Siemens Simatic S7 Series System Manual page 19

Table 1- 2 Compact non-expandable CPUs
Features
Dimensions: W x H x D (mm)
User memory Program
User data
Retentive
On-board digital I/O
•
•
Expansion modules
Signal board
High-speed counters
PID loops
Real-time clock with 7-day back-up
You can configure areas of V memory, M memory, C memory (current values), and portions of T memory (current val-
1
ues on retentive timers) to be retentive, up to the specified maximum amount.
Table 1- 3 Standard expandable CPUs
Features
Dimensions: W x H x D (mm)
User memory Program
User data
Retentive
On-board digital I/O •
•
Expansion modules
Signal board
High-speed counters
Pulse outputs
2
PID loops
Real-time clock with 7-day back-up
You can configure areas of V memory, M memory, C memory (current values), and portions of T memory (current val-
1
ues on retentive timers) to be retentive, up to the specified maximum amount.
The specified maximum pulse frequency is possible only for CPU models with transistor outputs. Pulse output operation
2
is not recommended for CPU models with relay outputs.
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
CPU CR40
125 x 100 x 81
12 Kbytes
8 Kbytes
10 Kbytes max.
Inputs 24 DI
•
Outputs 16 DQ Relay
•
None
None
4 at 100 K Hz single phase
or
2 at 50 K Hz A/B phase
8
No
CPU SR20, CPU
ST20
90 x 100 x 81
12 Kbytes
8 Kbytes
10 Kbytes max.
Inputs 12 DI
•
Outputs 8 DQ
•
6 max.
1
4 at 200 K Hz
single phase
or
2 at 100 K Hz A/B
phase
2 at 100 KHz
8
Yes
1
CPU SR30, CPU
ST30
110 x 100 x 81
18 Kbytes
12 Kbytes
10 Kbytes max.
1 1
18 DI
•
12 DQ
•
6 max.
1
4 at 200 K Hz sin-
gle phase
or
2 at 100 K Hz A/B
phase
3 at 100 K Hz
8
Yes
Product overview
1.1 S7-200 SMART CPU
CPU CR60
175 x 100 x 81
12 Kbytes
8 Kbytes
10 Kbytes max.
1
36 DI
24 DQ Relay
None
None
4 at 100 K Hz single phase
or
2 at 50 K Hz A/B phase
8
No
CPU SR40, CPU CPU SR60, CPU
ST40 ST60
125 x 100 x 81 175 x 100 x 81
24 Kbytes 30 Kbytes
16 Kbytes 20 Kbytes
10 Kbytes max. 10 Kbytes max.
1
24 DI 36 DI
• •
16 DQ 24 DQ
• •
6 max. 6 max.
1 1
4 at 200 K Hz sin- 4 at 200 K Hz sin-
gle phase gle phase
or or
2 at 100 K Hz A/B 2 at 100 K Hz A/B
phase phase
3 at 100 KHz 3 at 100 KHz
8 8
Yes Yes
1
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