Taizhou Xinkong Automation Technology Co., Ltd

SIMATIC S7-300, CPU 312C COMPACT CPU WITH MPI, 10 DI/6 DO, 2 FAST COUNTERS (10 KHZ), INTEGRATED 24V DC POWER SUPPLY, 16 KBYTE WORKING MEMORY, MICRO MEMORY CARD REQUIRED

Supply voltage

Rated value (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

Current consumption (rated value)

500 mA

Inrush current, typ.

11 A

Power loss

Power loss, typ.

6 W; incl. integrated inputs/outputs

Memory

Work memory

● integrated

16 kbyte; For program and data

● expandable

No

Load memory

● expandable FEPROM

Yes; with Micro Memory Card (MMC)

● expandable FEPROM, max.

4 Mbyte

Backup

● present

Yes; Guaranteed by MMC (maintenance-free)

● without battery

Yes; Program and data

CPU processing times

for bit operations, typ.

0.2 µs

for bit operations, max.

0.4 µs

for word operations, typ.

1 µs

for fixed point arithmetic, typ.

2 µs

for floating point arithmetic, typ.

30 µs

CPU-blocks

DB

● Number, max.

63; DB 0 reserved

FB

● Number, max.

64

FC

● Number, max.

64

OB

● Size, max.

16 kbyte

● Number of time alarm OBs

1

● Number of delay alarm OBs

1

● Number of cyclic interrupt OBs

1

● Number of process alarm OBs

1

Nesting depth

● per priority class

8

● additional within an error OB

4

Counters, timers and their retentivity

S7 counter

● Number

128

Retentivity

— adjustable

Yes

— lower limit

0

— upper limit

128

Counting range

— lower limit

1

— upper limit

999

IEC counter

● present

Yes

● Type

SFB

S7 times

● Number

128

Retentivity

— adjustable

Yes

— lower limit

0

— upper limit

128

Time range

— lower limit

10 ms

— upper limit

9 990 s

IEC timer

● present

Yes

● Type

SFB

Data areas and their retentivity

Flag

● Number, max.

128 byte

● Retentivity preset

MB 0 to MB 15

Address area

I/O address area

● Inputs

1 kbyte

● Outputs

1 kbyte

Process image

● Inputs

128 byte

● Outputs

128 byte

Digital channels

● Inputs

256

● Outputs

256

Analog channels

● Inputs

64

● Outputs

32

Hardware configuration

Number of expansion units, max.

0

Number of DP masters

● via CP

1

Number of operable FMs and CPs (recommended)

● FM

4

● CP, PtP

2

● CP, LAN

1

Rack

● Racks, max.

1

● Modules per rack, max.

8

Time of day

Clock

● Software clock

Yes

● retentive and synchronizable

No

Operating hours counter

● Number

1

Clock synchronization

● supported

Yes

Digital inputs

Number of digital inputs

10

Input voltage

● Rated value (DC)

24 V

● for signal "0"

-3 to +5V

● for signal "1"

+15 to +30 V

Input current

● for signal "1", typ.

8 mA

Input delay (for rated value of input voltage)

for standard inputs

— parameterizable

Yes

— at "0" to "1", max.

100 µs; 0.1 / 0.3 / 3 / 15 ms

For technological functions

— at "0" to "1", max.

50 µs

Cable length

● shielded, max.

1 000 m; 100 m for technological functions

● unshielded, max.

600 m

Digital outputs

Number of digital outputs

6

Short-circuit protection

Yes; Clocked electronically

Limitation of inductive shutdown voltage to

L+ (-48 V)

Output voltage

● for signal "1", min.

L+ (-0.8 V)

Output current

● for signal "1" permissible range for 0 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

Total current of the outputs (per group)

all mounting positions

— up to 40 °C, max.

3 000 mA

— up to 60 °C, max.

1 500 mA

Cable length

● shielded, max.

1 000 m

● unshielded, max.

600 m

Encoder

Connectable encoders

● 2-wire sensor

Yes

— permissible quiescent current (2-wire sensor), max.

1.5 mA

Interfaces

MPI

● Cable length, max.

50 m; without repeater

1. Interface

Protocols

● MPI

Yes

● PROFIBUS DP master

No

● PROFIBUS DP slave

No

● Point-to-point connection

No

MPI

● Number of connections

6

● Transmission rate, max.

187.5 kbit/s

Services

— PG/OP communication

Yes

— Global data communication

Yes

— S7 basic communication

Yes

— S7 communication

Yes

— S7 communication, as client

No

— S7 communication, as server

Yes

Communication functions

PG/OP communication

Yes

Global data communication

● supported

Yes

● Number of GD packets, transmitter, max.

4

● Number of GD packets, receiver, max.

4

● Size of GD packets, max.

22 byte

S7 basic communication

● supported

Yes

● User data per job, max.

76 byte

S7 communication

● supported

Yes

● as server

Yes

● as client

No

● User data per job, max.

64 kbyte

Number of connections

● overall

6

● usable for PG communication

— reserved for PG communication

1

— adjustable for PG communication, max.

5

● usable for OP communication

— reserved for OP communication

1

— adjustable for OP communication, max.

5

● usable for S7 basic communication

— reserved for S7 basic communication

2

— adjustable for S7 basic communication, max.

2

S7 message functions

Number of login stations for message functions, max.

3

Integrated Functions

Number of counters

2

Counting frequency (counter) max.

10 kHz

Frequency measurement

Yes

Number of pulse outputs

2

Limit frequency (pulse)

2.5 kHz

Potential separation

Potential separation digital inputs

● Potential separation digital inputs

Yes

● between the channels, in groups of

10

● between the channels and backplane bus

Yes

Potential separation digital outputs

● Potential separation digital outputs

Yes

● between the channels, in groups of

6

● between the channels and backplane bus

Yes

Configuration

Configuration software

● STEP 7

Yes; V5.1 SP2

Programming

● Nesting levels

8

Programming language

— LAD

Yes

— FBD

Yes

— STL

Yes

— SCL

Yes

— GRAPH

Yes

— HiGraph®

Yes

Know-how protection

● User program protection/password protection

Yes

Dimensions

Width

80 mm

Height

125 mm

Depth

130 mm

Weights

Weight, approx.

410 g

last modified:

04/07/2020