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and 3 option slots
Memory: Memory Size: 642 kB
primarily for mechanical protection
It accepts input from proximity probes or magnetic pickups and converts these signals into digital Keyphasor signals
ABB TB521-ARCNET Terminal Base Comms Gateway I/O Module and 3 option slotsGeneral Information Extended Product Type: TB521 ARCNET Product ID: 1SAP112100R0260 ABB Type Designation: TB521 ARCNET EAN: 4016779711449 Catalog Description: Terminal base for AC500 V2 with 2 slots for communication modules, ARCNET interface, and 2 serial interfaces (RS232 RS485). Long Description: TB521 ARCNET is a terminal base for AC500 V2 with 2 slots for communication modules, ARCNET interface, and 2 serial interfaces (RS232 RS485). Ordering
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