![opto232_1.jpg (39436 bytes)](http://www.tri-plc.com/opto232_1.jpg)
Opto232
The Opto232 Program Transfer Adapter is required for programming and monitoring the E10-Relay+ PLC which does not have built-in RS232 port. One end of the adapter is a female DB9 connector that is to be connected to the PC's RS232 serial port. The other end is a 10-pin IDC plug that is to be plugged into the E10-Relay+ PLC's 10-pin programming box-header as shown below:
![](http://www.tri-plc.com/opto232_2.jpg)
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