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Siemens 6ES7288-1ST20-0AA0 — DIN Rail Power Supplies

Siemens 6ES7288-1ST20-0AA0 S7-1200 CPU, -40 to 70°C, FBD/LAD

MPN6ES7288-1ST20-0AA0

Siemens S7-1200 CPU, 6ES7288-1ST20-0AA0, FBD/LAD/STL programming, 12 kB program memory, -40 to 70 °C, DIN rail, PROFINET, RS485, PID control, high-speed counters.

$136.00 – $171.45Ref. price · indicative, final on quote

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Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

6ES7288-1ST20-0AA0 key specifications
Parameter	Value
Type	Hardware clock, no battery backup
Interface	RS 485 (max. 187.5 kbps)
Type of memory	DDR
Type of input voltage	DC
Test voltage at air discharge	8 kV
Test voltage at contact discharge	4 kV
Current output, max.	300 mA; 24 V DC Sensor Power
Inrush current, max.	11.7 A; at 28.8 V
Short-circuit protection	No
Current consumption, max.	720 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

6ES7288-1ST20-0AA0 additional specifications
Parameter	Value
For signal "0", max. (Permissible quiescent current)	1 mA
Power loss, max.	20 W
IP degree of protection	IP20
S7 communication	Yes
PROFINET IO device	Yes; I-Device since V2.5
PROFINET IO controller	Yes; Since V2.4
Number of RS 485 interfaces	1
Supports protocol for PROFINET IO	Yes; RT Controller (since FW V2.4) & I-Device (since FW V2.5)
Number of industrial ethernet interfaces	1
Rail mounting	Yes; 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
Depth	81 mm
Width	90 mm
Height	100 mm
Weight, approx.	320 g
Fall height, max.	0.3 m; five times, in product package
CE mark	Yes
FBD	Yes
LAD	Yes
RAM	Yes
STL	Yes
Max.	70 °C
Min.	-40 °C
Flash	Yes
Inputs	144 byte; 256 bit of digital inputs & 56 words of analog inputs
RS 485	Yes
TCP (IP)	Yes
Forcing	Yes
Outputs	144 byte; 256 bit of digital outputs & 56 words of analog outputs
Present	Yes; Maintenance free, RTC requires 7 days.
Isolated	Yes; Transformer isolated, 1,500V AC
PROFIBUS	Yes; Via CM DP module
As client	Yes
As server	Yes
Supported	Yes
Backup time	7 d
Memory size	12 kbyte; Program memory
Autocrossing	Yes
Inputs, max.	128 byte; Per device
Outputs, max.	128 byte; Per device
Updating time	4 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 controller	Yes; PID closed-loop control function: Continuous controller outputs, binary controller outputs, automatic/manual mode, max. 8 loops
Shielded, max.	500 m
Autonegotiation	Yes
Parameterizable	Yes; 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 value	24 V
Unshielded, max.	150 m
Micro memory card	Yes; microSDHC Card (optional)
Number of counters	6
On lamp load, max.	5 W
At "0" to "1", max.	12.8 ms
At "0" to "1", min.	0.2 ms
Programming package	STEP 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 outputs	3
Number of relay outputs	0
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 inputs	12
For word operations, typ.	1.2 µs; / instruction
Number of digital outputs	8; Transistor
With resistive load, max.	0.5 A
For signal "1" rated value	0.5 A
Hardware clock (real-time)	Yes
Of which High-Speed outputs	3; 100 kHz Pulse Train Output
Memory available for user data	8 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 limit	20.4 V
Permissible range, upper limit	28.8 V
Number of connectable IO devices, max.	8
Automatic detection of transmission rate	Yes; 10/100 Mbit/s
Limit class a, for use in industrial areas	Yes; 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

Product details

CPU core and programming

The Siemens 6ES7288-1ST20-0AA0 is an S7-1200 CPU supporting FBD, LAD, and STL programming languages, with 12 kB program memory and DDR RAM. It handles 144 bytes each of digital and analog I/O, mapped as 256 bits of digital inputs/outputs and 56 words of analog inputs/outputs. The CPU includes a maintenance-free real-time clock with 7-day backup, no battery required.

Communications and integration

Built-in PROFINET interface with TCP/IP support and autonegotiation; update time as low as 4 ms. RS485 port runs at up to 187.5 kbps. PROFIBUS connectivity is available via a CM DP module. The CPU can act as both PROFINET client and server. Mounts on standard DIN rail — snap-on to a 35 mm rail, 90 mm wide by 100 mm tall by 81 mm deep.

Control and I/O features

Built-in PID closed-loop control supports up to 8 loops with continuous or binary outputs, automatic/manual mode. Six high-speed counters are parameterizable: four single-phase HSCs at 200 kHz, two at 30 kHz; four A/B-phase HSCs at 100 kHz, two at 20 kHz. Input thresholds are configurable: signals below 1 V DC (I0.0–I0.3) or 5 V DC (I0.4–I2.7) read as logic 0; above 4 V or 15 V respectively read as logic 1. Forcing and autocrossing are supported.