Pepper-computer Modular Computers RS485 Uživatelský manuál stáhnout pdf (Strana 43)

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SMART I/O User’s Manual

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.

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