SMART I/O User’s Manual
March 12, 1996
©1996 PEP Modular Computers GmbH
Page 2 - 4
Chapter 2 SMART-BASE
2.1 Specifications
DC/DC
Nominal Input Voltage 24V DC
Input Voltage Range 18V - 36V DC
Input Current
140mA typ. @ 24V (static)
400mA typ. @ 24V (full load)
Main Output Voltage 5V DC / 1.2A ± 2.5%
Auxiliary Output Voltage 5V DC / 150mA (PROFIBUS/RS485) ± 5%
Switching Frequency 100kHz
Main Output Ripple ± 10mV typ.
Max. Efficiency 68% typ. (between 74% and 100% load)
Galvanic Isolation 500V DC max. to/from supply source
Controlling Unit
CPU MC68302 @ 20MHz
EPROM or FLASH*
1 MByte or 256 kByte on Jedec 32-pin
sockets (16-bit access)
FLASH*
1 MByte or 256 kByte additionally soldered
on rear side of the board (16-bit access)
DRAM 512 kByte, byte/word access (16-bit)
SRAM 64 kByte, byte/word access (16-bit)
EEPROM 93C46, 32-byte system data
Galvanic Isolation 2.5kV DC to/from process I/O
Common
Temperature Range
- Storage
- Operating
- Extended
-40°C to + 85°C (without battery)
0°C to +70°C
-40°C to +85°C
Operating Humidity 0 to 95% non-condensing
Weight 640g typ. without SMART-Modules, blank
panels or screw terminals
* Option
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