Square D 8030 CRM-210 Sy max Local Interface Module

The 8030-CRM-210 Local Interface Module from Square D (SY/MAX Class 8030) is a removable LI unit that sits in the SY/MAX rack with the processor to locate and manage remote digital and register I/O across a multi-drop network. It provides 512 registers—255 for external I/O addresses and 257 for internal data storage—supporting SY/MAX processors in Model 300, 400, 500, or 700 series and enabling serial communication to remote I/O racks. The CRM-210 is compatible with CRK-210/300, DRK-210/300, and GRK-110/210 racks, and installation typically uses a keying pin located between registers 92 and 94 to ensure correct orientation within the rack. UL-listed and drawing about 1.6 A from the SY/MAX power supply, this module serves as the dedicated local interface in Square D’s Sy/Max ecosystem for linking a central processor to distributed I/O.