Siemens SIMATIC PANEL PC 877 - Manual (Page 124)

Maintenance and service
12.4 Installing and removing hardware components
SIMATIC Panel PC 877
12-10
Operating instructions, Release 07/2006, A5E00877780-01
12.4.3 Installing and removing memory modules
Memory expansion
The motherboard is equipped with 2 slots for memory modules. 184 pin DDR266 or PC2700
memory modules can be used, unbuffered, no ECC. This enables you to expand the
memory capacity of the device to a maximum of 2 GB. These slots can be fitted with one or
two memory modules.
Combination Slot X3 Slot X4 Maximum expansion
1 256/512 MB/1 GB 1 GB
2 256/512 MB/1 GB 256/512 MB/1 GB 2 GB
Note
Any module can be plugged into any slot.
Preparation
Disconnect the device from mains and unplug all cables.
Caution
The electronic components on the PCBS are highly sensitive to electrostatic discharge. It is
therefore vital to take precautionary measures when handling these components. Refer to
the directives for handling electrostatic sensitive components. For more information, please
refer to the section "ESD directives".