CPU551

Required space / width

1 slot

Weight

0.6 kg

Display

5x7 LED

Local service interface

Serial RS232 interface

Sampling intervals

from 100 µs

SDRAM

128 MB

Synchronous cache

8 MB

Clock frequency

500 MHz

CPU

64 Bit RISC CPU with floating point unit

SRAM

512 KB, battery buffered

Power supply

Voltage / Power supply (at 250°C)

+3.3 V, 2.0 A typical
+5 V, 1.5 A typical
+12 V, 0.04 A typical
–12 V, 0.04 A typical

Buffer battery

3.0 V, 3 µA typical

Power loss, typical

15 W

Digital inputs

Number

8 inputs, 4 with alarm capability

Galvanic isolation

Only through optional interface modules

Input voltage

• Rated voltage

24 V

• For 0-signal

-1 V ... +6 V

• For 1-signal

+13.5 V ... +33 V

Input power

• At 0-signal

0 mA

• At 1-signal

3 mA

Delay time

100 µs

Real-time clock, resolution

0.1 ms