Specifications

S7-200 Programmable Controller System Manual
462
Optional Cartridges
Cartridge Description Order Number
Memory cartridge Memory cartridge, 64K (user program, recipe, and data l ogging) 6ES7 291--8GF23-- 0XA0
Memory cartridge Memory cartridge, 256K (user program, recipe, and data l ogging) 6ES7 291--8GH23-- 0XA0
Real-Time Clock with battery Clock cartridge accuracy:
2 minutes /month at 25°C,
7 minutes /month at 0°Cto55°C
6ES7 297 --1AA23 --0XA0
Battery cartridge Battery c artridge (data retention tim e): 200 days typical 6ES7 291--8BA20 --0XA0
General Features Dimensions
Battery
Size
Type
3 V, 30 mA hour, Renata CR 1025
9.9 mm x 2.5 mm
Lithium < 0.6 g
18 mm
18 mm
10 mm
Memory Cartridge
There are restrictions for using memory cartridges between CPUs of a different model. Memory
cartridges programmed in a particular model number CPU can be read by CPUs with the same or
higher model number as shown in Table A-65:
Table A-65 Memory Cartridge Model Number Read Restrictions
Memory Cartridge programmed in a ... Can Be Read By A ...
CPU 221 CPU 221, CPU 222, CPU 224, CPU 224XP and CPU 226
CPU 222 CPU 222, CPU 224, CPU 224XP and CPU 226
CPU 224 CPU 224, CPU 224XP and CPU 226
CPU 224XP CPU 224XP and CPU 226
CPU 226 CPU 226
The 64K and 256K memory cartridges are designed to work only with the new CPUs that have the
order number as shown here: 6ES7 21x--xx23--0XB0. Each “x” means that this digit is a don’t
care.
You may have user programs stored on 32K memory cartridges originally programmed by older
CPUs (version “20”, “21”, or “22”). These cartridges can be read by the new CPUs, subject to the
model number restrictions in Table A-65.
Real Time Clock Cartridge
The Real Time Clock cartridge (6ES7 297--1AA23--0XA0) is designed to work only with the “23”
CPUs. The earlier version of the Real Time Clock cartridge (6ES7 297--1AA20--0XA0) is not
physically or electrically compatible with the “23” CPUs.