<html><head></head><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1516684145271_75323"><span></span></div><div id="yui_3_16_0_ym19_1_1516684145271_75323" dir="ltr"><span id="yui_3_16_0_ym19_1_1516684145271_75342">Are you just looking for something ready-made Alan? Voltage divider is an easy/cheap way of measuring voltage. Shunt resistor is best way I've seen for current and there are some that measure up to 50A for $15(US).</span></div><div id="yui_3_16_0_ym19_1_1516684145271_75323" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1516684145271_75323" dir="ltr"><span>Add "arduino" or "raspberry" to your searches and you'll find stuff that will work with any PLC.</span></div><div id="yui_3_16_0_ym19_1_1516684145271_75323" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1516684145271_75323" dir="ltr"><span>Jon</span></div> <div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1516684145271_75747"><br><br></div></div></body></html>