{"id":1309,"date":"2025-04-10T09:32:11","date_gmt":"2025-04-10T09:32:11","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&#038;p=1309"},"modified":"2025-04-28T05:11:30","modified_gmt":"2025-04-28T05:11:30","slug":"hd8-connections","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hd8-product-documentation\/hd8-connections\/","title":{"rendered":"HD8: Connections"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"450\" height=\"371\" src=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2025\/04\/hd8_connections.jpg\" alt=\"\" class=\"wp-image-1310\" srcset=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2025\/04\/hd8_connections.jpg 450w, https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2025\/04\/hd8_connections-300x247.jpg 300w, https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2025\/04\/hd8_connections-64x53.jpg 64w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/figure>\n\n\n\n<p>The above picture shows all the connectors used for making external connections to the HD8 These are:<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Bidirectional digital I\/O<\/h6>\n\n\n\n<p>This is a 6-pin connector for the 4 digital I\/O points, which can each be used as an input or an output. The connector has 4 signal pins as well as connection to the positive supply voltage and to common (ground). The wiring for these is detailed separately for\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hd8-product-documentation\/hd8-external-inputs-and-outputs\/hd8-bidirectional-points-used-as-inputs\/\">input mode<\/a>\u00a0and\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hd8-product-documentation\/hd8-external-inputs-and-outputs\/hd8-bidirectional-points-used-as-outputs\/\">output mode<\/a>.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Analog inputs<\/h6>\n\n\n\n<p>These two 2-pin connectors are the analog inputs.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Analog outputs<\/h6>\n\n\n\n<p>A 4-pin connector for two analog outputs.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Power<\/h6>\n\n\n\n<p>This 3-pin connector is for applying power to the HD8. The wiring is described under\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hd8-product-documentation\/hd8-power-supply\/\">HD8 Power supply<\/a>.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Comms<\/h6>\n\n\n\n<p>This is the connector you connect to for programming the HD8. This is NOT an RS232 connector. A PC232 programming cable adaptor is required for connecting to a PC for programming.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Expansion<\/h6>\n\n\n\n<p>This connector is for expansion boards like the\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-expansion-boards\/xbio16-16-bidirectional-i-os\/\">XBIO16<\/a>. The SPx expansion scheme is documented\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/tutorials-application-notes-and-white-papers\/the-splat-expansion-framework\/the-splat-expansion-framework\/external-spx-peripherals\/\">elsewhere<\/a>\u00a0in the SPLat Knowledge Base.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Xwire<\/h6>\n\n\n\n<p>Xwire bus connections. The two connectors are identical and wired in parallel. The lefthand pin as shown is 0V (ground). The righthand pin is bidirectional serial data.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Analog inputs<\/h6>\n\n\n\n<p>These two 2-pin connectors are the analog inputs.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Analog outputs<\/h6>\n\n\n\n<p>A 4-pin connector for two analog outputs.<\/p>\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>The above picture shows all the connectors used for making external connections to the HD8 These are: Bidirectional digital I\/O This is a 6-pin connector&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1300,"menu_order":1,"template":"","class_list":["post-1309","spl_knowledgebase","type-spl_knowledgebase","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>HD8: Connections - SPLat Controls<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HD8: Connections - 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