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This Loops RS232 Null Modem Adapter is designed for users needing to connect two devices that typically require a direct serial connection, such as for data transfer or updating firmware. Its key benefit is enabling PC-to-PC communication or connecting compatible devices like satellite receivers. A caveat is that it requires an understanding of serial communication and wiring configurations for proper use.
| Series | RS232 |
|---|---|
| Brand | Loops |
A null modem adapter is used to connect two DTE (Data Terminal Equipment) devices, such as two computers, directly to each other using their serial ports. It accomplishes this by crossing the transmit (TX) and receive (RX) data lines.
This adapter works with standard RS232 serial cables. It is designed to convert a straight-through cable into a null modem setup. Ensure you are using the correct type of serial cable for your intended connection.
In serial communications, a null modem refers to a crossover connection that allows two DTE devices to communicate directly without needing a DCE (Data Communications Equipment) device like a modem in between.
The adapter crosses specific transmit and receive lines, and also handshake lines, allowing the transmitted data from one device to be received by the other, and vice-versa, mimicking a modem connection.
No, this is a passive adapter and does not require any external power source. It relies on the serial port's signals.
Generally, no. Printers typically require a direct (straight-through) serial connection or a USB connection. A null modem adapter is for device-to-device serial communication.
The wiring is as follows: Pin 1 to Pin 6 & 4, Pin 2 to Pin 3, Pin 3 to Pin 2, Pin 4 to Pin 1 & 6, Pin 5 to Pin 5, Pin 6 to Pin 4 & 1, Pin 7 to Pin 8, Pin 8 to Pin 7, Pin 9 - Not Connected.
Ensure the adapter is securely connected to both devices/cables. Verify that the serial ports on both devices are functional and enabled. Confirm that the correct null modem wiring configuration is being used for your specific application; this adapter assumes a null modem configuration is desired. Check if the serial port drivers are installed correctly on your computer.
Inspect the serial cables for damage. Try using a different, known-good serial cable. Ensure that the baud rate and other serial communication parameters (data bits, parity, stop bits) are set identically on both connected devices. Reduce the cable length if possible.
Refer to the documentation for both devices being connected. Some devices may have specific requirements for null modem adapters or communication settings. Ensure the adapter is not being used in a scenario where a straight-through connection is required.
Setup:
Compatibility:
This adapter is compatible with any devices featuring standard RS232 DB9 serial ports. Its functionality is dependent on the devices initiating communication and the overall cable configuration.
Care:
