ABB IMSPM01 Serial Port Module – INFI 90 Product Overview The ABB Bailey IMSPM01 is a Serial Port Module (SPM) for the INFI 90 Process Control System. It provides a computer interface to modules installed in an INFI 90 Process Control Unit (PCU). The module supports computer-based configuration, tuning, status monitoring and data transfer. Technical Specifications Module Type Serial Port Module (SPM) Processor 8-bit microprocessor Processor Clock 2 MHz UVROM 24 Kbytes SRAM 4