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What are the major differences between the SyMax 8030ROM221 and 8030ROM271 output modules?

Both the SyMax 8030ROM221 and 8030ROM271 are 16 point isolated output modules. The Major difference is that the 8030ROM221 has optically isolated outputs and the 8030ROM271 has relay isolated outputs. There are some other specification differences, please refer to the individual module specification sheets.

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