MESSTEC Power Converter GmbH
Operating Manual
TEC Controller
Document: 10100920OM
Revision: 1.1
Date: 10.10.2019
Page 10/71
closed loop temperature regulation is activated. With the input HW-RESET, internal error
states of the TEC-Controller can be cleared. This is not a reset line of the built in MCU
(Micro Controller Unit).
There are two digital outputs available: READY and STATUS. Both digital outputs can be
independently configured (PC-software) as low- or high-active, furthermore as totem-pole
or open-collector outputs (default settings: high-active and totem-pole). The digital output
READY indicates operational readiness (after power on). When internal errors are occu-
ring, the READY output will be deactivated. The digital output STATUS will be activated,
when the TEC-Controller is enabled and if the sensor temperature is /- 1 °C of the
setpoint value.
The serial interface is carried out by standard USB 2.0 Mini-B connector. TEC-Controllers
are available in two different hardware versions: with USB-Interface or with RS232 Inter-
face. Both interface types are operating with the Mini-B connector.
PCs with USB interface are connected via standard USB cable. PCs or arbitrary control-
lers with RS232 interface are connected through an adapter cable Mini-B / SubD9F. This
adapter cable has standard pinning on the SubD9F connector and is available on request
(see chapter 7.3.7).
The RS232 version has galvanically isolated interface hardware.
In any case, the serial protocol is identical. The protocol specification is available on re-
quest as a separate document.