two channel converter changes TD and RD RS232 signals to RS422 and extends data up to 1.2 km. It transmits both ways in RS232 and RS422 system. RS232 pin out connects to computer COM port or other DTE device. Port-powered from RS232 DTR and RTS handshake lines. Optional external power.

Model 422LP9R is a port-powered two-channel RS-232 to RS-422 converter. It converts TD and RD RS-232 lines to balanced RS-422 signals. The unit is powered from the RS-232 handshake lines DTR and RTS. One of these handshake lines must be asserted (high) in order to power the unit.

Mode 422LCON, non-isolated RS-232 to RS-422 converter, converts unbalanced RS-232 signals to balanced RS-422 signals. The RS-422 Standard uses a balanced voltage digital interface to allow communications of 90K bits per second on cable lengths of 1200 meters (4000 ft). Ten receivers can be connected to any one driver for use in multi-drop systems.


 
The RS-232 port is a DB25 male connector with pins 2 (TD input) and 3 (RD output) supported.
 
Protective Ground (pin 1) and Signal Ground (pin 7) are also connected. The RS-422 port is a DB25 female connector with Send Data outputs on pins 2 and 14, and Receive Data inputs on pins 5 and 17.  Protective Ground (pin 1) and Signal Ground (pin 7) are connected through to the RS-232 connector. LEDs indicate Transmit Data and Receive Data.

An external power supply is required (not included, sold separately).

Model 422LCOR, non-isolated RS-232 to RS-422 converter, converts unbalanced RS-232 signals to balanced RS-422 signals. The RS-422 Standard uses a balanced voltage digital interface to allow communications of 90K bits per second on cable lengths of 1200 meters (4000 feet). Ten receivers can be connected to any one driver for use in multi-drop systems.


 
The RS-232 port is a DB25 female connector with pins 2 (TD input) and 3 (RD output) supported. Protective Ground (pin 1) and Signal Ground (pin 7) are also connected. The RS-422 port is a DB25 male connector with Send Data outputs on pins 2 and 14, and Receive Data inputs on pins 5 and 17.  Protective Ground (pin 1) and Signal Ground (pin 7) are connected through to the RS-232 connector. LEDs indicate Transmit Data and Receive Data.

Power supply required (not included, sold separately).

Model 422LP25R, RS-232 to RS-422 converter, converts unbalanced RS-232 signals to balanced RS-422 signals. The power used for this converter is derived from the Transmit Data line (pin 2) and the Handshake Control Lines (pins 4, 5, 6, 8, and 20). The converter can derive power from these lines when they are in the Positive or Negative voltage state. This permits the converter to be used in applications without regard to software control of the handshake lines.

If no handshake lines are available and all power must be derived from the Transmit Data line, the converter can drive limited cable lengths. A guide for this condition would be to drive only several hundred feet of transmission line and not to terminate the transmission line with a resistor of less than 1000 Ohms. When more handshake lines are available, longer lengths of cable can be driven. This converter has been tested at 115.2k baud with 1220 meters (4000 feet) of cable.