User manual

Normal operation mode
In normal operation mode two conditions are continuosly checked:
– does the temperature on sensor 1 exceed the preset limit
– does the difference of the temperatures on both sensors exceed the
preset limit (sensor 1 needs to be warmer than sensor 2)
If both conditions are met, the relay output is activated
Temperature limit on Sensor 1
The upper dial is used to set a temperature limit from 0...100°C for
minimum temperature on Sensor 1. In normal mode it can be seen thru
LED status if the condition is met or not
mimimum temperature on Sensor 1 yellow LED activity
temperature does not exceed limit led blinking
temperature does exceed limit led off
Temperature difference between Sensor 1 / 2
The lower dial is used to set a minimum limit for the temperature
difference between both sensors in 0...20° range. In normal operation
mode the LED status will show if the condition is met or not
temperature difference T1-T2 red LED activity
difference smaller than preset limit red LED blinking
difference is greater than preset limit red LED off, yellow blinking
OR
red LED on, yellow LED off,
relay active
Deactivation of condition checking
For both conditions to be checked it is possible to deactivate the limit
checking by setting the dial all the way to the left (0°C position).
In this case the limit is not set ot 0°C but this condition considered true
without checking the sensor readings
If both knobs are set to the left limit, both conditions are considered true
without reading the sensors and the relay will be activated
Assembly and mounting instructions
Assembly of the rotary knobs on the module
To to install the rotary knobs on the module with correct orientation of the
arrows it is recommended to first turn both potentiometers all the way to
the left firstly, removing the knobs again and re-insert with arrow pointing
at 'zero' position as shown on the printed front panel.
The differential temperature control module is designed to fit perfectly into
the TowiTek modular casing available with order number 19 12 92.
A printed and cut to shape front panel to fit on the case is supplied with
this product.
Picture with optional modular case order code 19 12 92
For use of this module with the modular casing a special knob to fit on the
switch plunger is included with this product.
The modular casing grants the touch safe enclosure which is required if
the module is to be used with mains current.
The modular casing comes with mounting clips to attach the case on
standardized DIN-mounting rails with 30 mm width.
The connection to the sensors can be extended as needed but the
maximum cable length should not exceed 15 meters for reliable operation.
The input terminals for the temperature sensors must not be
connected with any other voltage source!
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19 12 53 ENG - REV 1.00 / 06.07
EU-Declaration of conformity
The company
TowiTek GmbH
Helenenstr. 21a
81825 München
declairs in solely own responsibility that the product
Differential temperatur control module 19 12 53
complies to the standards
EN 55022 (EMV emission)
EN 61000-6-1 (EMV tolerance)
The above named company keeps records
with confirm the compliance to the standards
Tobias Wieler Munich, 11
th
of May 2007