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Siemens 6ES7288-1ST40-0AA0 — DIN Rail Power Supplies

Siemens 6ES7288-1ST40-0AA0 S7-1200 CPU, 24 KB program, 70 °C

MPN6ES7288-1ST40-0AA0

Siemens S7-1200 CPU, 6ES7288-1ST40-0AA0, 24 KB program memory, 144-byte I/O, PROFINET, RS-485, PID control, 8 high-speed counters, -40 to 70 °C.

$433.00 – $969.87Ref. price · indicative, final on quote
Siemens 6ES7288-1ST40-0AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7288-1ST40-0AA0 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
Short-circuit protectionNo
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.

All specifications

6ES7288-1ST40-0AA0 additional specifications
ParameterValue
For signal "0", max. (Permissible quiescent current)1 mA
Power loss, max.18 W
IP degree of protectionIP20
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.45 °C
Vertical installation, min.0 °C
Horizontal installation, max.55 °C
Horizontal installation, min.0 °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
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
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
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

The Siemens 6ES7288-1ST40-0AA0 is an S7-1200 CPU with 24 KB program memory, 144 bytes each of process-image inputs and outputs, and a maintenance-free RTC with 7-day backup. It supports LAD, FBD, STL, and RAM programming, and includes PROFINET (TCP/IP) with autonegotiation and autocrossing, plus an RS-485 interface for Modbus or point-to-point links.

I/O and memory map

The CPU maps 144 bytes of inputs and 144 bytes of outputs, covering 256 bits of digital I/O and 56 words of analog I/O per device. Program memory is 24 KB, with DDR-type RAM and flash for backup. The process-image update time on PROFINET IO can go as low as 4 ms, depending on the IO device count and configuration.

Communication and motion

PROFINET interface supports TCP/IP, autonegotiation, and autocrossing. The RS-485 port runs up to 187.5 kbps, shielded to 500 m. PROFIBUS DP is available via an add-on CM DP module. For motion, the CPU has 6 single-phase high-speed counters (4 at 200 kHz, 2 at 30 kHz) and 4 A/B-phase counters (2 at 100 kHz, 2 at 20 kHz), all parameterizable.

Control and isolation

Built-in PID control supports up to 8 loops with continuous or binary outputs and auto/manual mode. The CPU is transformer-isolated at 1,500 V AC. Digital input thresholds are split: I0.0–I0.3 switch below 1 V DC for signal 0 and above 4 V for signal 1; I0.4–I2.7 use < 5 V DC for 0 and > 15 V for 1.

Frequently asked questions

What programming languages does this CPU support?

It supports LAD, FBD, STL, and RAM programming.

What is the ambient temperature range?

Rated for -40 °C to 70 °C.

Does it have a real-time clock?

Yes, a hardware clock with no battery backup; it is maintenance-free and requires 7 days of power-on to retain time.

MPN
6ES7288-1ST40-0AA0