| SIMATIC S7-300, CPU 312 IFM FOR EXPANDED TEMPERATURE RANGE CENTRAL PROCESSING UNIT WITH 10 DI/6 DO, 1 X 20 PIN., COUNTER, FREQUENCY MEASUREMENT INTEGRATED POWER SUPPLY 24 V DC 6 KBYTES WORKING MEMORY |
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Supply voltage |
Rated voltage/DC | 24 V |
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 |
Rated value at 24 V DC | 800 mA; 0.8 A + 0.5 A per fully loaded output |
Inrush current, max. | 8 A |
Power losses |
Power loss, typ. | 9 W; incl. integrated inputs/outputs |
Memory |
Work memory |
integrated | 6 kbyte; 2 K instructions RAM (integrated); 1 instruction means 3 bytes on average |
Load memory |
integrated FEPROM, max. | 20 kbyte |
integrated RAM, max. | 20 kbyte |
Backup |
without battery | Yes; 72 bytes: memory bits, times, counters, data |
CPU processing times |
for bit operations, min. | 0.6 µs |
for bit operations, max. | 1.2 µs |
for word operations, min. | 2 µs |
for fixed point arithmetic, min. | 3 µs |
for floating point arithmetic, min. | 60 µs |
for timer/counter operations, min. | 15 µs |
CPU-blocks |
DB |
Number, max. | 63 |
Size, max. | 6 kbyte |
FB |
Number, max. | 32 |
Size, max. | 6 kbyte |
FC |
Number, max. | 32 |
Size, max. | 6 kbyte |
OB |
Description | see instruction list |
Size, max. | 6 kbyte |
Nesting depth |
per priority class | 8 |
Counters, timers and their retentivity |
S7 counter |
Number | 32 |
of which retentive without battery |
adjustable | Yes |
lower limit | 0 |
upper limit | 31 |
Counting range |
lower limit | 1 |
upper limit | 999 |
S7 times |
Number | 64 |
Time range |
lower limit | 10 ms |
upper limit | 9990 s |
Data areas and their retentivity |
Flag |
Number, max. | 128 byte |
Retentivity available | Yes; MB 0 to MB 127 |
of which retentive without battery | 0 to 576 (M 0.0 to M 71.7, adjustable) |
Retentivity preset | MB 0 to MB 15 |
Address area |
Process image |
Inputs | 32 byte |
Outputs | 32 byte |
Digital channels |
Inputs | 256 |
Outputs | 256 |
Analog channels |
Inputs | 64 |
Outputs | 32 |
Addressing volume |
Outputs | 64 byte |
Inputs | 64 byte |
Address space per module |
Address space per module, max. | 128 byte; 128 bytes/128 bytes |
Hardware configuration |
Racks, max. | 1 |
Modules per rack, max. | 8 |
Expansion devices, max. | 0 |
Connectable programming devices/PCs | PGs/PCs with STEP 7 connectable via MPI interface |
Number of modules per DP slave interface, max. | 8 |
Number of DP masters |
via CP | 1; CP 342-5 |
Time of day |
Clock |
Software clock | Yes |
Digital inputs |
Number/binary inputs | 10; of which 4 channels can be used for process alarms or integrated functions |
Input voltage |
Rated value, DC | 24 V |
for signal "0" | -3 to +5 V |
for signal "1" | 15 to 30 V |
Input current |
for signal "1", typ. | 7 mA; Min. 2 mA |
Input delay (for rated value of input voltage) |
for standard inputs |
at "0" to "1", max. | 5 ms; typically 3 ms |
for interrupt inputs |
at "0" to "1", max. | 50 µs |
for counter/technological functions |
at "0" to "1", max. | 50 µs |
Cable length |
Cable length, shielded, max. | 1000 m; 100 m for alarm and counter inputs |
Cable length unshielded, max. | 600 m |
Digital outputs |
Number/binary outputs | 6 |
Functionality/short-circuit strength | Yes; Clocked electronically |
Limitation of inductive shutdown voltage to | 30 V |
Output voltage |
for signal "1", min. | L+ (-0.8 V) |
Output current |
for signal "1" permissible range for 0 to 40 °C, max. | 500 mA |
for signal "1" permissible range for 40 to 60 °C, max. | 500 mA |
for signal "1" minimum load current | 5 mA |
for signal "0" residual current, max. | 0.5 mA |
Switching frequency |
with resistive load, max. | 100 Hz |
with inductive load, max. | 0.5 Hz |
Aggregate current of outputs (per group) |
all mounting positions |
up to 40 °C, max. | Назад в раздел
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