Pepper-computer Modular Computers RS485 Bedienungsanleitung PDF herunterladen (Seite 81)

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101

SMART I/O User’s Manual

Chapter 3 SMART-EXT

3. SMART-EXT

The SMART-EXT is a carrier unit enabling the connection of a further 2

SMART-Modules thereby enhancing the I/O capacity of the SMART I/O

system. Up to 4 of these extensions may be cascaded via a 10-wire flat-band

cable with integrated 3-wire SPI (Serial Peripheral Interface). To achieve a

common interface between modules, a SMART I/O ‘C’ library is provided by

PEP.

3.1 Specifications

Controller

- Frequency

- Firmware

MC68HC705C8A

4 MHz

PEP Firmware for OTP device

Interface Speed Set to 1 MHz

Power Consumption Typ. 25 mW

Temperature Range

- Storage

- Standard

- Extended

-20°C to + 125°C

0°C to +70°C

-40°C to +85°C

Operating Humidity 0 to 95% non-condensing

Weight

260g (without modules, blank

panels or screw terminals

The SPI follows a Motorola defined communication protocol which is

beyond the scope of this manual to describe. More information may be found

by referring to the relevant data-sheets.

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