{"product_id":"honeywell-621-9939-serial-link-module-slm-remote-i-o","title":"Honeywell | 621-9939 | Serial Link Module SLM Remote I\/O","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Honeywell 621-9939 is a Serial Link Module (SLM) that manages serial I\/O data transfer to and from remote I\/O. It contains its own processor and data table, operating asynchronously to the main processor, and supports up to two serial channels.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: Serial Link Module (SLM)\u003c\/li\u003e\n\u003cli\u003eChannels: 2 serial I\/O channels per module\u003c\/li\u003e\n\u003cli\u003eFunction: Controls data transfer between processor and remote serial I\/O\u003c\/li\u003e\n\u003cli\u003eOperation: Asynchronous to main processor\u003c\/li\u003e\n\u003cli\u003eTermination: Requires terminating resistors at channel ends\u003c\/li\u003e\n\u003cli\u003eSystem: Honeywell IPC \/ 620-9000 series\u003c\/li\u003e\n\u003cli\u003eTypical current: Approx. 2 A at 5 V DC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndependent processor for serial communication\u003c\/li\u003e\n\u003cli\u003eSupports dual serial channels\u003c\/li\u003e\n\u003cli\u003eEnables distributed remote I\/O architectures\u003c\/li\u003e\n\u003cli\u003eCRC and timeout error checking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannels?\u003c\/strong\u003e Two serial I\/O channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction?\u003c\/strong\u003e Serial link to remote I\/O.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem?\u003c\/strong\u003e Honeywell IPC 620\/9000 family.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInstall the SLM in the designated processor chassis slot (L or M).\u003c\/li\u003e\n\u003cli\u003eConnect serial cables and install terminating resistors at both ends of each channel.\u003c\/li\u003e\n\u003cli\u003eConfigure channel parameters and addresses.\u003c\/li\u003e\n\u003cli\u003ePower up and verify communication status.\u003c\/li\u003e\n\u003cli\u003eTest data transfer with remote I\/O drops.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRequired for systems using serial remote I\/O.\u003c\/li\u003e\n\u003cli\u003eConfirm cable type and termination values.\u003c\/li\u003e\n\u003cli\u003eCritical spare for distributed IPC architectures.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":53004401082679,"sku":"621-9939","price":223.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0798\/8343\/6343\/files\/621-9939_69cfddf7-4978-41c0-bb02-be1ace894432.jpg?v=1789717202","url":"https:\/\/www.controltech-supply.com\/products\/honeywell-621-9939-serial-link-module-slm-remote-i-o","provider":"ControlTech Supply Limited","version":"1.0","type":"link"}