Datasheet

HMC-SD291/491
2
General Specifications
* These values depend on the device on which the card is mounted. The value in the user's manual for the device takes priority if it is written.
Write Protection
You will not be able to write to the SD Memory Card if the key is set to the LOCK position. (Use this setting to prevent overwriting.)
Detecting SD Memory Card Life Expiration
You can detect the remaining life of the SD Memory Card used in a NJ-series Controller.
The remaining life can be notified with the following functions.
• System-defined variable _Card1Deteriorated (SD Memory Card Life Warning Flag)
• SD Memory Card Life Exceeded (Observation) event
For details, refer to the NJ-series CPU Unit Hardware User's Manual (Cat. No. W500).
Precautions for Correct Use
Read the following precautions carefully before using an SD Memory Card. For details, refer to user's manuals for the device on which the card is
mounted.
Formatting
The SD Memory Cards are formatted and shipped, so you do not need to format the card by yourself after purchasing.
To format the SD Memory Card after using, perform the formatting operation on the device on which the card is usually mounted.
Service Life
The SD Memory Card uses flash memory, and so its service life is limited. When the end of the SD Memory Card's service life approaches, the
ability to write data is lost, and data is sometimes not retained after writing. The service life depends on the size of the data that is written and on
the ambient temperature. For the unlikely event that data is lost, it is recommended to periodically back up data.
Installing and Removing
To install and remove the SD Memory Card, follow the user's manuals for the device on which the card is mounted.
Never remove the SD Memory Card while it is accessed. Otherwise the data may not be written correctly, or at worst, the card may no longer be
usable.
Item Specificatons
Common
specifications
Capacity 2GB 4GB
Dimensions 32mm × 24mm × 2.1mm (H × W × D)
Weight 2g max
Current consumption 200mA(3.3V) max *
Operating/storage environment
Ambient operating temperature: 0°C to 70°C /
Ambient operating humidity: 10% to 90% (no condensation) *
Ambient storage temperature: -20°C to 75°C /
Ambient storage humidity: 10% to 90% (no condensation)
Write protection Provided
Factory default
specification
Type of file system FAT16 FAT32