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Siemens 6ES7288-1ST40-0AA1 — DIN Rail Power Supplies

Siemens 6ES7288-1ST40-0AA1 S7-1200 CPU, 24KB program, 70°C

MPN6ES7288-1ST40-0AA1

Siemens S7-1200 CPU 6ES7288-1ST40-0AA1, 24 kbyte program memory, 144 byte digital/analog I/O, PID closed-loop control, PROFIBUS via CM DP module, CE marked.

$450.00Ref. price · indicative, final on quote
Siemens 6ES7288-1ST40-0AA1 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7288-1ST40-0AA1 key specifications
ParameterValue
TypeHardware clock, no battery backup
InterfaceRS 485 (max. 187.5 kbps)
Type of memoryDDR
Type of input voltageDC
Test voltage at air discharge8 kV
Test voltage at contact discharge4 kV
Current output, max.300 mA; 24 V DC Sensor Power
Inrush current, max.11.7 A; at 28.8 V
Current consumption, max.680 mA; 24 V DC
For signal "0" residual current, max.10 µA
Interference emission via line (AC current cables)EN 61000-6-4, interference emission: Intended for use in industrial areas.
For signal "0", max. (Permissible quiescent current)1 mA

All specifications

6ES7288-1ST40-0AA1 additional specifications
ParameterValue
Power loss, max.18 W
S7 communicationYes
PROFINET IO deviceYes; I-Device since V2.5
PROFINET IO controllerYes; Since V2.4
Number of RS 485 interfaces1
Supports protocol for PROFINET IOYes; RT Controller (since FW V2.4) & I-Device (since FW V2.5)
Number of industrial ethernet interfaces1
Rail mountingYes; Standard - DIN rail
Installation altitude, max.2 000 m
Installation altitude, min.-1 000 m
Vertical installation, max.50 °C
Vertical installation, min.-20 °C
Horizontal installation, max.60 °C
Horizontal installation, min.-20 °C
Depth81 mm
Width125 mm
Height100 mm
Weight, approx.410.3 g
Fall height, max.0.3 m; five times, in product package
CE markYes
FBDYes
LADYes
RAMYes
STLYes
Max.70 °C
Min.-40 °C
FlashYes
Inputs144 byte; 256 bit of digital inputs & 56 words of analog inputs
RS 485Yes
TCP (IP)Yes
ForcingYes
Outputs144 byte; 256 bit of digital outputs & 56 words of analog outputs
PresentYes; Maintenance free, RTC requires 7 days.
IsolatedYes; Transformer isolated, 1,500V AC
PROFIBUSYes; Via CM DP module
As clientYes
As serverYes
SupportedYes
Backup time7 d
Memory size24 kbyte; Program memory
AutocrossingYes
Inputs, max.128 byte; Per device
Outputs, max.128 byte; Per device
Updating time4 ms; 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.
For signal "0"I0.0 to I0.3 < 1 V DC; I0.4 to I2.7 < 5 V DC
For signal "1"I0.0 to I0.3 > 4V; I0.4 to I2.7 > 15V
PID controllerYes; PID closed-loop control function: Continuous controller outputs, binary controller outputs, automatic/manual mode, max. 8 loops
Shielded, max.500 m
AutonegotiationYes
ParameterizableYes; 6 Single phase: 4 HSCs at 200 kHz; 2 HSCs at 30 kHz 4 A/B phase: 2 HSCs at 100 kHz; 2 HSCs at 20 kHz
"0" to "1", max.3 µs; of the standard outputs, max. 3 µs; of the pulse outputs, max. (Q a.0 to Q a.3) 1 µs
"1" to "0", max.200 µs; of the standard outputs, max. 200 µs; of the pulse outputs, max. (Q a.0 to Q a.3) 50 µs
RJ 45 (Ethernet)Yes
Rated value24 V
Unshielded, max.150 m
Micro memory cardYes; microSDHC Card (optional)
Source (sink input)Yes
Number of counters6
On lamp load, max.5 W
Up to 40 °C, max.24
At "0" to "1", max.12.8 ms
At "0" to "1", min.0.2 ms
Programming packageSTEP 7 Micro/WIN SMART
Between the channelsNo
For signal "1", min.20 V DC
For signal "1", typ.4 mA
Deviation per day, max.120 s; within 120s/month at 25 °C
Number of pulse outputs3
Number of relay outputs0
Status (control variable)Yes
Storage (transport, max.)1 080 hPa
Storage (transport, min.)660 hPa
Transmission rate, max.100 Mbit/s
For bit operations, typ.150 ns; / instruction
Number of digital inputs24; Integrated
For word operations, typ.1.2 µs; / instruction
Number of digital outputs16; Transistor
With resistive load, max.0.5 A
For signal "1" rated value0.5 A
Hardware clock (real-time)Yes
Of which High-Speed outputs3; 100 kHz Pulse Train Output
Memory available for user data16 kbyte
For backplane bus (5 v DC), max.1.4 A; max. 5 V DC for EM bus
Between the channels, in groups of2
For floating point arithmetic, typ.3.6 µs; / instruction
Permissible range, lower limit20.4 V
Permissible range, upper limit28.8 V
Number of connectable IO devices, max.8
Automatic detection of transmission rateYes; 10/100 Mbit/s
Limit class a, for use in industrial areasYes; EN 61000-6-4, interference emission: Intended for use in industrial areas.
Operation at 25 °C without condensation, max.95 %
Of the pulse outputs, with resistive load, max.100 kHz
Of which inputs usable for technological functions6; HSC (High Speed Counting)

Product details

CPU specification and integration note

The 6ES7288-1ST40-0AA1 is a Siemens S7-1200 CPU with 24 kbyte program memory, 144 bytes each of digital and analog inputs and outputs, and a hardware clock with no battery backup — the RTC is maintenance-free and holds for 7 days after power loss. It supports LAD, FBD, and STL programming, and includes a PID closed-loop control function for up to 8 loops. The CPU is parameterizable for 6 single-phase high-speed counters (4 at 200 kHz, 2 at 30 kHz) or 4 A/B phase counters (2 at 100 kHz, 2 at 20 kHz). PROFIBUS connectivity is available via a CM DP module.

Sourcing and fit considerations

The CPU occupies a 125 mm × 100 mm × 81 mm footprint on standard DIN rail. The RS 485 interface runs at up to 187.5 kbps, and the PROFINET interface supports autonegotiation and autocrossing. For a panel that was specified around the 6ES7223-1BL32-0XB0, note that this is a different CPU model — the I/O mapping and form factor differ; a full BOM review is required before substitution.

Frequently asked questions

What are the key ratings of 6ES7288-1ST40-0AA1?

24 kbyte program memory, 144 bytes each of digital and analog I/O, PID control for up to 8 loops, operating temperature -40 °C to 70 °C, and parameterizable high-speed counters up to 200 kHz.

MPN
6ES7288-1ST40-0AA1