
MorphoAccess® SIGMA Series - Administrator Guide
Recommendations
2017_2000025464-v03
This document and the information therein are the property of Morpho. They must not
be copied or communicated to a third party without the prior authorization of Morpho
491
July 17
SD card
Feature/Function name
SIGMA Series
SIGMA Extreme
Series
SIGMA Lite Series
SD card support
✔
✖
Even if the SD card is provided with the terminal, the administrator is advised to use
branded ones such as Verbatim.
Use the class card, having type 10 for better performances.
Do not switch SD card from one terminal to another.
Ethernet connection
It is recommended to use a category 5 shielding cable (120 Ohms). It is also strongly
recommended to insert a repeater unit every 90m.
Extreme care must be taken while connecting Ethernet wire to the MorphoAccess® SIGMA
Family terminal block board since low quality connection may strongly impact Ethernet signal
sensibility.
It is recommended to connect Rx+ and Rx- with the same twisted-pair wire (and to do the same
with Tx+/Tx- and the other twisted-pair wire).
Date / Time synchronization
The terminal clock typically has a +/- 4 sec time deviation, per day at +25°C.
At 50°C, the time deviation may be up to +/- 8 sec per day.
For features requiring time precision (such as SSL protocol or DESFire® contactless card), the
internal clock/calendar of the MorphoAccess® SIGMA Family terminal must be synchronized
regularly with an external terminal (using the appropriated ILV command)
WARNING: Time deviation is a function of temperature and must be taken care of.
Cleaning precautions
A dry cloth should be used to clean the terminal, especially the biometric sensor.
The use of acid liquids, alcohol or abrasive materials is prohibited.