6ES7312-5BF04-0AB0 Siemens SIMATIC S7-300 CPU 312C
SIMATIC S7-300 컴팩트 CPU
통합 디지털 I/O: 10 DI / 6 DO
6ES7312-5BF04-0AB0 데이터시트
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SIMATIC S7-300 컴팩트 CPU
,통합 디지털 I/O: 10 DI / 6 DO
,6ES7312-5BF04-0AB0 데이터시트
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2-3 영업일
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01 / PRODUCT IDENTITY
A Compact Controller Architecture
The CPU 312C integrates essential control and signal-handling functions into a single S7-300 controller unit, reducing the need for separate components for the listed onboard functions.
Central ProcessingExecutes the configured user program and coordinates controller operations.
Onboard Signal HandlingSupports direct connection of field signals through integrated digital channels.
Technological FunctionsProvides integrated counting and pulse-related functions for supported tasks.
Identification:Siemens SIMATIC S7-300 · CPU 312C · Order number 6ES7312-5BF04-0AB0.
02 / SYSTEM ROLE & APPLICATION
Control Processing & Machine Operation
PLC Control ProcessingExecutes the user program and coordinates connected S7-300 automation functions.
Signal Acquisition & SwitchingHandles digital field signals through the controller's integrated I/O.
Counting ApplicationsSupports counting and frequency-related tasks using onboard technological functions.
Programming & Operator CommunicationConnects through the integrated MPI interface for supported communication tasks.
Application & Maintenance Context
This CPU serves as the controller in SIMATIC S7-300 systems. Maintenance teams may search for a replacement when the CPU fails to start, program execution stops, integrated I/O functions become unavailable, or MPI communication is interrupted. A controller fault can affect machine sequencing and connected equipment, extending production downtime while the control system is restored. Verify the complete order number, hardware configuration, memory card and program requirements before replacement.
03 / FUNCTIONAL OVERVIEW
Controller Function Structure
Functional overview of the integrated CPU architecture; not a wiring diagram.
04 / TECHNICAL SPECIFICATIONS
CPU 312C Technical Data
CORE HARDWARE & PERFORMANCE
64 KB
WORK MEMORY
24 V DC
SUPPLY VOLTAGE
187.5
MPI kbit/s MAX.
Hardware product version:01
Firmware version:V3.3
Dimensions (W × H × D):80 × 125 × 130 mm
Weight:Approx. 410 g
Power Supply & Electrical Characteristics
Permissible supply range19.2–28.8 V DC
Current consumption, rated570 mA
Current consumption, no-loadTypically 90 mA
Inrush currentTypically 5 A
I²t0.7 A²·s
Power lossTypically 8 W
Stored energy during voltage failure5 ms
Minimum repeat rate1 s
External supply protection recommendationType C min. 2 A / Type B min. 4 A
Digital Input Characteristics
Input characteristicIEC 61131, Type 1
Rated input voltage24 V DC
Signal 0 input voltage-3 to +5 V
Signal 1 input voltage+15 to +30 V
Input current at signal 1Typically 8 mA
Standard input delayTypically 3 ms
Configurable standard input delay0.1 / 0.3 / 3 / 15 ms
Technological input delay, 0 to 1Maximum 48 μs
Shielded cable length1,000 m max.
Unshielded cable length600 m max.
Technological function cable length100 m shielded max.; unshielded not allowed
Digital Output Characteristics
Short-circuit protectionYes, electronically clocked
Short-circuit response thresholdTypically 1 A
Rated output current at signal 1500 mA
Permissible output current5 mA to 0.6 A
Residual current at signal 0Maximum 0.5 mA
Output voltage at signal 1Minimum L+ (-0.8 V)
Inductive shutdown voltage limitationL+ (-48 V)
Maximum lamp load5 W
Load resistance range48 Ω to 4 kΩ
Resistive load switching frequency100 Hz max.
Inductive load switching frequency0.5 Hz max.
Lamp load switching frequency100 Hz max.
Pulse output frequency2.5 kHz max.
Total output current per group, horizontal installation2 A max. at 40 °C; 1.5 A max. at 60 °C
Total output current per group, vertical installation1.5 A max. at 40 °C
Output cable length1,000 m shielded / 600 m unshielded
Parallel switching for increased outputNo
Parallel switching for redundant load controlYes
The two high-speed outputs must not be connected in parallel.
Memory, Processing & Program Capacity
Expandable work memoryNo
Retentive data memory64 KB
Load memoryPlug-in MMC
Maximum MMC capacity8 MB
MMC data management retentionMinimum 10 years
Backup without batteryYes, via MMC
Typical bit operation time0.1 μs
Typical word operation time0.24 μs
Typical fixed-point operation time0.32 μs
Typical floating-point operation time1.1 μs
Total CPU blocks1,024
Maximum DB size64 KB
Maximum FB size64 KB
Maximum FC size64 KB
Maximum nesting depth per priority class16
Communication & Interface Details
Industrial Ethernet interfaces0
RS 485 interfaces1 / MPI
RS 422 interfaces0
Interface typeIntegrated RS 485
PG/OP communicationSupported
Global data communicationSupported
S7 basic communicationSupported
S7 communicationSupported
Maximum total connections6
Maximum GD loops8
Maximum GD packet size22 bytes
Maximum S7 basic user data per job76 bytes
Integrated Functions, Diagnostics & Isolation
Frequency measurementSupported
Frequency meters2, up to 10 kHz
Pulse outputs2
Pulse output PWM frequencyUp to 2.5 kHz
PID controllerNo
Diagnostic bufferYes, up to 500 entries
Entries retained through power failureLast 100
Green digital input status LEDYes
Green digital output status LEDYes
Input channel-to-channel isolationNo
Input-to-backplane isolationYes
Output channel-to-channel isolationNo
Output-to-backplane isolationYes
Permissible potential difference75 V DC / 60 V AC
Isolation test voltage600 V DC
Configuration, Programming & Environmental Data
Programming packageSTEP 7 V5.5 + SP1 or higher
Alternative programming packageSTEP 7 V5.3 + SP2 with HSP 203
STEP 7 LiteNot supported
LADSupported
FBDSupported
STLSupported
SCLSupported
GRAPHSupported
HiGraphSupported
Know-how protectionSupported
Operating ambient temperature0 to 60 °C
Maximum racks1
Maximum modules per rack8
Maximum expansion units0
05 / CONFIGURATION & INSTALLATION
Memory Card & Connection Requirements
Micro Memory CardThe CPU uses a plug-in MMC for load memory and program data storage.
Front ConnectorThe specified connection arrangement uses a 40-pole front connector.
Programming EnvironmentUse the documented STEP 7 versions and hardware support package requirements for configuration.
Important Installation & Commissioning Checks
Confirm the complete order number and CPU hardware version.
Check the DC supply and permitted input voltage range.
Confirm the required front connector and Micro Memory Card.
Review the existing program, memory card contents and STEP 7 configuration.
Verify MPI network settings and connected programming/operator devices.
Check connected I/O wiring and machine safety procedures before commissioning.
The CPU has no integrated Industrial Ethernet interface. The listed communication interface is MPI over RS 485.
06 / PRODUCT LIFECYCLE
Lifecycle Information
PM400 · PHASE-OUT ANNOUNCED
Siemens lists this product with a product phase-out announcement. The recorded phase-out effective date is 01 October 2023.
Sourcing note:Confirm the required condition, available documentation, memory card requirements and quotation terms before purchasing. Product lifecycle status does not confirm current stock availability.
07 / INDUSTRIAL SOURCING SUPPORT
AMIKON Industrial Supply
Part Identification Sourcing Support Quotation Service
Industrial Automation Sourcing, Made Straightforward.
YOUR SALES CONTACT
Miya Zheng
08 / ORDER SUPPORT
Delivery & Warranty
Testing & PackagingItems are checked before dispatch where applicable and packed for shipment.
DOA & ReturnsDOA and return requests are reviewed against order condition and agreed quotation terms.
Warranty12-month warranty, subject to quotation and applicable product terms.
RFQ details:Part Number · Quantity · Destination · Required Date · Machine/System Model
09 / PRODUCT FAQ
Frequently Asked Questions
01What are the integrated I/O points on this CPU?
The CPU 312C provides 10 digital inputs and 6 digital outputs as integrated channels.
02Does 6ES7312-5BF04-0AB0 support high-speed counting?
Yes. It has two integrated counters with a maximum counting frequency of 10 kHz.
03Which communication interface is built into this CPU?
It has one integrated RS 485 MPI interface, with a maximum MPI transmission rate of 187.5 kbit/s.
04What memory and accessories are required?
The CPU has 64 KB integrated work memory. A Micro Memory Card and a 1 × 40-pole front connector are specified as required items.
05What should be checked before replacing this CPU?
Check the exact order number, hardware configuration, program and MMC requirements, 24 V DC supply, front connector, MPI settings and connected I/O wiring. Also note the Siemens phase-out announcement effective 01 October 2023.
10 / PART NUMBER INDEX
Related Models
Additional industrial automation and electrical part numbers for sourcing reference.
Expand Related Model List
| Hydac VD 5 D.0/-L220 | 6ES5 521-8MA11 | WAGO 787-1675 | 7EX270.50-1 |
| MSF220V | 3RR2441-1AA40 | EX270 | Elmess eB-500-b 945/EL 139/86 |
| VRW8203131/24N4 | Siemens 6FX8002-2DC20-1AF5 | CM411 | Hydac VD5C.0/-Z-30C-CAN-SH-03054191 |
| MHA4-MS1H-3/2G-4-K-SA | MTTB1.5 1414129 | DO720 | Siemens 3RU2916-3AA01 |
| MBC51-20-20-A 13008171 | Steute BZ16-11D 90.57.0.005 | 7D0720.0 | 75-NZG/G 5/2 2941060 |
| IFM RT2432 KDBR12-MFRKG/US/ /V | Siemens 3VL9675-4TF31 | 7DO720.7 | GP406N-C JB031748.001AB |
| DeVILBISS AGMDPRO-1-1-K | 6ES5 440-8MA22 | X20CP3684 | 15-300M-10N 1009717000 |
| GTCA050X43A02 | C200HW-DRM21-V1 DRM21-V1 | 5DLSDL.1001-00 | AMP 420-F06B |
| Festo FR-8-1/2 | 3NP1923-1BF30 | 31F672.9 | MR7402.4842-U3-N60-G01-AK1-M0-P0-S0 |
| GHAB040L20D04 | PCA/702040/M/200 | IF672 | MR7402.5147-U3-N60-G01-AKK-M0-P0-S0 |
| HC-EL332-006 | UKH50-FE | IF781 | INTORQ BFK457-06 00416211 |
| ABB TU515 C3 1SAP212200R0001 | NF 085-503 | 3IF781.9 | CPE18-M1H-5LS-1/4 |
| 1SNA165111R1400 | MDERAXX056-12V1 | 31F781.9 | E83S C50 |
| ADB919V3AI | DFM-12-90-BPA-KF | OPS3100.1 | RK40 RK 40-24H |
| 0PS3100.1 | PS1200 | FPF-285-E-1-024 | W3-24DC/500AC-0.4I |
| PS1050 | OPS1200.1 | 431A-E0C-DM-DDAJ-1KJ | DVG-50-80-PPV |
| 0PS1200.1 | CDC-32-140-A-P-A-R | ABB NAIO-02 | 3RT1044-1AD00 |
| 6ES7450-1AP00-0AE0 | 7DI439.7 | Siemens 3RR2441-1AA40 | Siemens 6ES5 521-8MA11 |
Related part numbers are supplied as sourcing references only. Their inclusion does not establish compatibility or interchangeability with this CPU.
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