User Manual

2.3.3 Auxiliary Output
The instrument has a digital output which serves the signalization of the process status. According to the
configuration the output becomes active at:
- “OK”-function, the target temperature is balanced, that is within the selceted temperature tolerance
range
- “Alarm“-function, the temperature strongly deviates, that is outside of the selected temperature Alarm
range
Applicable voltage max. 30V
Output current max. 100 mA
Overload protection limited protection against voltage pikes
Type NPN-Transistor
Minimum Voltage < 2V in switched-state
As an example of the application the following diagram shows the connection to the SPS input. Lower than 2
Volt at the SPS-input corresponds to the activated auxiliary output.
Wiring of a SPS to the auxuliary output (LOW-active)
The following diagram shows the wiring to the input of a SPS. Higher than > 22 V at the SPS input corresponds
to the activated auxiliary output.
Wiring of a SPS to the auxiliary output (HIGH-active)
Auxiliary Input
The instrument has a digital input, which the power output can be optionally switched on or switched off.
According to the configuration is:
- “OFF”-function, in case of activated input the power output is off
(this option is set as default in order to have the instrument functional without connection at the auxiliary
input)
- “ON”-function, only at activated input the power output is on
Maximum input voltage 30V
Input resistance approx. 1KOhm
Voltage for „ON“ > 5V
Voltage for “OFF” < 1V
CoolTronic GmbH Operation Manual Peltier Controller TC2812 Page 4 / 16
Revision: 1.15, Date: 30. Januar 2008 20080130_TC2812_MAN_E