Data sheet 6ES7314-6BH04-0AB0

SIMATIC S7-300, CPU 314C-2 PTP Compact CPU with MPI, 24 DI/16 DO, 4 AI, 2
AO, 1 Pt100, 4 high-speed counters (60 kHz), integrated interface RS485, Integr.
power supply 24 V DC, work memory 192 KB, Front connector (2x 40-pole) and
Micro Memory Card required

General information
Product type designation CPU 314C-2 PtP
HW functional status 01
Firmware version V3.3
Engineering with
● Programming package STEP 7 as of V5.5 + SP1 or STEP 7 V5.3 + SP2 or higher with HSP 204
Supply voltage
Rated value (DC) 24 V
permissible range, lower limit (DC) 19.2 V
permissible range, upper limit (DC) 28.8 V
external protection for power supply lines (recommendation) Miniature circuit breaker, type C; min. 2 A; miniature circuit breaker type B, min.
4A
Mains buffering
● Mains/voltage failure stored energy time 5 ms
● Repeat rate, min. 1s
Load voltage L+
Digital inputs
— load voltage / at digital input / at DC / rated value 24 V
— Reverse polarity protection Yes
Digital outputs
— Rated value (DC) 24 V
— Reverse polarity protection No
Input current
Current consumption (rated value) 660 mA
Current consumption (in no-load operation), typ. 150 mA
Inrush current, typ. 5A
I²t 0.7 A²·s
Digital inputs
● from load voltage L+ (without load), max. 80 mA
Digital outputs
● from load voltage L+, max. 50 mA
Power loss
Power loss, typ. 13 W
Memory
Work memory
● integrated 192 kbyte
● expandable No
Load memory
● Plug-in (MMC) Yes
● Plug-in (MMC), max. 8 Mbyte

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 ● Data management on MMC (after last programming), 10 a
min.
Backup
● present Yes; Guaranteed by MMC (maintenance-free)
● without battery Yes; Program and data
CPU processing times
for bit operations, typ. 0.06 µs
for word operations, typ. 0.12 µs
for fixed point arithmetic, typ. 0.16 µs
for floating point arithmetic, typ. 0.59 µs
CPU-blocks
Number of blocks (total) 1 024; (DBs, FCs, FBs); the maximum number of loadable blocks can be
reduced by the MMC used.
DB
● Number, max. 1 024; Number range: 1 to 16000
● Size, max. 64 kbyte
FB
● Number, max. 1 024; Number range: 0 to 7999
● Size, max. 64 kbyte
FC
● Number, max. 1 024; Number range: 0 to 7999
● Size, max. 64 kbyte
OB
● Number, max. see instruction list
● Size, max. 64 kbyte
● Number of free cycle OBs 1; OB 1
● Number of time alarm OBs 1; OB 10
● Number of delay alarm OBs 2; OB 20, 21
● Number of cyclic interrupt OBs 4; OB 32, 33, 34, 35
● Number of process alarm OBs 1; OB 40
● Number of startup OBs 1; OB 100
● Number of asynchronous error OBs 4; OB 80, 82, 85, 87
● Number of synchronous error OBs 2; OB 121, 122
Nesting depth
● per priority class 16
● additional within an error OB 4
Counters, timers and their retentivity
S7 counter
● Number 256
Retentivity
— adjustable Yes
— preset Z 0 to Z 7
Counting range
— lower limit 0
— upper limit 999
IEC counter
● present Yes
● Type SFB
● Number Unlimited (limited only by RAM capacity)
S7 times
● Number 256
Retentivity
— adjustable Yes
— preset No retentivity
Time range
— lower limit 10 ms
— upper limit 9 990 s
IEC timer
● present Yes
● Type SFB
● Number Unlimited (limited only by RAM capacity)

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Data areas and their retentivity
Retentive data area (incl. timers, counters, flags), max. 64 kbyte
Flag
● Size, max. 256 byte
● Retentivity available Yes; MB 0 to MB 255
● Retentivity preset MB 0 to MB 15
● Number of clock memories 8; 1 memory byte
Data blocks
● Retentivity adjustable Yes; via non-retain property on DB
● Retentivity preset Yes
Local data
● per priority class, max. 32 kbyte; Max. 2048 bytes per block
Address area
I/O address area
● Inputs 1 024 byte
● Outputs 1 024 byte
of which distributed
— Inputs none
— Outputs none
Process image
● Inputs 1 024 byte
● Outputs 1 024 byte
● Inputs, adjustable 1 024 byte
● Outputs, adjustable 1 024 byte
● Inputs, default 128 byte
● Outputs, default 128 byte
Default addresses of the integrated channels
— Digital inputs 124.0 to 126.7
— Digital outputs 124.0 to 125.7
— Analog inputs 752 to 761
— Analog outputs 752 to 755
Digital channels
● Inputs 1 016
— of which central 1 016
● Outputs 1 008
— of which central 1 008
Analog channels
● Inputs 253
— of which central 253
● Outputs 250
— of which central 250
Hardware configuration
Number of expansion units, max. 3
Number of DP masters
● integrated none
● via CP 4
Number of operable FMs and CPs (recommended)
● FM 8
● CP, PtP 8
● CP, LAN 10
Rack
● Racks, max. 4
● Modules per rack, max. 8; In rack 3 max. 7
Time of day
Clock
● Hardware clock (real-time) Yes
● retentive and synchronizable Yes
● Backup time 6 wk; At 40 °C ambient temperature
● Deviation per day, max. 10 s; Typ.: 2 s
● Behavior of the clock following POWER-ON Clock continues running after POWER OFF

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 ● Behavior of the clock following expiry of backup period the clock continues at the time of day it had when power was switched off
Operating hours counter
● Number 1
● Number/Number range 0
● Range of values 0 to 2^31 hours (when using SFC 101)
● Granularity 1h
● retentive Yes; Must be restarted at each restart
Clock synchronization
● supported Yes
● to MPI, master Yes
● on MPI, device Yes
● in AS, master Yes
● in AS, device No
Digital inputs
Number of digital inputs 24
● of which inputs usable for technological functions 16
integrated channels (DI) 24
Input characteristic curve in accordance with IEC 61131, type 1 Yes
Number of simultaneously controllable inputs
horizontal installation
— up to 40 °C, max. 24
— up to 60 °C, max. 12
vertical installation
— up to 40 °C, max. 12
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; 0.1 / 0.3 / 3 / 15 ms (You can reconfigure the input delay of the standard
inputs during program runtime. Please note that under certain circumstances
your newly set filter time may not be effective until the next filter cycle.)
— Rated value 3 ms
for technological functions
— at "0" to "1", max. 8 µs; Minimum pulse width/minimum pause between pulses at maximum
counting frequency
Cable length
● shielded, max. 1 000 m; 50 m for technological functions
● unshielded, max. 600 m; for technological functions: No
for technological functions
— shielded, max. 50 m; at maximum count frequency
— unshielded, max. not allowed
Digital outputs
Number of digital outputs 16
● of which high-speed outputs 4; Notice: You cannot connect the fast outputs of your CPU in parallel
integrated channels (DO) 16
Short-circuit protection Yes; Clocked electronically
● Response threshold, typ. 1A
Limitation of inductive shutdown voltage to L+ (-48 V)
Controlling a digital input Yes
Switching capacity of the outputs
● on lamp load, max. 5W
Load resistance range
● lower limit 48 Ω
● upper limit 4 kΩ
Output voltage
● for signal "1", min. L+ (-0.8 V)
Output current

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 ● for signal "1" rated value 500 mA
● for signal "1" permissible range, min. 5 mA
● for signal "1" permissible range, max. 0.6 A
● for signal "1" minimum load current 5 mA
● for signal "0" residual current, max. 0.5 mA
Parallel switching of two outputs
● for uprating No
● for redundant control of a load Yes
Switching frequency
● with resistive load, max. 100 Hz
● with inductive load, max. 0.5 Hz
● on lamp load, max. 100 Hz
● of the pulse outputs, with resistive load, max. 2.5 kHz
Total current of the outputs (per group)
horizontal installation
— up to 40 °C, max. 3A
— up to 60 °C, max. 2A
vertical installation
— up to 40 °C, max. 2A
Cable length
● shielded, max. 1 000 m
● unshielded, max. 600 m
Analog inputs
Number of analog inputs 5
● For voltage/current measurement 4
● For resistance/resistance thermometer measurement 1
integrated channels (AI) 5; 4x current/voltage, 1x resistance
permissible input voltage for current input (destruction limit), 5 V; Permanent
max.
permissible input voltage for voltage input (destruction limit), 30 V; Permanent
max.
permissible input current for voltage input (destruction limit), 0.5 mA; Permanent
max.
permissible input current for current input (destruction limit), 50 mA; Permanent
max.
Electrical input frequency, max. 400 Hz
No-load voltage for resistance-type transmitter, typ. 3.3 V
Constant measurement current for resistance-type transmitter, 1.25 mA
typ.
Technical unit for temperature measurement adjustable Yes; Degrees Celsius / degrees Fahrenheit / Kelvin
Input ranges
● Voltage Yes; ±10 V / 100 kΩ; 0 V to 10 V / 100 kΩ
● Current Yes; ±20 mA / 100 Ω; 0 mA to 20 mA / 100 Ω; 4 mA to 20 mA / 100 Ω
● Resistance thermometer Yes; Pt 100 / 10 MΩ
● Resistance Yes; 0 Ω to 600 Ω / 10 MΩ
Input ranges (rated values), voltages
● 0 to +10 V Yes
— Input resistance (0 to 10 V) 100 kΩ
Input ranges (rated values), currents
● 0 to 20 mA Yes
— Input resistance (0 to 20 mA) 100 Ω
● -20 mA to +20 mA Yes
— Input resistance (-20 mA to +20 mA) 100 Ω
● 4 mA to 20 mA Yes
— Input resistance (4 mA to 20 mA) 100 Ω
Input ranges (rated values), resistance thermometer
● Pt 100 Yes
— Input resistance (Pt 100) 10 MΩ
Input ranges (rated values), resistors
● 0 to 600 ohms Yes
— Input resistance (0 to 600 ohms) 10 MΩ
Thermocouple (TC)

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 Temperature compensation
— parameterizable No
Characteristic linearization
● parameterizable Yes; by software
— for resistance thermometer Pt 100
Cable length
● shielded, max. 100 m
Analog outputs
integrated channels (AO) 2
Voltage output, short-circuit protection Yes
Voltage output, short-circuit current, max. 55 mA
Current output, no-load voltage, max. 14 V
Output ranges, voltage
● 0 to 10 V Yes
● -10 V to +10 V Yes
Output ranges, current
● 0 to 20 mA Yes
● -20 mA to +20 mA Yes
● 4 mA to 20 mA Yes
Connection of actuators
● for voltage output two-wire connection Yes; Without compensation of the line resistances
● for voltage output four-wire connection No
● for current output two-wire connection Yes
Load impedance (in rated range of output)
● with voltage outputs, min. 1 kΩ
● with voltage outputs, capacitive load, max. 0.1 µF
● with current outputs, max. 300 Ω
● with current outputs, inductive load, max. 0.1 mH
Destruction limits against externally applied voltages and currents
● Voltages at the outputs towards MANA 16 V; Permanent
● Current, max. 50 mA; Permanent
Cable length
● shielded, max. 200 m
Analog value generation for the inputs
Measurement principle Actual value encryption (successive approximation)
Integration and conversion time/resolution per channel
● Resolution with overrange (bit including sign), max. 12 bit
● Integration time, parameterizable Yes; 16.6 / 20 ms
● Interference voltage suppression for interference 50 / 60 Hz
frequency f1 in Hz
● Time constant of the input filter 0.38 ms
● Basic execution time of the module (all channels 1 ms
released)
Analog value generation for the outputs
Integration and conversion time/resolution per channel
● Resolution with overrange (bit including sign), max. 12 bit
● Conversion time (per channel) 1 ms
Settling time
● for resistive load 0.6 ms
● for capacitive load 1 ms
● for inductive load 0.5 ms
Encoder
Connection of signal encoders
● for voltage measurement Yes
● for current measurement as 2-wire transducer Yes; with external supply
● for current measurement as 4-wire transducer Yes
● for resistance measurement with two-wire connection Yes; Without compensation of the line resistances
● for resistance measurement with three-wire connection No
● for resistance measurement with four-wire connection No
Connectable encoders
● 2-wire sensor Yes

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 — permissible quiescent current (2-wire sensor), max. 1.5 mA
Errors/accuracies
Temperature error (relative to input range), (+/-) 0.006 %/K
Crosstalk between the inputs, min. 60 dB
Repeat accuracy in steady state at 25 °C (relative to input 0.06 %
range), (+/-)
Output ripple (relative to output range, bandwidth 0 to 50 kHz), 0.1 %
(+/-)
Linearity error (relative to output range), (+/-) 0.15 %
Temperature error (relative to output range), (+/-) 0.01 %/K
Crosstalk between the outputs, min. 60 dB
Repeat accuracy in steady state at 25 °C (relative to output 0.06 %
range), (+/-)
Operational error limit in overall temperature range
● Voltage, relative to input range, (+/-) 1%
● Current, relative to input range, (+/-) 1%
● Resistance, relative to input range, (+/-) 1%
● Voltage, relative to output range, (+/-) 1%
● Current, relative to output range, (+/-) 1%
Basic error limit (operational limit at 25 °C)
● Voltage, relative to input range, (+/-) 0.8 %; Linearity error ±0.06 %
● Current, relative to input range, (+/-) 0.8 %; Linearity error ±0.06 %
● Resistance, relative to input range, (+/-) 0.8 %; Linearity error ±0.2 %
● Resistance thermometer, relative to input range, (+/-) 0.8 %
● Voltage, relative to output range, (+/-) 0.8 %
● Current, relative to output range, (+/-) 0.8 %
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency
● Series mode interference (peak value of interference < 30 dB
rated value of input range), min.
● Common mode interference, min. 40 dB
Interfaces
Number of PROFINET interfaces 0
Number of RS 485 interfaces 1; MPI
Number of RS 422 interfaces 1; RS 422 / 485 combined
Point-to-point connection
● Cable length, max. 1 200 m
Integrated protocol driver
— 3964 (R) Yes
— ASCII Yes
— RK 512 Yes
Transmission rate, RS 422/485
— with 3964 (R) protocol, max. 19.2 kbit/s; 38.4 kbit/s half duplex; 19.2 kbit/s full duplex
— with ASCII protocol, max. 19.2 kbit/s; 38.4 kbit/s half duplex; 19.2 kbit/s full duplex
— with RK 512 protocol, max. 19.2 kbit/s; 38.4 kbit/s half duplex; 19.2 kbit/s full duplex
1. Interface
Interface type Integrated RS 485 interface
Isolated No
Interface types
● RS 485 Yes
● Output current of the interface, max. 200 mA
Protocols
● MPI Yes
● PROFIBUS DP master No
● PROFIBUS DP device No
● Point-to-point connection No
MPI
● Transmission rate, max. 187.5 kbit/s
Services
— PG/OP communication Yes
— Routing No
— Global data communication Yes
— S7 basic communication Yes

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 — S7 communication Yes; Only server, configured on one side
— S7 communication, as client No; but via CP and loadable FB
— S7 communication, as server Yes
2. Interface
Interface type Integrated RS 422/ 485 interface
Isolated Yes
Interface types
● RS 485 Yes; RS 422 / 485 (X.27)
● Output current of the interface, max. No
Protocols
● MPI No
● PROFINET IO Controller No
● PROFINET IO Device No
● PROFINET CBA No
● PROFIBUS DP master No
● PROFIBUS DP device No
● Point-to-point connection Yes
Point-to-point connection
● Transmission rate, max. 19.2 kbit/s; 38.4 kbit/s half duplex; 19.2 kbit/s full duplex
● Interface controllable from the user program Yes
● Interface can trigger alarm/interrupt in the user program Yes; Message on break - identification
Protocols
PROFIsafe No
communication functions / header
PG/OP communication Yes
Data record routing No
Global data communication
● supported Yes
● Number of GD loops, max. 8
● Number of GD packets, max. 8
● Number of GD packets, transmitter, max. 8
● Number of GD packets, receiver, max. 8
● Size of GD packets, max. 22 byte
● Size of GD packet (of which consistent), max. 22 byte
S7 basic communication
● supported Yes
● User data per job, max. 76 byte
● User data per job (of which consistent), max. 76 byte; 76 bytes (with X_SEND or X_RCV); 64 bytes (with X_PUT or X_GET
as server)
S7 communication
● supported Yes
● as server Yes
● as client Yes; Via CP and loadable FB
● User data per job, max. 180 kbyte; With PUT/GET
● User data per job (of which consistent), max. 240 byte; as server
S5 compatible communication
● supported Yes; via CP and loadable FC
Number of connections
● overall 12
● usable for PG communication 11
— reserved for PG communication 1
— adjustable for PG communication, min. 1
— adjustable for PG communication, max. 11
● usable for OP communication 11
— reserved for OP communication 1
— adjustable for OP communication, min. 1
— adjustable for OP communication, max. 11
● usable for S7 basic communication 8
— reserved for S7 basic communication 0
— adjustable for S7 basic communication, min. 0
— adjustable for S7 basic communication, max. 8

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S7 message functions
Number of login stations for message functions, max. 12; Depending on the configured connections for PG/OP and S7 basic
communication
Process diagnostic messages Yes
simultaneously active Alarm_S blocks, max. 300
Test commissioning functions
Status block Yes; Up to 2 simultaneously
Single step Yes
Number of breakpoints 4
Status/control
● Status/control variable Yes
● Variables Inputs, outputs, memory bits, DB, times, counters
● Number of variables, max. 30
— of which status variables, max. 30
— of which control variables, max. 14
Forcing
● Forcing Yes
● Forcing, variables Inputs, outputs
● Number of variables, max. 10
Diagnostic buffer
● present Yes
● Number of entries, max. 500
— adjustable No
— of which powerfail-proof 100; Only the last 100 entries are retained
● Number of entries readable in RUN, max. 499
— adjustable Yes; From 10 to 499
— preset 10
Service data
● can be read out Yes
Interrupts/diagnostics/status information
Diagnostics indication LED
● Status indicator digital input (green) Yes
● Status indicator digital output (green) Yes
Integrated Functions
Counter
● Number of counters 4; See "Technological Functions" manual
● Counting frequency, max. 60 kHz
Frequency measurement Yes
● Number of frequency meters 4; up to 60 kHz (see "Technological Functions" manual)
controlled positioning Yes
integrated function blocks (closed-loop control) Yes; PID controller (see "Technological Functions" manual)
PID controller Yes
Number of pulse outputs 4; Pulse width modulation up to 2.5 kHz (see "Technological Functions"
Manual)
Limit frequency (pulse) 2.5 kHz
Potential separation
Potential separation digital inputs
● Potential separation digital inputs Yes
● between the channels No
● between the channels and backplane bus Yes
Potential separation digital outputs
● Potential separation digital outputs Yes
● between the channels Yes
● between the channels, in groups of 8
● between the channels and backplane bus Yes
Potential separation analog inputs
● Potential separation analog inputs Yes; common for analog I/O
● between the channels No
● between the channels and backplane bus Yes
Potential separation analog outputs
● Potential separation analog outputs Yes; common for analog I/O

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 ● between the channels No
● between the channels and backplane bus Yes
Isolation
Isolation tested with 600 V DC
Ambient conditions
Ambient temperature during operation
● min. 0 °C
● max. 60 °C
configuration / header
Configuration software
● STEP 7 Yes; STEP 7 V5.5 + SP1 or higher or STEP 7 V5.3 + SP2 or higher with HSP
203
● STEP 7 Lite No
configuration / programming / header
● Command set see instruction list
● Nesting levels 8
● System functions (SFC) see instruction list
● System function blocks (SFB) see instruction list
Programming language
— LAD Yes
— FBD Yes
— STL Yes
— SCL Yes
— CFC Yes
— GRAPH Yes
— HiGraph® Yes
Know-how protection
● User program protection/password protection Yes
● Block encryption Yes; With S7 block Privacy
Dimensions
Width 120 mm
Height 125 mm
Depth 130 mm
Weights
Weight, approx. 680 g
Classifications
Version Classification

eClass 14 27-24-22-07
eClass 12 27-24-22-07
eClass 9.1 27-24-22-07
eClass 9 27-24-22-07
eClass 8 27-24-22-07
eClass 7.1 27-24-22-07
eClass 6 27-24-22-07
ETIM 9 EC000236
ETIM 8 EC000236
ETIM 7 EC000236
IDEA 4 3565
UNSPSC 15 32-15-17-05

Approvals / Certificates
General Product Approval

Miscellaneous Manufacturer Declara- Metrological Approval

tion

General Product Ap- EMV For use in hazardous locations

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 proval

FM

For use in hazardous locations Maritime application

Miscellaneous CCC-Ex

Maritime application

CCS (China Classifica-

tion Society)

last modified: 4/7/2025

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