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Product Type: Central Unit
System Integrity: Maintains volatile memory during power loss to prevent data corruption
Communication Ports: 1 serial port (RS-232)
Memory: 512 KB CMOS RAM
Long Description: TU508-ETH is an S500 series interface terminal unit designed for Ethernet protocols
Honeywell 621-3550 16-Point Digital Input Module BIO3 88-132VDC Product Type: Central UnitDescription: The 621 3550 module is designed to collect digital input signals from various devices, including sensors, switches, and field instruments. It is suitable for applications in machine control, process monitoring, and building automation. Specifications: Input Voltage: 24VDC Number of Points: 16 Input Type: Digital Isolation Voltage: 500V RMS Dimensions: 3. 3 cm x 27. 4 cm x 17. 1 cm (1. 3" x 10. 8" x 6. 8") Weight: 0. 8 kg (1 lb 8. 0 oz)