Yes, the OPTO-4 is a direct replacement for the PC-OPTO-3. The functionality is the same, please see the data sheet for the physical differences on the OPTO-4 downloads page...
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Yes, simply connect the OPTO-4 female 9 pin connector to the male 9 pin connector of the USB to Serial Cable. The OPTO-4 will continue to provide isolation between the NMEA 0183 Talker and the PC. The USB to serial converter must support...
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This is possible when connecting the wire ends together, but not when connecting the DB9 connectors together. Connecting the DB9 9 pin connectors together will remove the isolation, connecting the ground of both devices together...
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The RS232 end is a female 9-pin D-Sub DB9 connector following the standard 9-pin RS232 pin out specification...
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Yes, but you will need to provide power to the 9 pin connector (DB9) independently. Instructions for this are explained in the Quick Start Guide on the OPTO-4 downloads page...
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No, only the RS232 (PC) input is isolated from the NMEA 0183 Talker. An NMEA 0183 Listener connected to the RS232 (PC) output must have an isolated input. For bi-directional isolation, two OPTO-4 cables can be connected back to back...
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Isolation is provided between the NMEA Talker ground and the Listeners RS232 ground...
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The OPTO-4 cable converts the RS422 / RS485 (NMEA) voltage levels to RS232 (PC) voltage levels. Any data type can be transferred by the OPTO-4 using these voltage levels...
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The NMEA 0183 specification, from version 2 and higher, requires devices to be isolated on their input lines. The OPTO-4 allows an RS232 input connection to meet these NMEA 0183 Listener specifications...
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