	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
	OB
	● Number, max.		Limited only by RAM for code
	Data areas and their retentivity
	Retentive data area (incl. timers, counters, flags), max.		14 kbyte
	Flag
	● Size, max.		4 kbyte; Size of bit memory address area
	Local data
	● per priority class, max.		16 kbyte; Priority class 1 (program cycle): 16 KB, priority class 2 to 26: 6 KB
	Address area
	Process image
	● Inputs, adjustable ● Outputs, adjustable		1 kbyte 1 kbyte
	Hardware configuration
	Number of modules per system, max.		3 communication modules, 1 signal board
	Time of day
	Clock
	● Hardware clock (real-time) ● Backup time ● Deviation per day, max.		Yes 480 h; Typical ±60 s/month at 25 °C
	Digital inputs
	Number of digital inputs ● of which inputs usable for technological functions		6; Integrated 6; HSC (High Speed Counting) Yes
	Source/sink input
	Number of simultaneously controllable inputs
	all mounting positions
	— up to 40 °C, max.		6
	Input voltage
	● Rated value (DC) ● for signal “0” ● for signal “1”		24 V 5 V DC at 1 mA 15 V DC at 2.5 mA
	Input current
	● for signal “1”, typ.		4 mA; nominal
	Input delay (for rated value of input voltage)
	for standard inputs
	— parameterizable		0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in
			groups of four
	— at “0” to “1”, min.		0.2 ms
	— at “0” to “1”, max.		12.8 ms
	for interrupt inputs
	— parameterizable		Yes
	for technological functions
	— parameterizable		Single phase : 3 @ 100 kHz, differential: 3 @ 80 kHz
	Cable length
	● shielded, max. ● unshielded, max.		500 m; 50 m for technological functions 300 m; for technological functions: No
	Digital outputs
	Number of digital outputs		4; Relays
	Switching capacity of the outputs
	● with resistive load, max. ● on lamp load, max.		2 A 30 W with DC, 200 W with AC
	Output delay with resistive load
	● “0” to “1”, max. ● “1” to “0”, max.		10 ms; max. 10 ms; max.
	Relay outputs
	● Number of relay outputs		4

● Number of operating cycles, max.		mechanically 10 million, at rated load voltage 100 000
Cable length
● shielded, max. ● unshielded, max.		500 m 150 m
Analog inputs
Number of analog inputs		2
Input ranges
● Voltage		Yes
Input ranges (rated values), voltages
● 0 to +10 V — Input resistance (0 to 10 V)		Yes ≥100k ohms
Cable length
● shielded, max.		100 m; twisted and shielded
Analog outputs
Number of analog outputs		0
Analog value generation for the inputs
Integration and conversion time/resolution per channel
● Resolution with overrange (bit including sign), max. ● Integration time, parameterizable ● Conversion time (per channel)		10 bit Yes 625 µs
Encoder
Connectable encoders
● 2-wire sensor		Yes
1. Interface
Interface type		PROFINET
Isolated		Yes
automatic detection of transmission rate		Yes
Autonegotiation		Yes
Autocrossing		Yes
Interface types
● RJ 45 (Ethernet) ● Number of ports ● integrated switch		Yes 1 No
Protocols
● PROFINET IO Controller		Yes
● PROFINET IO Device		Yes
● SIMATIC communication		Yes
● Open IE communication		Yes; Optionally also encrypted
● Web server		Yes
● Media redundancy		No
PROFINET IO Controller
● Transmission rate, max.		100 Mbit/s
Services
— PG/OP communication		Yes; encryption with TLS V1.3 pre-selected
— Isochronous mode		No
— IRT		No
— PROFIenergy		No
— Prioritized startup		Yes
— Number of IO devices with prioritized startup, max.		16
— Number of connectable IO Devices, max.		16
— Number of connectable IO Devices for RT, max.		16
— of which in line, max.		16
— Activation/deactivation of IO Devices		Yes
— Number of IO Devices that can be simultaneously		8
activated/deactivated, max.
— Updating time		The minimum value of the update time also depends on the communication
		component set for PROFINET IO, on the number of IO devices and the quantity
		of configured user data.
PROFINET IO Device
Services
— PG/OP communication		Yes; encryption with TLS V1.3 pre-selected
— Isochronous mode — IRT — PROFIenergy — Shared device — Number of IO Controllers with shared device, max.		No No Yes Yes 2
Protocols
Supports protocol for PROFINET IO		Yes
PROFIsafe		No
PROFIBUS		Yes; CM 1243-5 (master) or CM 1242-5 (slave) required
OPC UA		Yes; OPC UA Server
AS-Interface		Yes; CM 1243-2 required
Protocols (Ethernet)
● TCP/IP		Yes
● DHCP		No
● SNMP		Yes
● DCP		Yes
● LLDP		Yes
Redundancy mode
Media redundancy
— MRP — MRPD		No No
SIMATIC communication
● S7 routing		Yes
Open IE communication
● TCP/IP		Yes
— Data length, max.		8 kbyte
— several passive connections per port, supported		Yes
● ISO-on-TCP (RFC1006)		Yes
— Data length, max.		8 kbyte
● UDP		Yes
— Data length, max.		1 472 byte
Web server
● supported ● User-defined websites		Yes Yes
OPC UA
● Runtime license required		Yes; “Basic” license required
● OPC UA Server		Yes; data access (read, write, subscribe), method call, runtime license required
— Application authentication		Available security policies: None, Basic128Rsa15, Basic256Rsa15,
		Basic256Sha256
— User authentication		“anonymous” or by user name & password
— Number of sessions, max.		10
— Number of subscriptions per session, max.		5
— Sampling interval, min.		100 ms
— Publishing interval, min.		200 ms
— Number of server methods, max.		20
— Number of monitored items, recommended max.		1 000
— Number of server interfaces, max.		2
— Number of nodes for user-defined server interfaces,		2 000
max.
Further protocols
● MODBUS		Yes
communication functions / header
S7 communication
● supported		Yes
● as server		Yes
● as client		Yes
● User data per job, max.		See online help (S7 communication, user data size)
Number of connections
● overall		PG Connections: 4 reserved / 4 max; HMI Connections: 12 reserved / 18 max; S7 Connections: 8 reserved / 14 max; Open User Connections: 8 reserved / 14 max; Web Connections: 2 reserved / 30 max; OPC UA Connections: 0 reserved / 10 max; Total Connections: 34 reserved / 64 max
Test commissioning functions
Status/control
● Status/control variable ● Variables		Yes Inputs/outputs, memory bits, DBs, distributed I/Os, timers, counters
Forcing
● Forcing		Yes
Diagnostic buffer
● present		Yes
Traces
● Number of configurable Traces ● Memory size per trace, max.		2 512 kbyte
Interrupts/diagnostics/status information
Diagnostics indication LED
● RUN/STOP LED ● ERROR LED ● MAINT LED		Yes Yes Yes
Integrated Functions
Counter ● Number of counters ● Counting frequency, max.		6 100 kHz Yes Yes 8 Up to 4 with SB 1222 Yes 4
Frequency measurement
controlled positioning
Number of position-controlled positioning axes, max.
Number of positioning axes via pulse-direction interface
PID controller
Number of alarm inputs
Potential separation
Potential separation digital inputs
● Potential separation digital inputs ● between the channels, in groups of		500V AC for 1 minute 1
Potential separation digital outputs
● Potential separation digital outputs ● between the channels ● between the channels, in groups of		Relays No 1
EMC
Interference immunity against discharge of static electricity
● Interference immunity against discharge of static electricity acc. to IEC 61000-4-2 — Test voltage at air discharge — Test voltage at contact discharge		Yes 8 kV 6 kV
Interference immunity to cable-borne interference
● Interference immunity on supply lines acc. to IEC 61000- 4-4 ● Interference immunity on signal cables acc. to IEC 61000- 4-4		Yes Yes
Interference immunity against voltage surge
● Interference immunity on supply lines acc. to IEC 61000- 4-5		Yes
Interference immunity against conducted variable disturbance induced by high-frequency fields
● Interference immunity against high-frequency radiation acc. to IEC 61000-4-6		Yes
Emission of radio interference acc. to EN 55 011
● Limit class A, for use in industrial areas ● Limit class B, for use in residential areas		Yes; Group 1 Yes; When appropriate measures are used to ensure compliance with the limits for Class B according to EN 55011
Degree and class of protection
IP degree of protection		IP20
Standards, approvals, certificates
CE mark		Yes Yes Yes Yes
UL approval
cULus
FM approval
RCM (formerly C-TICK)		Yes YesYes
KC approval
Marine approval
Ambient conditions
Free fall
● Fall height, max.		0.3 m; five times, in product package
Ambient temperature during operation
● min. ● max. ● horizontal installation, min. ● horizontal installation, max. ● vertical installation, min. ● vertical installation, max.		-20 °C 60 °C -20 °C 60 °C -20 °C 50 °C
Ambient temperature during storage/transportation
● min. ● max.		-40 °C 70 °C
Air pressure acc. to IEC 60068-2-13
● Operation, min. ● Operation, max. ● Storage/transport, min. ● Storage/transport, max.		795 hPa 1 080 hPa 660 hPa 1 080 hPa
Altitude during operation relating to sea level
● Installation altitude, min. ● Installation altitude, max.		-1 000 m 5 000 m; Restrictions for installation altitudes > 2 000 m, see manual
Relative humidity
● Operation, max.		95 %; no condensation
Vibrations
● Vibration resistance during operation acc. to IEC 60068- 2-6 ● Operation, tested according to IEC 60068-2-6		2 g (m/s²) wall mounting, 1 g (m/s²) DIN rail Yes
Shock testing
● tested according to IEC 60068-2-27		Yes; IEC 68, Part 2-27 half-sine: strength of the shock 15 g (peak value), duration 11 ms
Pollutant concentrations
● SO2 at RH < 60% without condensation		S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free
configuration / header
configuration / programming / header
Programming language
— LAD — FBD — SCL		Yes Yes Yes
Know-how protection
● User program protection/password protection ● Copy protection ● Block protection		Yes Yes Yes
Access protection
● protection of confidential configuration data ● Protection level: Write protection ● Protection level: Read/write protection ● Protection level: Complete protection		Yes Yes Yes Yes
programming / cycle time monitoring / header
● adjustable		Yes
Dimensions
Width		90 mm 100 mm 75 mm
Height
Depth
Weights
Weight, approx.		380 g

Dimensions	90 × 100 × 75 cm
Product type designation	CPU 1211C DC/DC/relay
Firmware version	V4.5
Programming package	STEP 7 V17 or higher
Rated value (DC) ● 24 V DC	yes
permissible range, lower limit (DC)	20.4 V
Reverse polarity protection	yes
Load voltage/Rated value (DC)	24 V
Load voltage/permissible range, lower limit (DC)	20.4 V
Load voltage L+/	28.8 V
Current consumption, max	900 mA; CPU with all expansion modules
Inrush current, max.	12 A; at 28.8 V DC
I²t	0.8 A²·s
for backplane bus (5 V DC), max	750 mA; Max. 5 V DC for CM
24 V encoder supply	L+ minus 4 V DC min.
Power loss, typ	8 W
Work memory / integrated	50 kbyte
Load memory / integrated	1 Mbyte
Backup / present	yes
Backup / maintenance-free	yes
Backup / without battery	yes
for bit operations, typ	0.08 µs; / instruction
for floating point arithmetic	2.3 µs; / instruction
Brand	SIEMENS

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SIEMENS

SIEMENS- 6ES7211-1HE40-0XB0

SIMATIC S7-1200, CPU 1211C, compact CPU, DC/DC/relay, onboard I/O: 6 DI 24
V DC; 4 DO relay 2A; 2 AI 0-10 V DC, Power supply: DC 20.4-28.8V DC,
Program/data memory 50 KB

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Category: Automation & Instrumentation

Description

	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
	OB
	● Number, max.		Limited only by RAM for code
	Data areas and their retentivity
	Retentive data area (incl. timers, counters, flags), max.		14 kbyte
	Flag
	● Size, max.		4 kbyte; Size of bit memory address area
	Local data
	● per priority class, max.		16 kbyte; Priority class 1 (program cycle): 16 KB, priority class 2 to 26: 6 KB
	Address area
	Process image
	● Inputs, adjustable ● Outputs, adjustable		1 kbyte 1 kbyte
	Hardware configuration
	Number of modules per system, max.		3 communication modules, 1 signal board
	Time of day
	Clock
	● Hardware clock (real-time) ● Backup time ● Deviation per day, max.		Yes 480 h; Typical ±60 s/month at 25 °C
	Digital inputs
	Number of digital inputs ● of which inputs usable for technological functions		6; Integrated 6; HSC (High Speed Counting) Yes
	Source/sink input
	Number of simultaneously controllable inputs
	all mounting positions
	— up to 40 °C, max.		6
	Input voltage
	● Rated value (DC) ● for signal “0” ● for signal “1”		24 V 5 V DC at 1 mA 15 V DC at 2.5 mA
	Input current
	● for signal “1”, typ.		4 mA; nominal
	Input delay (for rated value of input voltage)
	for standard inputs
	— parameterizable		0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in
			groups of four
	— at “0” to “1”, min.		0.2 ms
	— at “0” to “1”, max.		12.8 ms
	for interrupt inputs
	— parameterizable		Yes
	for technological functions
	— parameterizable		Single phase : 3 @ 100 kHz, differential: 3 @ 80 kHz
	Cable length
	● shielded, max. ● unshielded, max.		500 m; 50 m for technological functions 300 m; for technological functions: No
	Digital outputs
	Number of digital outputs		4; Relays
	Switching capacity of the outputs
	● with resistive load, max. ● on lamp load, max.		2 A 30 W with DC, 200 W with AC
	Output delay with resistive load
	● “0” to “1”, max. ● “1” to “0”, max.		10 ms; max. 10 ms; max.
	Relay outputs
	● Number of relay outputs		4

● Number of operating cycles, max.		mechanically 10 million, at rated load voltage 100 000
Cable length
● shielded, max. ● unshielded, max.		500 m 150 m
Analog inputs
Number of analog inputs		2
Input ranges
● Voltage		Yes
Input ranges (rated values), voltages
● 0 to +10 V — Input resistance (0 to 10 V)		Yes ≥100k ohms
Cable length
● shielded, max.		100 m; twisted and shielded
Analog outputs
Number of analog outputs		0
Analog value generation for the inputs
Integration and conversion time/resolution per channel
● Resolution with overrange (bit including sign), max. ● Integration time, parameterizable ● Conversion time (per channel)		10 bit Yes 625 µs
Encoder
Connectable encoders
● 2-wire sensor		Yes
1. Interface
Interface type		PROFINET
Isolated		Yes
automatic detection of transmission rate		Yes
Autonegotiation		Yes
Autocrossing		Yes
Interface types
● RJ 45 (Ethernet) ● Number of ports ● integrated switch		Yes 1 No
Protocols
● PROFINET IO Controller		Yes
● PROFINET IO Device		Yes
● SIMATIC communication		Yes
● Open IE communication		Yes; Optionally also encrypted
● Web server		Yes
● Media redundancy		No
PROFINET IO Controller
● Transmission rate, max.		100 Mbit/s
Services
— PG/OP communication		Yes; encryption with TLS V1.3 pre-selected
— Isochronous mode		No
— IRT		No
— PROFIenergy		No
— Prioritized startup		Yes
— Number of IO devices with prioritized startup, max.		16
— Number of connectable IO Devices, max.		16
— Number of connectable IO Devices for RT, max.		16
— of which in line, max.		16
— Activation/deactivation of IO Devices		Yes
— Number of IO Devices that can be simultaneously		8
activated/deactivated, max.
— Updating time		The minimum value of the update time also depends on the communication
		component set for PROFINET IO, on the number of IO devices and the quantity
		of configured user data.
PROFINET IO Device
Services
— PG/OP communication		Yes; encryption with TLS V1.3 pre-selected
— Isochronous mode — IRT — PROFIenergy — Shared device — Number of IO Controllers with shared device, max.		No No Yes Yes 2
Protocols
Supports protocol for PROFINET IO		Yes
PROFIsafe		No
PROFIBUS		Yes; CM 1243-5 (master) or CM 1242-5 (slave) required
OPC UA		Yes; OPC UA Server
AS-Interface		Yes; CM 1243-2 required
Protocols (Ethernet)
● TCP/IP		Yes
● DHCP		No
● SNMP		Yes
● DCP		Yes
● LLDP		Yes
Redundancy mode
Media redundancy
— MRP — MRPD		No No
SIMATIC communication
● S7 routing		Yes
Open IE communication
● TCP/IP		Yes
— Data length, max.		8 kbyte
— several passive connections per port, supported		Yes
● ISO-on-TCP (RFC1006)		Yes
— Data length, max.		8 kbyte
● UDP		Yes
— Data length, max.		1 472 byte
Web server
● supported ● User-defined websites		Yes Yes
OPC UA
● Runtime license required		Yes; “Basic” license required
● OPC UA Server		Yes; data access (read, write, subscribe), method call, runtime license required
— Application authentication		Available security policies: None, Basic128Rsa15, Basic256Rsa15,
		Basic256Sha256
— User authentication		“anonymous” or by user name & password
— Number of sessions, max.		10
— Number of subscriptions per session, max.		5
— Sampling interval, min.		100 ms
— Publishing interval, min.		200 ms
— Number of server methods, max.		20
— Number of monitored items, recommended max.		1 000
— Number of server interfaces, max.		2
— Number of nodes for user-defined server interfaces,		2 000
max.
Further protocols
● MODBUS		Yes
communication functions / header
S7 communication
● supported		Yes
● as server		Yes
● as client		Yes
● User data per job, max.		See online help (S7 communication, user data size)
Number of connections
● overall		PG Connections: 4 reserved / 4 max; HMI Connections: 12 reserved / 18 max; S7 Connections: 8 reserved / 14 max; Open User Connections: 8 reserved / 14 max; Web Connections: 2 reserved / 30 max; OPC UA Connections: 0 reserved / 10 max; Total Connections: 34 reserved / 64 max
Test commissioning functions
Status/control
● Status/control variable ● Variables		Yes Inputs/outputs, memory bits, DBs, distributed I/Os, timers, counters
Forcing
● Forcing		Yes
Diagnostic buffer
● present		Yes
Traces
● Number of configurable Traces ● Memory size per trace, max.		2 512 kbyte
Interrupts/diagnostics/status information
Diagnostics indication LED
● RUN/STOP LED ● ERROR LED ● MAINT LED		Yes Yes Yes
Integrated Functions
Counter ● Number of counters ● Counting frequency, max.		6 100 kHz Yes Yes 8 Up to 4 with SB 1222 Yes 4
Frequency measurement
controlled positioning
Number of position-controlled positioning axes, max.
Number of positioning axes via pulse-direction interface
PID controller
Number of alarm inputs
Potential separation
Potential separation digital inputs
● Potential separation digital inputs ● between the channels, in groups of		500V AC for 1 minute 1
Potential separation digital outputs
● Potential separation digital outputs ● between the channels ● between the channels, in groups of		Relays No 1
EMC
Interference immunity against discharge of static electricity
● Interference immunity against discharge of static electricity acc. to IEC 61000-4-2 — Test voltage at air discharge — Test voltage at contact discharge		Yes 8 kV 6 kV
Interference immunity to cable-borne interference
● Interference immunity on supply lines acc. to IEC 61000- 4-4 ● Interference immunity on signal cables acc. to IEC 61000- 4-4		Yes Yes
Interference immunity against voltage surge
● Interference immunity on supply lines acc. to IEC 61000- 4-5		Yes
Interference immunity against conducted variable disturbance induced by high-frequency fields
● Interference immunity against high-frequency radiation acc. to IEC 61000-4-6		Yes
Emission of radio interference acc. to EN 55 011
● Limit class A, for use in industrial areas ● Limit class B, for use in residential areas		Yes; Group 1 Yes; When appropriate measures are used to ensure compliance with the limits for Class B according to EN 55011
Degree and class of protection
IP degree of protection		IP20
Standards, approvals, certificates
CE mark		Yes Yes Yes Yes
UL approval
cULus
FM approval
RCM (formerly C-TICK)		Yes YesYes
KC approval
Marine approval
Ambient conditions
Free fall
● Fall height, max.		0.3 m; five times, in product package
Ambient temperature during operation
● min. ● max. ● horizontal installation, min. ● horizontal installation, max. ● vertical installation, min. ● vertical installation, max.		-20 °C 60 °C -20 °C 60 °C -20 °C 50 °C
Ambient temperature during storage/transportation
● min. ● max.		-40 °C 70 °C
Air pressure acc. to IEC 60068-2-13
● Operation, min. ● Operation, max. ● Storage/transport, min. ● Storage/transport, max.		795 hPa 1 080 hPa 660 hPa 1 080 hPa
Altitude during operation relating to sea level
● Installation altitude, min. ● Installation altitude, max.		-1 000 m 5 000 m; Restrictions for installation altitudes > 2 000 m, see manual
Relative humidity
● Operation, max.		95 %; no condensation
Vibrations
● Vibration resistance during operation acc. to IEC 60068- 2-6 ● Operation, tested according to IEC 60068-2-6		2 g (m/s²) wall mounting, 1 g (m/s²) DIN rail Yes
Shock testing
● tested according to IEC 60068-2-27		Yes; IEC 68, Part 2-27 half-sine: strength of the shock 15 g (peak value), duration 11 ms
Pollutant concentrations
● SO2 at RH < 60% without condensation		S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free
configuration / header
configuration / programming / header
Programming language
— LAD — FBD — SCL		Yes Yes Yes
Know-how protection
● User program protection/password protection ● Copy protection ● Block protection		Yes Yes Yes
Access protection
● protection of confidential configuration data ● Protection level: Write protection ● Protection level: Read/write protection ● Protection level: Complete protection		Yes Yes Yes Yes
programming / cycle time monitoring / header
● adjustable		Yes
Dimensions
Width		90 mm 100 mm 75 mm
Height
Depth
Weights
Weight, approx.		380 g

Additional information

Dimensions	90 × 100 × 75 cm
Product type designation	CPU 1211C DC/DC/relay
Firmware version	V4.5
Programming package	STEP 7 V17 or higher
Rated value (DC) ● 24 V DC	yes
permissible range, lower limit (DC)	20.4 V
Reverse polarity protection	yes
Load voltage/Rated value (DC)	24 V
Load voltage/permissible range, lower limit (DC)	20.4 V
Load voltage L+/	28.8 V
Current consumption, max	900 mA; CPU with all expansion modules
Inrush current, max.	12 A; at 28.8 V DC
I²t	0.8 A²·s
for backplane bus (5 V DC), max	750 mA; Max. 5 V DC for CM
24 V encoder supply	L+ minus 4 V DC min.
Power loss, typ	8 W
Work memory / integrated	50 kbyte
Load memory / integrated	1 Mbyte
Backup / present	yes
Backup / maintenance-free	yes
Backup / without battery	yes
for bit operations, typ	0.08 µs; / instruction
for floating point arithmetic	2.3 µs; / instruction
Brand	SIEMENS

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