S+S REGELTECHNIK THERMASREG FS Bedienungs- Und Montageanleitung Seite 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.
DIP SWITCHES
FS 1 ⁄ 2
FS 3 ⁄ 4
LED INDICATION
FS 1 ⁄ 2
FUNCTION:
Inside the capillary of the frost protection monitor, a pressure signal is generated by the filling employed, which is proportional to the lowest tempera-
ture over the entire capillary length (minimum however over 200 mm). A pressure sensor converts this pressure signal into an electric signal, ampli-
fied by electronics. The standard signal 0...10 V equivalent to 0...15 °C thereby generated is output. This voltage is available at the terminal marked
"Temp.". In addition, a switchpoint for the potential-free changeover contact can be preset at a 270-degree adjusting screw, ranging from 0 °C (left
stop) to 15 °C (right stop). When temperature falls below that switchpoint "FS", the relay output switches to position "frost protection" (contact "W"
connected to contact "A"). When temperature rises by more than 2 K above the preset switchpoint "FS" and "automatic" operating mode is selected,
the system changes back to normal operating mode. The relay drops back to initial position (contact "W" connected to contact "B"). When operating
mode "manual" is selected and switchpoint "FS" +2 K is exceeded, the relay output does not automatically switch back, but has to be reset manually by
pressing the "Reset" button or by separating the device from supply voltage.
Additionally, a second voltage output "AV" is available, represented by 0...10 V. At a voltage of 0 V at the control input "ST-E", output voltage "AV" is al-
ways then 0 V, when the measured temperature is at least 6 K above the preset switchpoint "FS". When the temperature measured falls below the
preset switchpoint "FS"+6 K, voltage output "AV" rises linear from 0 V to 10 V. The increase here amounts to 1.67 V per Kelvin of approach to the pre-
set switchpoint "FS". Therefore output voltage 10 V is output when "FS" = temperature measured. When control input "ST-E" is increased, output
voltage "AV" is also increased by that amount. So output "AV" represents a summation output for the input variables "ST-E" and "frost signal". Here, the
variable "frost signal" describes the output behaviour of "AV" at "ST-E" = 0 V. max. 6 output voltage is limited to 10 V.
In case of capillary breakage or electrical damage to the system, the relay output is automatically switched to "frost protection" (contact "W" con-
nected to contact "A").
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.
SAFETY 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 „A" with contact „W" = 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 reset
Automatic
LED indication of ACTUAL temperature respectively switching threshold in °C
(Depending on temperature measuring range selected via DIP 2)
LED LED
Measuring
range 1
0 ...+15 °C 0 +1.5
measured
Minimum temp.
12°C
12°C
8°C
8°C
8°C
Mounting
diagram
Temperature Range
DIP 1
(selectable)
ON
(not assigned)
OFF 0 ...+15 °C
LED LED LED
2 3 4 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 Output voltage
„ST-E"
0 V
5 V
0 V
5 V
8 V
FS
DIP 2
ON
OFF
LED LED
10 11
+13.5 +15.0
„AV"
0 V
5 V
5 V
10 V
10 V *