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General information
Product type designation CPU 1212C DC/DC/DC
Engineering with
● Programming package STEP 7 V11 SP2 or higher
Supply voltage
Rated value (DC)
● 24 V DC Yes
permissible range, lower limit (DC) 20.4 V
permissible range, upper limit (DC) 28.8 V
Load voltage L+
● Rated value (DC) 24 V
● permissible range, lower limit (DC) 20.4 V
● permissible range, upper limit (DC) 28.8 V
Input current
Current consumption, max. 1.2 A; 24 V DC
Inrush current, max. 12 A; at 28.8 V DC
Output current
for backplane bus (5 V DC), max. 1 000 mA; Max. 5 V DC for SM and CM
Encoder supply
24 V encoder supply
● 24 V Permissible range: 20.4V to 28.8V
Power loss
Power loss, typ. 9 W
Memory
Work memory
● integrated 50 kbyte
Load memory
● integrated 1 Mbyte
Backup
● present Yes; maintenance-free
● without battery Yes
CPU processing times
for bit operations, typ. 0.085 µs; / instruction
for word operations, typ. 1.7 µs; / instruction
for floating point arithmetic, typ. 2.5 µs; / instruction
CPU-blocks
Number of blocks (total) DBs, FCs, FBs, counters and timers. The maximum number of addressable
blocks ranges from 1 to 65535. There is no restriction, the entire working
memory can be used