The PM-503 PROM Module is a firmware memory cartridge for Symbol's LL-500 OmniLink Interface Controller, used in LL-500-1200 configurations. It houses the PROM firmware that runs the LL-500 interface, controlling how barcode data is decoded and transmitted from Symbol scanners to the host. In LL-500 OmniLink Decoder Wedge configurations, the PM-503 is integrated as the memory module that provides the interface's firmware. Power supply is not included; a compatible adapter is typically required to power the device.
