Siemens Simatic S7 Series

Technical specifications
A.2 S7-200 SMART CPUs
S7-200 SMART
584 System Manual, 09/2015, A5E03822230-AC
A.2.3
CPU ST40, CPU SR40, and CPU CR40
A.2.3.1
General specifications and features
General specifications and features of the CPU ST40, CPU SR40, and CPU CR40
Table A- 34 General specifications
Technical data
CPU ST40
DC/DC/DC
CPU SR40
AC/DC/Relay
CPU CR40
AC/DC/Relay
Article number
6ES7 288-1ST40-0AA0
6ES7 288-1SR40-0AA0
6ES7 288-1CR40-0AA0
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
440 grams
Power dissipation 18 W 23 W 18 W
Current available (EM bus)
1440 mA max. (5 V DC)
1440 mA max. (5 V DC)
--
Current available (24 V DC) 300 mA max. (sensor pow-
er)
300 mA max. (sensor pow-
er)
300 mA max. (sensor pow-
er)
Digital input current consumption
(24 V DC)
4 mA/input used 4 mA/input used 4 mA/input used
Table A- 35 CPU features
Technical data
Description
CPU ST40 DC/DC/DC,
CPU SR40 AC/DC/Relay
CPU CR40 AC/DC/Relay
User memory
Program
24 Kbytes
12 Kbytes
User data
(V)
16 Kbytes 8 Kbytes
Retentive
10 Kbytes max.
1
10 Kbytes max.
1
On-board digital I/O
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)
Analog image 56 words of inputs (AI) / 56 words of
outputs (AQ)
--
Bit memory (M)
256 bits
256 bits
Temporary (local) memory (L) 64 bytes in the main program and
64 bytes in each subroutine and interrupt
routine
64 bytes in the main program and 64 bytes
in each subroutine and interrupt routine
Sequential control relays (S) 256 bits 256 bits
Expansion modules expansion
6 max.
--
Signal board expansion 1 max. --
High-speed counters 4 total
• 4 at 200 KHz single phase
• 2 at 100 KHz A/B phase
4 total
• 4 at 100 KHz single phase
• 2 at 50 KHz A/B phase