Honeywell 621-9928R Serial Link Selector for Industrial Automation
Description
TheHoneywell 621-9928R Serial Link Selector Moduleis designed for industrial automation systems usingredundant Logic Managers. It enablesautomatic or manual switchingbetween multiple serial communication channels, ensuringfault-tolerant connectivityacrossPLCs,HMIs, andsensors. SupportingRS-232,RS-422, andRS-485protocols, this module enhancesflexibilityandreliabilityindistributed control environments.