S+S Regeltechnik THERMASREG FS Notice D'instruction page 7

G
Mounting and Installation
NOTES REGARDING
– Please ensure that the minimum temperature at the capillary
does not develop at the device's enclosure or at the sensors
(installed inside the enclosure).
– The limit value must actually be exceeded over more than
20 cm of the length of the capillary. This necessary minimum
length of 20 cm may subdivide into several sections.
– The capillary must not be bent or buckled several times.
This could cause leakage and the system's failure to function.
– The voltage output is short-circuit proof.
– Applying overvoltage will destroy the device.
– If this device is operated beyond the specified range,
all warranty claims are forfeited.
To set the switching threshold, press and hold the RESET button
and set using the potentiometer (shown on the LED display).
DIP SWITCHES
FS
LED INDICATION
FS
FUNCTION
The filling used in the copper capillary tube in the frost protection monitor generates a pressure signal that is proportional to the lowest temperature on
the entire capillary tube (but min. 200 mm). This is converted into an electrical signal by a sensor and electronically amplified. The standard signal 0-10 V
generated as a result corresponding to 0...+15°C is issued. This voltage is available at the "Temp." terminal. In addition, a 270° control knob can be used to
specify a switchpoint for the potential-free changeover contact in the range from 0 °C (left limit stop) to +15 °C (right limit stop). If this switchpoint "FS" is
undershot, the relay output switches to the "Frost protection" position (contact "W"= COM connected to contact "Ö"= NC). If the temperature rises by more
than 2 K above the set switchpoint "FS", the device switches back to normal operating mode if "automatic mode" is selected. The relay drops out to the initial
position (contact "W"= COM connected to contact "S"= NO).
If the "manual operation" operating mode was selected, the relay output does not automatically switch even if the set switchpoint "FS" +2 K is exceeded, but
must be manually reset using the "Reset" button or by disconnecting the device from the operating voltage.
In addition, a second voltage output "AV", mapped by 0 -10 V, is available. At a voltage of 0 V at the control input "ST-E", the output voltage "AV" is always 0 V if
the measured temperature is at least 6 K above the set switchpoint "FS". If the measured temperature falls below the set switchpoint "FS"+6 K, the voltage
output "AV" increases in a linear fashion from 0 V to 10 V. The increase here amounts to 1.67 V for every degree Kelvin by which the temperature approaches
the preset switchpoint "FS". The output voltage 10 V is therefore issued at "FS" = measured temperature. If you increase "ST-E", the output voltage "AV" is
increased by this amount. The "AV" output therefore represents a summation output for the input variables "ST-E" and "Frost signal". In this case, the "Frost
signal" variable describes the output behaviour of "AV" at "ST-E" = 0 V. The maximum output voltage is restricted to 10 V.
In case of capillary breakage or electrical damage to the device, the relay output automatically switches to "Frost protection" (contact "W"= COM connected
to contact "Ö"= NC).
NOTE
The capillary tube must be securely seated in the socked and must not twist.
A redundant setup to protect critical systems is absolutely necessary !
Selected examples:
Preset
threshold „FS"
5°C
5°C
5°C
5°C
5°C
* : Calculative, an output voltage of 13 V is generated, which is limited by electronics to 10 V.
SAFET Y SWITCHING:
In case of power failure of operating voltage and/or in case of capillary breakage, the relay output witches to position „frost protection"
(contact "Ö"= NC with contact "W"= COM = currentless condition).
When device inside temperature drops below + 10 °C, the heating output is activated (heating element to be ordered separately).
Reset after frost protection
(selectable)
manual
automatic
LED indication
of ACTUAL temperature respectively switching threshold in °C
LED
Measuring
range 1
0...+15 °C 0
measured
Minimum temp.
12°C
12°C
8°C
8°C
8°C
Mounting
diagram
DIP
1
ON
OFF
LED LED LED LED
2 3 4 5
+1.5 +3.0 +4.5 +6.0
Output
„Temp."
8 V
8 V
5.33 V
5.33 V
5.33 V
LED LED LED LED
6 7 8 9
+7.5 +9.0 +10.5 +12.0
Control voltage
„ST-E"
0 V
5 V
0 V
5 V
8 V
Rev. 2018 - V30 GB
FS
LED LED
10 11
+13.5 +15.0
Output voltage
„AV"
0 V
5 V
5 V
10 V
10 V *