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MESSTEC Power Converter GmbH
Operating Manual
TEC Controller
Document: 10100920OM
Revision: 1.1
Date: 10.10.2019
Page 50/71
8.2.2. Outputs
Digital outputs are compatible to TTL and can be configured as
•
LOW active
•
HIGH active
The default setting is HIGH active.
Furthermore the output stage can be configured as
Totem Pole (push-pull)
Open Collector
The default setting is Totem Pole.
When set to Totem Pole, the output resistance is 330Ω.
When set to Open Collector, the output resistance is very low
(0,5 Ω). In this
case the output can sink up to 500 mA and is short circuit protected.
Note: Also in Open Collector configuration, the output voltage coming from
the external circuit, must not exceed 5 V.
Fig. 33: Digital output circuit