Chapter 2 SMART-BASE | SMART I/O User’s Manual |
2. SMART-BASE
The SMART-BASE is the main unit to which up to three SMART-Modules may be connected to fulfil a given I/O task with I/O enhancement being provided through the connection of a SMART-EXT unit which itself may accommodate up to 2 SMART-Modules. A counter/timer is also a standard feature providing direct access to IRQ4 of the I/O controller. The driving force behind the SMART-BASE is the MC68302 microprocessor from Motorola operating at 20MHz.
The SMART-BASE, complete with built-in RS232 and RS485 (PROFIBUS) interfaces is connected to the outside world by RJ45 and 9-pin D-Sub connectors respectively. Connected SMART-Modules use industrial stand- ard, plug-in screw terminals.
Program code is stored in EPROM or FLASH memory thereby doing away with disk accesses and ensuring data security in harsh industrial environ- ments. A SMART-BASE unit with additional 1MByte FLASH memory may be ordered as an option in which to extend the standard code and supply user-specific functionality.
