{"product_id":"honeywell-621-9935-serial-i-o-module","title":"Honeywell 621-9935 Serial I\/O Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHoneywell 621-9935\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSerial I\/O Module provides robust serial communication for IPC 620 and 621 systems. It enables reliable data exchange between controllers, operator stations, engineering workstations, and third-party devices. Designed for industrial-grade applications, it supports redundancy and fault-tolerant operation when paired with Serial Link Selector Modules.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Protocols\u003c\/td\u003e\n\u003ctd\u003eRS-232, RS-422\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Channels\u003c\/td\u003e\n\u003ctd\u003e2–4 serial ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate\u003c\/td\u003e\n\u003ctd\u003e300 bps – 115.2 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eOptical isolation on all channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eError Detection\u003c\/td\u003e\n\u003ctd\u003eParity check, CRC verification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Indicators\u003c\/td\u003e\n\u003ctd\u003eLEDs for link activity, communication status, and faults\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e5 VDC from backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e130 × 35 × 110 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.39 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e–40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eRack-mounted modular slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eProvides RS-232 and RS-422 serial communication for controllers and external devices.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports redundancy when paired with Serial Link Selector Modules (e.g., 621-9928R).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLED diagnostics for real-time monitoring of communication and fault status.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRugged construction with optical isolation for EMI resistance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFlexible configuration across multiple baud rates and protocols.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e621-9935\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis widely used in oil \u0026amp; gas, chemical, and power generation industries. It ensures reliable communication between control modules and external systems in distributed control environments, supporting continuous operation under harsh conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this module support multiple serial protocols simultaneously?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it supports RS-232 and RS-422 on separate channels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the module compatible with redundancy systems?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it can be paired with Serial Link Selector Modules for fault-tolerant operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What operating environments are suitable?\u003c\/strong\u003e\u003cbr\u003eA: It is designed for industrial environments with operating temperatures from 0°C to 60°C and storage temperatures down to –40°C.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does it integrate with operator stations and engineering workstations?\u003c\/strong\u003e\u003cbr\u003eA: It provides dedicated serial communication links for seamless data exchange without additional converters.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":43881884942424,"sku":"621-9935","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/621-99381.jpg?v=1773740276","url":"https:\/\/www.industriaxplc.com\/products\/honeywell-621-9935-serial-i-o-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}