Is the EKI-1511-A a direct replacement for the obsolete EKI-1511L-A?
Hello apinvoice,
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These are very similar, the main difference is going to be the serial interface, the EKI-1511L-A only supports RS-232 while the EKI-1511-A supports RS-232, RS-422 & RS-485. Click HERE for a manufacturer page that compares the two.