User Manual

2.3.5 Power Output
The power output provides a PWM signal to feed the Peltier modules. The polarity will be automatically
switched, it is possible to heat and to cool.
Output voltage depending on the supply voltage, typically value of supply voltage minus 0.5 …
1.0 V
Output current 12 A max.
PWM frequency around 2 kHz
Overload protection Over current limitation
Connecting cable recommended cross section 0.75 …2.5 mm2 depending on the Peltier current
and lead length
The wiring marking „output +“ and „output –„ refers to the polarity of the output voltage when cooling !
Attention must be paid to the correct polarity. If the Peltier Module is cooling while it should heating (or in-
verse) you need to change the polarity of the supply.
Regarding the EMV compatibility (radiation influence) it is recommended to use twisted leads, especially in
case of long lead length.
2.3.6 Power Supply
Voltage supply 11… 28 V Direct Current
Current consumption ca. 300 mA plus Ouput current and losses 12.5 A max.
Protection internal melting fuse 12.5 A fast
(may only be replaced by the manufacturer – the warranty is cancelled after
opening of the case)
Supply cable recommended cross section 0.75… 2.5 mm2 depending on the Peltier current
and lead length
Regarding the EMV compatibility (radiation influence) it is recommended to use twisted leads, especially in
case of long lead length.
.
2.3.7 Serial Interface according to RS232C
The optional interface supports a simple report with software handshake, that is there are only existing the
signals RXD and TXD.
The interface will be used for factory internal adjustments and diagnostics.
It can be used by the customers for remote control e.g. by a superior microprocessor
In addition it can be used for programming the curve of the customized sensor. In this case CoolTronic can not
warrant for correct function of the device and the resulting accuracy.
The interface has the following data configuration
Data configuration 8 Data-, 2 Stop-Bits
Parity none
Baudrate 9600 Baud
The interface signals are conducted to the connector link (DSUB9, bushing)
Pin assignment 2 RXD
3 TXD
5 GND
To connect TC2812 and the PC a standard 1:1 linked interface cable with 9-pol D-SUB-connector and 9-pol D-
SUB bushing has to be used.
CoolTronic GmbH Operation Manual Peltier Controller TC2812 Page 6 / 16
Revision: 1.15, Date: 30. Januar 2008 20080130_TC2812_MAN_E