Siemens SIMATIC S7 - CPU ST40, CPU SR40, and CPU Cr40 S; General Specifications and Features

Technical specifications
A.2 S7-200 SMART CPUs
S7-200 SMART
704 System Manual, V2.3, 07/2017, A5E03822230-AF
A.2.3
CPU ST40, CPU SR40, and CPU CR40s
A.2.3.1
General specifications and features
General specifications and features of the CPU ST40, CPU SR40, and CPU CR40s
Table A- 38 General specifications
Technical data
CPU ST40 DC/DC/DC
CPU SR40 AC/DC/Relay
CPU CR40s AC/DC/Relay
Article number 6ES7288-1ST40-0AA0 6ES7288-1SR40-0AA0 6ES7288-1CR40-0AA1
Dimensions W x H x D
(mm)
125 x 100 x 81 125 x 100 x 81 125 x 100 x 81
Weight
410.3 grams
441.3 grams
475 grams
Power dissipation
18 W
23 W
8 W
Current available (EM
bus)
1400 mA max. (5 V DC) 1400 mA max. (5 V DC) Not available
Current available
(24 V DC)
300 mA max. (sensor power) 300 mA max. (sensor power) Not available
Digital input current
consumption (24 V DC)
4 mA/input used 4 mA/input used 4 mA/input used
Table A- 39 CPU features
Technical data
CPU ST40 DC/DC/DC
CPU SR40 AC/DC/Relay
CPU CR40s AC/DC/Relay
User
memory
Program
24 Kbytes
24 Kbytes
12 Kbytes
User data (V)
16 Kbytes
16 Kbytes
8 Kbytes
Retentive
10 Kbytes max.
1
10 Kbytes max.
1
2 Kbytes max.
1
On-board digital I/O
24 inputs/16 outputs
24 inputs/16 outputs
24 inputs/16 outputs
Process image 256 bits of inputs (I) / 256 bits
of outputs (Q)
256 bits of inputs (I) / 256 bits
of outputs (Q)
256 bits of inputs (I) / 256 bits
of outputs (Q)
Analog image 56 words of inputs (AI) / 56
words of outputs (AQ)
56 words of inputs (AI) / 56
words of outputs (AQ)
Not available
Bit memory (M)
256 bits
256 bits
256 bits
Temporary (local) memory
(L)
64 bytes in the main program
and 64 bytes in each subrou-
tine
and interrupt routine
60 bytes when programming
in
LAD or FBD (STEP 7-
Micro/WIN reserves 4 bytes)
64 bytes in the main program
and 64 bytes in each subrou-
tine
and interrupt routine
60 bytes when programming
in
LAD or FBD (STEP 7-
Micro/WIN reserves 4 bytes)
64 bytes in the main program
and 64 bytes in each subrou-
tine
and interrupt routine
60 bytes when programming
in
LAD or FBD (STEP 7-
Micro/WIN reserves 4 bytes)
Sequential control relays
(S)
256 bits 256 bits 256 bits