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Honeywell 621-6575R redundant digital output module for Honeywell TDC 3000 distributed control systems. 32-point digital output; dual-channel redundancy for fault-tolerant operation.
Recognized manufacturer reference available for industrial supply enquiry.
Honeywell 621-9928R module for switching between multiple serial communication channels (RS-232/RS-485), connecting PLCs, HMIs and sensors to a central control system. 24 VDC; up to 256 kbps; 2000 VDC isolation.
Honeywell 621-9930 parallel I/O module (PIOM) for Honeywell 620/621 control systems, linking the processor rack with I/O racks. Manages address decoding and card-select signals between the CPM and installed I/O modules.