Simatic Step7-200 Modules S7-22x series

Expansion Modules (EM)
• Digital input modules:
- 24 VDC
- 120/230 VAC
• Digital output modules:
- 24 VDC
- Relay
• Analog input modules:
- Voltage
- Current
- Resistance
- Thermocouple
• Analog output modules:
- Voltage
- Current
CPUs of the S7-22x series (CPU 222/224/226) can only be expanded using
expansion modules of the S7-22x series. Note: Combined use of the S7-21x
series with the S7-22x series is NOT possible!

Communications Processors (CP)
On the S7-22x series you can use the CP 243-2 to connect the S7-200™ as master to an AS-Interface. The newer CP243-2 supports up to 62 AS-Interface
slaves being connected (max. 31 analog slaves). Up to three (CPU 224, CPU
226) CP243-2 processors can be operated simultaneously on these S7-200
CPUs.
The EM277 PROFIBUS-DP module allows connection of S7-22x series CPUs
(6ES7-22x-xxx21-xxxx and later) to PROFIBUS-DP (as a slave) and MPI.
Simultaneous operation is possible as a MPI slave and PROFIBUS-DP slave.
PROFIBUS-DP data transfer rates of up to 12 Mbits/second are supported.

Simatic Step7-200 CPU Design S7-21x Series

Mode Selector
For manual mode selection:
STOP = Stop mode, the program is not executed.
TERM = Program execution, read/write access possible from PG.
RUN = Program execution, read-only access possible from PG.

Status Indicators (LEDs)
SF = Group error; internal CPU fault; red
(LEDs) RUN = Run mode; green
STOP = Stop mode; yellow
DP = PROFIBUS-DP ( only CPU 215)

Memory Card
Slot for memory card. A memory card saves the program contents in the event
of a power outage without the need for a battery.

PPI Connection
The programming device, text display, or another CPU is connected here.