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Electronic Temperature Switch
ETS 300
User manual
Date of issue: 03.12.2001
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1. Functions of the ETS 300
The ETS 300 is available with a built-in and with a separate temperature sensor. Depending
on the model, the unit offers the following functions:
· Display of the actual temperature, maximum value or a switching point.
· Switching the switching outputs according to the temperature and the pre-set switching
parameters.
· Analogue output
· Menu for basic settings (adapting the ETS 300 to the particular application)
· Two different types of programming enable
Four different output models are available: with one switching point, with two switching points
and both models can also have an additional analogue output signal 4 .. 20 mA.
2. Mounting
The ETS 300 with built-in sensor can be mounted directly onto a hydraulic block via the male
thread (G1/2 A, DIN 3852). The temperature sensor is built into the stem which is located
before the thread. In order for temperature to be measured correctly, please ensure that this
stem is in the fluid.
The ETS 300 with separate sensor is mounted to the wall by means of a clamp which is
available as an accessory (see Point 12.2 "Accessories - for mechanical connection").
The electrical connection must be carried out by a qualified electrician according to the
relevant regulations of the country concerned (VDE 0100 in Germany). The temperature
switch housing must be earthed correctly. When fitted into a hydraulic block it is sufficient if
the block is earthed via the hydraulic system. In the case of wall-mounting, the housing
must be earthed separately.
Additional assembly notes which, from experience, reduce the effect of electromagnetic
interference:
· Make line connections as short as possible.
· Direct proximity to connecting lines of user units or electrical or electronic units causing
interference must be avoided as far as possible.
3. Operating keys on the membrane keypad
HYDAC ETS 300
3-digit
digital display
SP1 SP2
mode
keys for setting switching
points, switch-back points and
additional functions
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4. Digital display
After switching on the supply voltage, the unit briefly displays “ETS” and then displays the
actual temperature.
2 s
In the basic settings the display can be altered. For example, the maximum value can be
permanently displayed. This is the highest temperature which has been recorded since the
unit was switched on or was last re-set. A switching point can likewise be permanently
displayed or the display can be set to be dark.
Depending on the setting, "TOP", "S.P. 1", "S.P. 2" or "OFF" appears briefly on the display
following the switch-on message.
The actual temperature can be displayed briefly by pressing the or the key. This
causes the maximum value to be re-set.
Notes:
· If the actual temperature exceeds the nominal temperature of the unit, it can no longer be
displayed and the display begins to flash.
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5. Output function
5.1 Switching outputs
The ETS 300 has 1 or 2 switching outputs. The following settings can be made under the
basic setting:
5.1.1 Switching point setting (SP)
One switching point and one hysteresis can be set for each switching output. The respective
output switches when the pre-set switching point is reached and switches back when the
temperature falls below the switch-back point. The switch-back point is determined by the
pre-set hysteresis (switch-back point = switching point minus hysteresis).
Abbreviations: "S.P.1", "S.P.2" = switching point 1 or 2
"hY.1", "hY.2" = hysteresis 1 or 2
5.1.2 Window function setting (WIN)
The window function enables a range to be monitored. For each switching output, an upper
and a lower switching value can be input which determine the range.
The respective output switches when the temperature enters this range. Upon leaving the
range, i.e. when the switch-back value has been reached, the output switches back. The
lower switch-back value is just below the lower switching value (Lo. minus three times the
increment (see table under point 5.4)). The upper switch-back value is just above the
upper switching value (Hi plus three times the increment). The area between switching and
switch-back value forms a safety zone which prevents unwanted switching operations from
occurring (e.g. during very slow rise in temperature).
Example for switching output 1 (normally open function):
°C / °F
hi.1 plus 3xincrement
hi.1
On
Lo.1
Lo.1 minus 3xincrement
Off
Safety zone
Safety zone
On
Off
Switch-back value
Switching value
Switching value
Switch-back value
t
ON
Off
Abbreviations: "hi.1", "hi.2"= High level 1 or 2 = upper switching value 1 or 2
"Lo.1", "Lo.2"= Low level 1 or 2 = lower switching value 1 or 2
Note: The window function only operates correctly (switching on and off), when all switching
values (including the safety zone) are greater than 0 °C, and lower than the nominal
temperature range.
5.2 Analogue output
Depending on the model, the ETS 300 has one analogue output with a 4...20 mA signal.
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5.3. Setting the switching points, hystereses and/or critical values for the window
function
· Press "mode" key
· "S.P.1" or "hi.1" is displayed
· Keep pressing the "mode" key until the required parameter is displayed (depending on
the basic setting: "S.P.1", "hY.1", "S.P.2", "hY.2", "hi.1", "Lo.1", "hi.2" or "Lo.2").
· After 2 seconds the actual setting flashes.
· Use the or the keys to alter the setting.
· Use the "mode" key to call up other parameters, if required, and alter the setting using
the
and the keys.
· If no keys are pressed for 3 seconds, the display changes back and the settings are
saved.
H
mode
2 s
press “mode” key until display
the required parameter
is reached.
Notes:
· If "LOC" appears in the display when trying to alter the settings, programming is disabled.
Action: set programming enable to "ON"
(see point 7 "Programming enable")
· If the or the key is held down during alteration, the value automatically advances.
· If a setting has been altered, "PRG" appears briefly in the display when the display is
switched over. The new setting is then saved in the unit.
5.4 Setting ranges of the switching points, hystereses and/or critical values
set switching point
= decrease value
= increase value
mode
temperature
display
3 s
G
Version Measurement
range
Built-in
sensor
-25 .. 100 °C
(-13 .. 212 °F)
Switching point
and/or
upper critical value
-23.5 .. 100 °C
(-10 .. 212 °F)
Hysteresis and/or
lower critical value
0.5 .. 123 °C
(1 .. 223 °F)
Increment *
0.5 °C
(1 °F)
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Separate
sensor
* All ranges given in the table are adjustable by the increments shown.
- 30 .. 150 °C
(-22 .. 302 °F)
-27 .. 150 °C
(-16 .. 302 °F)
1 .. 178 °C
(2 .. 320 °F)
1 °C
(2 °F)
6. Basic settings
In order to adapt the unit to a particular application, the function of the ETS 300 can be
altered via several basic settings. These are combined in one menu.
6.1 Altering the basic settings
Important note: when the menu is activated no switching operations are carried out.
Switch off supply voltage or disconnect the unit from the supply voltage.
H
mode
3 s
press “mode” key and
hold down. Switch
on supply voltage
(hold key down f or 3s)
To close the basic setting menu:
Call up the menu point "END", set to "YES", the ETS 300 returns to the normal display
mode after 2 seconds.
Note:
· If after about 50 seconds no keys have been pressed, the menu automatically closes
down. Any changes which may have been made will not be saved.
display
(release
“mode” key)
press “mode” key until th e
required menu point app ears
in the display
(for summary, see 6.2)
mode
H
2 s
Use or to alter
setting, then select next
.
menu point
.
mode
G
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6.2 Summary of the basic settings
Setting Display Setting
range
Switching mode switching output 1 (Sm 1)
SP/ Win SP
Switching output 1 operates in switching
point / hysteresis function
Switching output 1 operates in window
function
Switching direction switching output 1 (S 1)
ON/ OFF ON
“ON”: normally open function.
“OFF”: normally closed function.
Switch-on delay switching output 1 (T
on
1)
0 ..750s 0
Time in seconds which must elapse, once the
particular switching point has been reached or
exceeded, before switching will occur.
Switch-off delay switching output 1 (T
off
1)
0 ..750s 0
Time in seconds which must elapse, once the
temperature has fallen below the particular switch-back
point, before switching will occur.
Presetting
Switching output 2, as above
Primary display (Primary)
Display value which should remain permanently in the
display:
“ACT.”: actual temperature
“Top”: temperature peak value
“S.P.1” or “S.P.2”: switching point 1 or 2
“OFF”: display dark
(for function, see point 4 “Digital display”)
Version number (Version)
Display of the current software version (for reference
only)
To close basic settings (End)
ACT/
ACT
Top/
S.P.1/
S.P.2/
OFF
YES/ NO NO
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7. Programming enable
The unit has 2 types of programming enable which must both be set to "ON" to change the
settings. The operating programming enable can be set or removed during operation. It
provides protection from unintentional alteration. A programming disable via the main
programming enable has the effect that no change to the settings can be carried out during
operation. This serves, for example, as a safety function or as protection against
unauthorised alterations.
7.1 Altering the operating programming enable
mode
3 s
G
G
press both arrow
keys simultaneously
and hold down for 3 s
7.2 Altering the main programming enable
display
(release
arrow keys)
use or to alter setting,
ON
OFF
= programming possible
= programming disabled
mode
temperature
display
3 s
G
Switch off supply voltage or disconnect the unit from the supply voltage.
mode
3 s
"
main program state"
G G
press both arrow
keys simultaneously
and hold down
Switch on supply
voltage (hold keys
down for 3 s)
Note:
· If a setting has been changed "PRG" is displayed briefly when the display is switched
over. The new setting is then saved in the unit.
.
display
(release
arrow keys)
use or
=
ON
OFF
programming possible
=
programming disabled
mode
G
to alter setting
temperature
3 s
,
display
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8. Error messages
If an error is detected, then a corresponding error message appears which must be
acknowledged by pressing any key. Possible error messages are as follows:
E.01 The switching points and hystereses have been set in such a way that the
resulting switch-back point is no longer within the permissible setting range.
Example:
Switching point is set to 65 °C, the hysteresis to 100 °C.
The setting is not correct since the resulting switch-back point is no longer within
the measuring range: the error message is displayed.
Action: Correct the settings
E.10 A data error has been detected in the saved settings. Possible causes are strong
electromagnetic interference or a component fault.
Action: Check all the settings (programming enable, switching points, switch-back points
and basic settings) and correct these if necessary. If this error occurs frequently,
please contact Hydac Service.
E.12 An error has been detected in the stored calibration data. Possible causes are
strong electromagnetic interference or a component fault.
Action: Disconnect the unit and re-connect. If the error message is still displayed, the unit
must be returned to the manufacturer for re-calibration or repair.
E.20 A short-circuit has been detected on a switching output.
Action: Eliminate the short circuit.
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9. Technical specifications
Input data for built-in sensor:
Measuring range: -25 .. 100 °C (-13 .. 212 °F)
Pressure resistance: 600 bar
Overload pressure: 900 bar
Hydraulic connection: G1/2 A DIN 3852
Torque rating: 45 Nm
Parts in contact with medium: stainless steel, seal: FPM
Input data for separate sensor:
Display range: *)
Sensor connection: connector M 12x1, 4-pole
Output data:
Accuracy (display, analogue output)
Temperature drift:
Reaction time (T09): approx. 20 s
Analogue output:
Switching outputs:
Type: PNP transistor output
Switching current: max. 1.2 A
Switching cycles: > 100 million
Ambient conditions:
Temperature range of medium: -25 .. + 100 °C (built-in sensor)
Ambient temperature range: -25 .. + 80 °C
Storage temperature range: -40 .. + 80 °C
Nominal temperature range: -10 .. + 70 °C
- mark: EN 50081-1, EN 50081-2
Vibration resistance: approx. 10 g / 0..500 Hz
Shock resistance: approx. 50 g / 1ms
Other data:
Supply voltage: 20 .. 32 VDC
Current consumption: approx. 100 mA (no switching output)
Safety type: IP 65
Material of housing: tube: stainless steel
Display: 3-digit, 7-segment LED, red,
Weight: approx. 300 g
-30 .. 150 °C (-22 .. 302 °F)
£ ±1.0 °C (£ ±2.0 °F)
£ ±0.15 % /10 K (zero point and range)
4 .. 20 mA, ohmic resistance £ 400 W
EN 50082-1, EN 61000-6-2
keypad housing: PA6.6 Gf30
height of digits 9.2 mm
Technical specifications - Accessories
Temperature sensor TFP 100
Temperature range of medium (for TFP 100): -40 .. +125 °C / -40 .. +257°F
Electrical connection: 4-pole Binder plug, series 714 M18
Safety sleeve for tank-mounting the TFP 100
Parts in contact with medium: All materials compatible with nickel
Note: *) Depending on the temperature range of the temperature sensor fitted, this can
reduce the display range of the ETS 300 with a separate sensor input.
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10. Circuit diagram
10.1 Supply voltage, switching outputs, analogue output
Model with 1 switching output Model with 1 switching output and
1 analogue output
Plug to DIN 43650, 3 pole + earth 4 pole Binder plug, series 714 M18
Imax. 1.2 A
3
SP 1
I = 4..20 mA
4
analogue
RL
+
20..32 V
-
1
ETS 3X5-1
2
Imax. 1.2 A
3
SP 1
+
20..32 V
-
1
ETS 3X4-3
2
4 pole plug, M12x1 4 pole plug, M12x1
+
20..32 V
-
1
ETS 3X6-1
3
Imax. 1.2 A
4
SP 1
+
20..32 V
-
1
ETS 3X6-3
3
Imax. 1.2 A
4
SP 1
I = 4..20 mA
2
analogue
RL
Model with 2 switching outputs Model with switching outputs
and 1 analogue output
4 pole Binder plug, series 714 M18 5 pole plug, M12x1
Imax. 1.2 A
4
SP 1
Imax. 1.2 A
5
SP 2
I = 4..20 mA
2
analogue
RL
+
20..32 V
-
1
ETS 3X4-2
2
Imax. 1.2 A
3
SP 1
Imax. 1.2 A
4
SP 2
+
20..32 V
-
1
ETS 3X8-5
3
4 pole plug, M12x1
+
20..32 V
-
1
ETS 3X6-2
3
Imax. 1.2 A
4
SP 1
Imax. 1.2 A
2
SP 2
10.2 Connection diagram
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1 2 3 4
1 2 3 4
ETS 38X
connector
4-pole
M12x1
screened
cable
4-pole Binder
plug, series 714
sensor
resistance
TFP 100
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11. Model code
0
ETS 3 X X - X - X 0 X X
Series no.
(determined by manufacturer)
Type of connection, mechanical
2 = G1/2" A male thread
8 = electrical connection f or separat e sensor (TFP 100)
Type of connection, electrical
4 = 4-pol e Binder pl ug, series 714 M18
only available for output models “2” and “3”
(connector not included)
5 = plug to D IN 43650, 3 pole + earth
only available for output model “1”
(ZBE 01 connector included)
6 = 4 pole plug, M12x1
only available for output models “1”, “2” and “3”
(connector not included)
8 = 5 pole plug, M12x1
only available for output model “5”
(connector not included)
-
0
Output
1 = 1 switching output
(only in conjunction with electrical connection type “5” or “6”)
2 = 2 switching outputs
(only in conjunction with electrical connection type “4” or “6“)
3 = 1 switching output and 1 analogue output
(only in conjunction with electrical connection type “4” or “6“)
5 = 2 switching outputs and 1 analogue output
(only in conjunction with electrical connection type “8”)
Measurement ranges
100 = - 25 .. 100 °C (- 13 . . 212 °F) only for version with built-in sensor
150 = - 30 .. 150 °C (- 22 . . 302 °F) only for version with separa te sensor
Modification number
000 = display in °C (determined by manufacturer)
400 = display in °F (determined by manufacturer)
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12. Accessories
12.1 For electrical connection
ZBE 01 Right-angled plug (3 pole + earth), ZBE 02 4 pole straight Binder plug,
to DIN 43650 series 714 M18
ZBE 03 Right-angled, 4 pole Binder plug, ZBE 06 (4-pole) and ZBE 08 (5-pole)
series 714 M18 Right-angled plug, M12x1
ZBE 06-02 Right-angled plug (4 pole, M12x1) ZBE 08-02 Right-angled plug (5 pole,
with 2 m lead M12x1) with 2 m lead
ZBE 06-05 Right-angled plug (4 pole, M12x1) ZBE 08-05 Right-angled plug (5 pole,
with 5 m lead M12x1) with 5 m lead
Colour code:
Pin 1: brown
Pin 2: white
Pin 3: blue
Pin 4: black
Pin 5: grey
Colour code:
Pin 1: brown
Pin 2: white
Pin 3: blue
Pin 4: black
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12.2 For mechanical connection
ZBM 300 clamp for wall-mounting the ETS 300 (material: polypropylene)
Mounting:
· Glue damping strips into the recesses of
the base plate.
· Mount base plate, the top is indicated by
"OBEN", "TOP" and 2 arrows.
(illustration 1).
· Insert ETS 300.
· Fit clip (only one possible position) and
press hard on the cross-pieces until they
engage.
ZBM 310 clamp for wall-mounting the ETS 300 (material: polypropylene, aluminium AlSi12,
steel)
Mounting:
· Weld on base plate (steel)
· Mount ETS 300 according to illustration.
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13. Dimensions
13.1 ETS 300 with built-in temperature sensor
Plug to DIN 43650
3 pole + earth
Plug, M12x1
4 pole / 5 pole
Binder plug, 4 pole
Series 714 M18
hex-SW27
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13.2 ETS 300 with separate temperature sensor TFP 100
Plug to DIN 43650
3 pole + earth
M12x1 plug
Plug, M12x1
4 pole / 5 pole
Binder plug, 4 pole
Series 714 M18
connection cable LIYCY
(3m length)
connector ZBE 03
hex-SW27
safety sleeve
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