{"id":1329,"date":"2017-11-20T11:04:48","date_gmt":"2017-11-20T17:04:48","guid":{"rendered":"https:\/\/scadametrics.com\/blog\/?p=1329"},"modified":"2022-10-15T15:58:55","modified_gmt":"2022-10-15T21:58:55","slug":"how-to-buffer-a-pulse-input-to-the-ethermeter","status":"publish","type":"post","link":"https:\/\/scadametrics.com\/blog\/?p=1329","title":{"rendered":"How to Buffer and Amplify a Pulse Input to the EtherMeter"},"content":{"rendered":"
\"James

Jim ‘Slim’ Mimlitz, SCADAmetrics<\/p><\/div>\n

When interfacing an open-collector pulse output<\/strong> signal from a flow meter<\/strong> to an EtherMeter<\/strong>, it can sometimes be necessary to provide an electronic isolation & amplification buffer<\/strong> between the flow meter and the EtherMeter.<\/p>\n

For example \u2014 if the open-collector does not have sufficiently low impedance when it is in the closed state (or if the open-collector does not have sufficiently high impedance when it is in the open state), then the EtherMeter might not detect the pulses.<\/p>\n

One solution is to add an interposing solid-state relay into the circuit to provide isolation and amplification.<\/p>\n

The diagram below illustrates the details.\u00a0 Click on the image to zoom in.<\/p>\n

Important Note: in the circuit illustrated below, 3.2 milliamps will pass through the meter’s open-collector circuit when closed. Please ensure that 3.2 milliamps does not exceed the specified maximum current capacity of your open-collector pulse circuit!<\/strong><\/p>\n

\"\"<\/a>

Pulse Isolation and Amplification Circuit.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

When interfacing an open-collector pulse output signal from a flow meter to an EtherMeter, it can sometimes be necessary to provide an electronic isolation & amplification buffer between the flow meter and the EtherMeter. For example \u2014 if the open-collector does not have sufficiently low impedance when it is in the closed state (or if …<\/span> Read More →<\/span><\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":1350,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,8,4],"tags":[189,188,190],"class_list":["post-1329","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-applications","category-general","category-meteringtechnology","tag-open-collector","tag-pulse-input","tag-pulse-isolation"],"_links":{"self":[{"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1329","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1329"}],"version-history":[{"count":18,"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1329\/revisions"}],"predecessor-version":[{"id":2410,"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1329\/revisions\/2410"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=\/wp\/v2\/media\/1350"}],"wp:attachment":[{"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scadametrics.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}