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CTI 2500 Installation and Operation Guide V2.8
109
APPENDIX G. – SD CARD REQUIREMENTS
CTI 2500 Series Classic Controller SD Card Requirements
The CTI 2500 Series Classic controller (2500-Cxxx) supports full size standard
capacity and high capacity (SDHC) cards. Standard Capacity full size cards are
marked with the SD logo.
High Capacity full size cards SDHC logo. CTI recommends that you use an
SDHC card, which is the newer design. SDXC and SDIO cards are not
supported.
NOTE:
Support for SDHC cards was added in firmware version 6.18 (12/21/2011). Prior firmware versions
supported only standard capacity SD cards.
CTI 2500 Series Compact Controller SD Card Requirements
The CTI 2500 Series Compact controller (2500C-Cxx) supports micro SDHC
cards. Micro SDXC and micro SDIO cards are not supported.
Data Storage Capacity
SDHC and micro SDHC cards range in capacity from 4GB to 32GB (where GB represents
gigabytes). The smallest capacity (4GB) is more than adequate for use with the 2500 series
controller. However, you can use SDHC cards with a larger capacity, if you wish.
If you must use a standard capacity card, choose one with a capacity of 256MB- 1GB.
Smaller capacity cards were produced before the specification was mature.
Physical Size
There are three sizes of SD cards: standard, mini, and micro. The SD card receptacle on the
2500 Series Classic controller (2500-Cxxx) is designed for a standard size card, which is the
largest form factor. A passive adapter can be used to accommodate the smaller mini or
micro sizes, if necessary. The SD card receptacle on the 2500 Series Compact controller
(2500C-Cxxx) is designed for the micro SD size.
Speed
Modern SD cards indicate the access speed by a class rating, which indicates the minimum
continuous write speed in MB/sec. For example, a class rating of indicates an access
speed of 4 MB/sec. For firmware update, the speed of the card is not important, although it
will have some small effect on the time to transfer the update file to the controller.
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