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<nowiki>**</nowiki>Used with Thermoking freezers.
<nowiki>**</nowiki>Used with Thermoking freezers.
== RS-232 Interface ==
RS-232 supports full-duplex communication which means the data can be both sent and received at the same time as they use separate transmission lines. Most of the modes are the same as for [[FMB640]]. When entering Sleep or Deep sleep RS-232 will be powered off. [[FMB640]] RS-232 connection diagram is shown in the figure below:
[[File:FMX640 and RS232 illustration v1.2.png|frameless|906x906px]]
==Installation guide==
==Installation guide==
main menu.
main menu.
==Configuration==
==Configuration==
