{"product_id":"dual-port-serial-i-o-module-621-9938-honeywell-siom","title":"Dual-Port Serial I\/O Module 621-9938 Honeywell SIOM","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eHoneywell 621-9938 is a dual-port Serial I\/O Module (SIOM) designed for redundant serial I\/O configurations. It controls the serial I\/O card file and interfaces with the 621-9939 Serial Link Module, supporting 8\/16\/32-point arrangements.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: Serial I\/O Module (SIOM) – dual port\u003c\/li\u003e\n\u003cli\u003ePorts: Dual communication ports for redundant links\u003c\/li\u003e\n\u003cli\u003ePoint capacity: 8 \/ 16 \/ 32 configurable\u003c\/li\u003e\n\u003cli\u003eInterface: To 621-9939 SLM\u003c\/li\u003e\n\u003cli\u003eTermination: 200–300 Ω resistors required at link ends\u003c\/li\u003e\n\u003cli\u003eAddressing: DIP-switch selectable\u003c\/li\u003e\n\u003cli\u003eSystem: IPC \/ ISSC serial I\/O racks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDual-port design for high-availability serial networks\u003c\/li\u003e\n\u003cli\u003eSupports both redundant and non-redundant use\u003c\/li\u003e\n\u003cli\u003eConfigurable I\/O density and fault response\u003c\/li\u003e\n\u003cli\u003eFront status LEDs for diagnostics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorts?\u003c\/strong\u003e Dual for redundant serial links.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint options?\u003c\/strong\u003e 8, 16 or 32.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePairs with?\u003c\/strong\u003e 621-9939 Serial Link Module.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInstall in slot N of the remote serial I\/O card file.\u003c\/li\u003e\n\u003cli\u003eSet DIP switches for address, point count and fault mode.\u003c\/li\u003e\n\u003cli\u003eConnect dual serial cables and install terminating resistors.\u003c\/li\u003e\n\u003cli\u003ePower up and verify communication with the SLM.\u003c\/li\u003e\n\u003cli\u003eConfirm I\/O mapping and status LEDs.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRequired for redundant serial I\/O card files.\u003c\/li\u003e\n\u003cli\u003eUse 621-9935 for non-redundant applications if dual ports are not needed.\u003c\/li\u003e\n\u003cli\u003eCritical spare for dual-redundant serial networks.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":52994022998327,"sku":"621-9938","price":219.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0798\/8343\/6343\/files\/621-9938_2_694cde7f-52f8-46f6-bc96-8f226c42b18a.jpg?v=1789547725","url":"https:\/\/www.controltech-supply.com\/products\/dual-port-serial-i-o-module-621-9938-honeywell-siom","provider":"ControlTech Supply Limited","version":"1.0","type":"link"}