TX
Rod thermostats (without immersion tube)
Rod thermostats are suitable for direct
installation in tanks, piplines and air ducts.
The immersion well can be fitted in advance.
Sil 2 according iEc 61508-2
TX 490
Technical data
Housing
Diecast aluminium GD Al
Si 12 according to DIN
1725.
Product Summary
Type
Setting range
Switching
differential
(mean values)
Max. permissible
temperature
at sensor
Mounting position
Any, preferably vertical
permitted. ambient
+70°C
temperature at
switching device
Max. perm. tem-
See Product Summary
perature at sensor
Contact
arrangement
Single pole
changeover switch
Switching capacity
8 (5) A 250 VAC
Degree of
protection
Calibration
IP 54 according to
DIN EN60529 (with
vertical installation)
Scale value corresponds
to the lower switching
point (with falling
temperature), the upper
switching point is higher
by the amount of the
switching differential
Via angled plug to
DIN EN175301 (3-pin +
earth contact), cable
entry Pg 11, max. cable
diameter 10 mm,
cable outlet possible in
4 directions spaced 90°
apart. Supplied with plug.
Adjustable from outside
with screwdriver
Not adjustable
immersion
TXB023
TXB150
TXB490
TXB813
depth 220 mm
–20 to + 30 °C
+10 to + 50 °C
+40 to + 90 °C
+80 to +130 °C
1.5
1.5
2.5
4.0
K
K
K
K
110
110
125
150
°C
°C
°C
°C
+
Plug connection
EN175301
Switching
temperature
Switching
differential
-TX
see page 118
s
Protection Class:
IP 54
Accessories
Solenoid valves
Flow monitors
Accessories
Immersion tube type R10/MS, R20/MS,
R10/NST, R20/NST, see page 157.
Immersion tubes for NPT thread
on request.
Dimensioned
drawing (mm)
Temperature sensors
immersion
TX023
TX150
TX490
TX813
depth 135 mm
–20 to + 30 °C
+10 to + 50 °C
+40 to + 90 °C
+80 to +130 °C
1.5
1.5
2.5
4.0
K
K
K
K
110
110
125
150
°C
°C
°C
°C
Thermostats
Pressure transmitters
Pressure switches
Mechanical thermostats
Liquids and gases
113
General technical information
for series TX, TRM and TAM
Switching temperature
(large screw)
Switching differential
(small screw)
Electrical connection
Plug connection to DIN EN175301. Cable entry Pg 11, max. cable diameter 10 mm.
Cable outlet possible in 4 directions spaced 90° apart.
Mounting position
A vertical mounting position is preferable if at all possible. IP 54 protection is guaranteed with a
vertical mounting position. A different mounting position may alter the protection class, but the
operation of the thermostat is not affected.
Outdoor installation of thermostats
FEMA thermostats can be installed out of doors provided they are mounted vertically and suitably
protected against the direct effects of weather. At ambient temperatures below 0°C, ensure that
condensation cannot occur in the sensor or in the switching device.
Accessories
Solenoid valves
Flow monitors
Temperature limiter with reclosing lockout
Additional function ZFT205 and ZFT206:
All thermostats can be equipped with a mechanical
interlock. On reaching the value set on the scale, the microswitch trips over and remains in this
position.
The lock can be released by pressing the unlocking button (identified by a red dot on the scale side
of the switching device). The interlock can take effect with rising or falling temperature, depending on
the version.
Temperature sensors
changing the switching differential (only for switching device TrMV…)
The switching differential is changed by turning the setscrew within the spindle. The lower switching
point is not changed by the differential adjustment; only the upper switching point is shifted by the
differential. One turn of the differential screw changes the switching differential by about 1/2 of the
total differential range.
When adjusting please note:
Switching temperature:
Clockwise for lower switching point.
Anticlockwise for higher switching point.
Switching differential:
Clockwise for larger differential. Anticlockwise for smaller differential.
Thermostats
Setting the switching temperature (setpoint adjustment)
Prior to adjustment, the setscrew above the scale must be loosened by approx. 2 turns and
retightened after setting.
The switching temperature is set via the spindle. The set switching temperature is shown by the
scale.
In view of tolerances and variations in the characteristics of sensors and springs, and due to friction in
the switching kinematics, slight discrepancies between the setting value and the switching point are
unavoidable. The thermostats are usually calibrated in such a way that the setpoint adjustment and
the actual switching temperature correspond as closely as possible in the middle of the range.
Possible deviations spread to both sides equally.
clockwise: low switching temperature
Anticlockwise: high switching temperature
Pressure transmitters
Adjustment of thermostats at lower switching point
Setpoint x
S
corresponds to the lower switching point (with falling temperature), the upper switching
point x
O
(with rising temperature) is higher by the amount of the switching differential x
d
.
Pressure switches
Mechanical thermostats
General technical information
99
100
Mechanical thermostats
Principal technical data
Mechanical thermostats
Principal technical data
Standard version
Terminal connection
…200
Switch housing
Switching function
and connection scheme
(applies only to version
with microswitch)
Diecast aluminium GDAISi 12
Floating changeover contact
With rising pressure
single pole switching from 3–1 to 3–2
…300
Diecast aluminium GDAISi 12
Floating changeover contact.
With rising pressure
single pole switching from 3–1 to 3–2
Switching capacity
(applies only to version
with microswitch)
Mounting position
8 A at 250 VAC
5 A at 250 VAC inductive
8 A at 24 VDC
0.3 A at 250 VDC
min. 10 mA, 12 VDC
Vertical or horizontal,
preferably vertical
IP 54
8 A at 250 VAC
5 A at 250 VAC inductive
8 A at 24 VDC
0.3 A at 250 VDC
min. 10 mA, 12 VDC
Vertical
Protection class
(in vertical position)
Electrical connection
cable entry
Ambient temperature
Switching point
Switching differential
Medium temperature
Vibration strength
IP 65
Plug connection to DIN EN175301
Pg 11
–15 to +70 °C
Adjustable with spindle
Terminal connection
M 16 x 1.5
–15 to +70 °C
Adjustable with spindle after
the terminal box cover is removed
Not adjustable
isolation values
Sensor systems
Adjustable or not adjustable
(see Product Summary)
Max. 70 °C, briefly 85 °C
Max. 70 °C, briefly 85 °C
No significant deviations up to 4 g.
At higher accelerations, the switching differential is reduced slightly.
Use over 25 g is not permitted.
Overvoltage category III, contamination class 3, reference surge voltage 4000 V.
Conformity to DIN VDE 0110 is confirmed.
room
sensor TrM
capillary tube
sensor TAM
rod sensor
TX+r10
Air duct sensor
TX+r6
Mechanical thermostats
Principal technical data
Terminal connection
version
…500 (Ex-i)
Switch housing
Switching function
and connection scheme
(applies only to version
with microswitch)
Diecast aluminium GDAISi 12
Floating changeover contact
With rising pressure
single pole switching from 3–1 to 3–2
…700 (Ex-d)
Diecast aluminium GDAISi 12
Floating changeover contact.
With rising pressure
single pole switching from 3–1 to 3–2
Mounting position
Protection class
(in vertical position)
Explosion protection
with immersion well
Vertical or horizontal,
vertically upright
IP 65
ii 1/2G Ex ia iic T6 Ga/Gb
ii 1/2D Ex ia iilc T80 °c
IP 65
s
0035
ii 2G Ex d e iic T6 Gb
s
0035
ii 1/2D Ex ta/tb ilic T80 °c Da/Db
Exception: EX-TrM…:
ii 2G Ex d e iic T6 Gb
ii 2D Ex tb iiic T80°c Db
Terminal connection
M 16 x 1.5
–20 to +60 °C
Adjustable with spindle after
the terminal box cover is removed
Electrical connection
cable entry
Ambient temperature
Switching point
Terminal connection
M 16 x 1.5
–15 to +60 °C
Adjustable with spindle after
the terminal box cover is removed
Switching differential
Medium temperature
Vibration strength
isolation values
Sensor systems
room
sensor TrM
capillary tube
sensor TAM
rod sensor
TX+r10
Air duct sensor
TX+r6
Accessories
Solenoid valves
not adjustable
Not adjustable
Max. 60 °C
Max. 60 °C
No significant deviations up to 4 g.
At higher accelerations, the switching differential is reduced slightly.
Use over 25 g is not permitted.
Overvoltage category III, contamination class 3, reference surge voltage 4000 V.
Conformity to DIN VDE 0110 is confirmed.
Flow monitors
Temperature sensors
Switching capacity
(applies only to version
with microswitch)
max. 100 mA, 24 VDC
min. 2 mA, 24 VDC
3 A at 250 VAC
2 A at 250 VAC inductive
3 A at 24 VDC
0.03 A at 250 VDC
min. 2 mA, 24 VDC
Vertically upright
Thermostats
Pressure transmitters
Pressure switches
Mechanical thermostats
Principal technical data
101
102
Mechanical thermostats
Principal technical data
Plug connection
200 series
Description
connection scheme
Standard version
Microswitch, single pole switching
ZFT213
Gold-plated contacts
with low contact resistance
(e. g. for low voltage)
Adjustable switching diff. is not available
ZFT301
Terminal connection housing (iP 65)
ZFT351
Protection class iP 65 and switch
housing with surface protection
(terminal connection housing)
ZFT513
Ex-i-version
500 housing, blue cable entry and terminal connection
Gold-plated contacts, protection class IP 65
ATEX-Approval: please see page 10 – 13
Power supply circuit:
Ui
24 V DC
Ii
100 mA
Ci
1 nF
Li
100 µH
* Additional prices are to be added to the standard equipment prices in each case.
For devices which differ from the standard equipment, the code of the switching device is part of the type designation.
** Switching point adjustment: Please specify switching point and direction of action (rising or falling temperature).
Example for ordering:
TX150-513
Code of additional function
Code for temperature range
Type
Service functions
Devices with service functions will be produced individually according to the customer’s specifications. The system requires that these
product combinations be identified in such a way as to prevent any possibility of confusion. These combinations are characterised by a
product code with the suffix "-S" on the packaging label as well as separate labels with barcodes for each service function.
Service functions
ZFT5970
ZFT5971
ZFT1978
WZ2.2
AZ3.1B1
Setting of switching point according to customer’s instructions
Setting of switching points according to customer’s instructions with lead sealing
labelling of units
according to customer’s instructions with sticker
Test certificates according to En 10 204
Factory certificate 2.2 based on non-specific specimen test
Acceptance test certificate 3.1 based on specific test
** Switching point adjustment:
Please specify
switching point and direction of action
(rising or falling pressure).
Service functions are available for the following type series (including Ex-versions):
Thermostats: TAM, TX, TRM,
Ordering devices with service functions:
See page 33.
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