Pepper Computer Modular Computers RS485 - Manual (Page 43)

SMART I/O User’s Manual
©1996 PEP Modular Computers GmbH March 12, 1996 Page 2 - 3
2
Chapter 2 SMART-BASE
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.