{"id":1697,"date":"2025-04-11T12:31:24","date_gmt":"2025-04-11T12:31:24","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&p=1697"},"modified":"2025-06-10T08:00:54","modified_gmt":"2025-06-10T08:00:54","slug":"xiro16-safety-considerations","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-expansion-boards\/xiro16-8-inputs-and-8-relay-outputs-5a\/xiro16-safety-considerations\/","title":{"rendered":"XIRO16: Safety considerations"},"content":{"rendered":"\n
By proceeding to use the XIRO16 board you are indemnifying SPLat Controls, its agents and resellers against any claims that may arise due to death or injury arising from the use of the XIRO16. If you are not prepared to provide such an indemnity please return the XIRO16 to the supplier for a refund of the purchase price.<\/th><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Voltage isolation<\/h6>\n\n\n\n

The primary safety consideration with any control element that is switching voltages greater than the Extra Low Voltage (ELV) limit is how well those voltages (for example 120VAC or 240VAC) are insulated from a human user. In terms of a board like the XIRO16 this reduces to a consideration of:<\/p>\n\n\n\n

a) The breakdown (isolation) voltage ratings of the output relays.<\/p>\n\n\n\n

b) The physical spacing on the printed circuit board between “hot” conductors and “safe” conductors. This is commonly referred to as creepage distance, i.e. the distance across the normally insulating board that a current would have to “creep” in order to produce a shock hazard.<\/p>\n\n\n\n

The relays are rated for 4kV between coil (“safe”) and contacts (“hot”). Printed circuit creepage distance is 6mm between relay contacts and electronics. Creepage distance between relay output connectors is small, consequently all contacts on a particular connector must be on the same phase and an open contact must not be regarded as a safety barrier.<\/p>\n\n\n\n

If you use metal mounting screws we suggest you use insulating tubular spacers (standoffs). It is advisable to use nuts and\/or screw heads that do not extend past the metal pattern surrounding each mounting hole. Alternatively use insulating washers under the nuts or screw heads. We strongly urge you to use all 7 mounting holes to ensure firm mounting and to support the board while connections are made and unmade. The DK version of the board is supplied with snap-in nylon standoffs.<\/p>\n\n\n\n

When mounting the board you must take into account the proximity of the exposed printed circuit conductors to the mounting surface (probably a metal surface).<\/p>\n\n\n\n

Wiring (insulation) considerations<\/h6>\n\n\n\n

In many applications the input wring and the wiring to the relays will be at a dangerous voltage. At the same time it will necessarily have single layer insulation. Safety regulations in most jurisdictions, and plain engineering common sense, dictate that you should physically separate such wiring from the ELV wiring.<\/p>\n\n\n\n

High currents and fusing<\/h6>\n\n\n\n

You must make sure that the connecting wire you use is appropriately rated for the load current. You must also make sure the crimp connectors you use are selected to match the wire gauge, that they are rated for the current and that they are correctly crimped. Failure to observe the precautions could result in an overheated contact leading to a dangerous situation.<\/p>\n\n\n\n

To prevent fault currents from overheating wires and melting the insulation it is mandatory in most jurisdictions that circuits carrying high currents be suitably fused to fault trip at a current less than or equal to the rating of the wires.<\/p>\n","protected":false},"excerpt":{"rendered":"

By proceeding to use the XIRO16 board you are indemnifying SPLat Controls, its agents and resellers against any claims that may arise due to death…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1693,"menu_order":2,"template":"","class_list":["post-1697","spl_knowledgebase","type-spl_knowledgebase","status-publish","hentry"],"acf":[],"yoast_head":"\nXIRO16: Safety considerations - 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=\"XIRO16: Safety considerations - SPLat Controls\" \/>\n<meta property=\"og:description\" content=\"By proceeding to use the XIRO16 board you are indemnifying SPLat Controls, its agents and resellers against any claims that may arise due to death...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-expansion-boards\/xiro16-8-inputs-and-8-relay-outputs-5a\/xiro16-safety-considerations\/\" \/>\n<meta property=\"og:site_name\" content=\"SPLat Controls\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-10T08:00:54+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-expansion-boards\/xiro16-8-inputs-and-8-relay-outputs-5a\/xiro16-safety-considerations\/\",\"url\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-expansion-boards\/xiro16-8-inputs-and-8-relay-outputs-5a\/xiro16-safety-considerations\/\",\"name\":\"XIRO16: Safety considerations - 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