{"id":1511,"date":"2025-04-11T06:15:34","date_gmt":"2025-04-11T06:15:34","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&#038;p=1511"},"modified":"2025-06-10T06:41:59","modified_gmt":"2025-06-10T06:41:59","slug":"ms120-connections-and-adjustments","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-connections-and-adjustments\/","title":{"rendered":"MS120: Connections and adjustments"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"432\" height=\"362\" src=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2025\/04\/MS120-Connections-and-adjustments-.jpg\" alt=\"\" class=\"wp-image-1514\" srcset=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2025\/04\/MS120-Connections-and-adjustments-.jpg 432w, https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2025\/04\/MS120-Connections-and-adjustments--300x251.jpg 300w, https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2025\/04\/MS120-Connections-and-adjustments--64x54.jpg 64w\" sizes=\"auto, (max-width: 432px) 100vw, 432px\" \/><\/figure>\n\n\n\n<p>The above picture shows all the connectors used for making external connections to the MS120, plus various adjustment points. These are:<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Bidirectional digital I\/O 0-3 and 4-7<\/h6>\n\n\n\n<p>There are two 6-pin connectors for 8 I\/O points which can each be used as an input or an output. Each 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\/ms120-product-documentation\/ms120-external-inputs-and-outputs\/ms120-bidirectional-points-used-as-inputs\/\">input mode<\/a>\u00a0and\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-external-inputs-and-outputs\/ms120-bidirectional-points-used-as-outputs\/\">output mode<\/a>.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Inputs 8 to 11<\/h6>\n\n\n\n<p>This is a single 6-pin connector for 4 input-only pins. These can be configured as a group to act as NPN or PNP inputs. The connector also has positive supply and common connections.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Power<\/h6>\n\n\n\n<p>This 5-pin connector is for applying power to the MS120. This is a special arrangement that allows for two separate power supplies so you can implement a variety of backup and\/or battery standby schemes. The wiring and power supply schemes are described under\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-power-supply\/\">MS120 Power supply<\/a>.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Pwr link<\/h6>\n\n\n\n<p>The 2-position jumper helps determine the power supply scheme. This is detailed under\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-power-supply\/\">MS120: 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 MS120. 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\">SPx<\/h6>\n\n\n\n<p>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. This connector is for expansion boards like the\u00a0<a href=\"https:\/\/www.splatco.com\/skb\/1834.htm\">XBIO16<\/a>.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\"><a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/glossary-of-terms\/#o366\">SPice<\/a><\/h6>\n\n\n\n<p>This connector is for low cost SPice add-on boards. It is virtually identical to the SPice connector on\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-expansion-boards\/xbio16-16-bidirectional-i-os\/\">MMi99<\/a>, MMi200 and SL99 controllers. TSP is not supported. Normally you would simply plug a compatible board onto this connector. Some information about the connector is provided under\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-spice-connectors\/\">MS120 SPice connectors<\/a>.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">SPice2<\/h6>\n\n\n\n<p>This is a second Spice connector, providing more SPice expansion pins in the MS120 than in previous models.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">NPN\/PNP link<\/h6>\n\n\n\n<p>This 2-position jumper determines whether inputs 8-11 operate in NPN or PNP mode. This is detailed under\u00a0<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-external-inputs-and-outputs\/ms120-dedicated-npn-pnp-inputs\/\">MS120: Dedicated NPN\/PNP inputs<\/a>.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Contrast<\/h6>\n\n\n\n<p>This is for adjusting the contrast on the optional liquid crystal display. It is factory preset and should normally not need adjusting.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The above picture shows all the connectors used for making external connections to the MS120, plus various adjustment points. These are: Bidirectional digital I\/O 0-3&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1503,"menu_order":1,"template":"","class_list":["post-1511","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>MS120: Connections and adjustments - 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=\"MS120: Connections and adjustments - SPLat Controls\" \/>\n<meta property=\"og:description\" content=\"The above picture shows all the connectors used for making external connections to the MS120, plus various adjustment points. 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