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MESSTEC Power Converter GmbH
Operating Manual
TEC Controller
Document: 10100920OM
Revision: 1.1
Date: 10.10.2019
Page 29/71
6.1.3. Safe-State during configuration of digital Inputs/Outputs
The Safe-State is indicated by simultaneously and periodically blinking of
three LEDs:
RED
YELLOW
GREEN
The Safe-State can be left only by switching off the power supply of the
TEC-Controller.
6.2. Indication of serial data transfer
Fig. 19: Serial data transfer indicator LEDs
During serial data transfer (USB or RS232) to PC or external controller, these LEDs
are flashing accordingly.
RXD flashing:
data is being received
TXD flashing:
data is being transmitted
While connected to the PC-Software, both LEDs are flashing periodically.