118
s
Mechanical thermostats
Tested to ATEX 94/9/EC
Ex-TX
Protection class with immersion tube:
II 2G Ex d e IIC T6 Gb
II 1/2D Ex ta/tb IIIC T80 ºC Da/Db
Rod thermostats are suitable for direct
installation in tanks, pipelines and air ducts.
The immersion wells can be fitted in advance.
Technical data
Housing Diecast aluminium GD Al
Si 12 according to DIN
1725.
Mounting position vertically upright
Permitted ambient -20...+60°C
temperature at
switching device
Permitted tem- See Product Summary
perature at sensor
Contact Single pole
arrangement changeover switch
Switching capacity 8 (5) A 250 VAC
Degree of IP 65 according to
protection DIN EN60529 (with
vertical installation)
Calibration Scale value corresponds
to the lower switching
point (with falling
temperature), the upper
switching point is higher
by the amount of the
switching differential
Switching Adjustable from outside
temperature with screwdriver
Switching Not adjustable
Ex-TX490
Type Setting range Switching Max. permissible
differential (mean temperatur
values) at sensor
Immersion depth 135 mm
Ex-TX023 –20 to + 30 °C 1.5 K 110 °C
Ex-TX150 +10 to + 50 °C 1.5 K 110 °C
Ex-TX490 +40 to + 90 °C 2.5 K 125 °C
Immersion depth 220 mm
Ex-TXB023 –20 to + 30 °C 1.5 K 110 °C
Ex-TXB150 +10 to + 50 °C 1.5 K 110 °C
Ex-TXB490 +40 to + 90 °C 2.5 K 125 °C
Product Summary
Accessories
Immersion tube type R10/MS,
R20/MS, R10/NST, R20/NST,
page 157.
Immersion tubes for NPT
thread on request.
+
Protection Class:
IP 65
s
SIL 2 according IEC 61508-2
Dimensioned drawings (mm)
Switching housing 700 (terminal connection, Ex-d)
Switching housing
Temperature sensor
117
Accessories Pressure switchesPressure transmittersThermostatsTemperature sensorsFlow monitorsSolenoid valves
Mechanical thermostats
Tested to ATEX 94/9/EC
Temperature monitoring
in explosion-endangered areas
Temperature switches with special equipment can also be used in
explosion risk areas Zone 1, 2 and 21, 22.
The following alternatives are possible:
1. Type of ignition protection Ex-d, Ex-e and Ex-t:
The thermostat with protection type "Flameproof Ex-d and Increased Saftey Ex-e" can be used in
hazardous areas of zone 1 and 2 for flammable gas mixtures. For use in dust atmospheres, the
protection is "prtected by enclosure Ex-t".
The thermostat may be used in hazardous areas of zones 21 and 22 for explosive dusts. In addition,
for the dust – explosion protect zone 20 on the sensor (device screwed into container walls, which
may occur in the interior permanent dust atmosphere).
The permissible values for switching voltage, switching capacity and ambient temperature please
refer to the detailed description of the Ex equipment, and the installation and operating instructions.
In addition, please note the general rules for the use and installation of equipment in hazardous
atmosphere.
Special circuits, as well as versions with adjustable switching differential or internal interlock
(reclosing lock) are not possible.
2. Ignition protection Ex-i
All thermostat with features for intrinsically safe circuits can be used in hazardous areas Zone 1 and
2 (Gas) and zones 21 and 22 (Dust). A circuit is considered to be "intrinsically safe" if the amount of
energy conveyed therein is not capable of generating an ignitable sparks. This thermostat can only
be operated in combination with a suitable isolating switching amplifier, which is approved for the
type Ex-i. Because of the low voltages and currents in intrinsically safe circuits, micro switches with
gold contacts are used for temperature monitors with automatic reset. FEMA thermostats for use in
intrinsically safe circuit are marked by blue terminals and cable entries. In addition, the thermostats
has been tested by a "notified body". The units get a serial number and the nameplate inform about
the ignition protection and registration number.
Isolating
amplifier
Ingniton protection for pressure monitoring in Zone 0 (20), 1 (21) and 2 (22)
Intrinsically safe Ex-i
(EN 60079-11:2012)
T…-513, …-563
Marking:
s 0035 II 2G Ex ia IIC T6 Gb
s 0035 II 2D Ex ia IIIC T80°C Db
ATEX approval for the complete
switching device
ATEX approval for isolating amplifiers
Thermostat with gold-plated contacts
Rated value without resistor combination
…-513 /…-563:
Ui: 24VDC
Ii: 100mA
Ci: 1nF
Li: 100µH
Thermostat will be installed in Ex-Zone.
The isolating amplifier must be installed
outside the Ex-Zone.
Marking, use in thermowell:
s 0035 II 2G Ex d e IIC T6 Gb
s 0035 II 1/2D Ex ta/tb IIIC T80°C Da/Db
Exception: EX-TRM…:
s 0035 II 2G Ex d e IIC T6 Gb
s 0035 II 2D Ex tb IIIC T80°C Db
ATEX approval for the complete switching device
Thermostat with a silver contact
Switching capacity:
max. 3 A, 250 VAC
min. 2 mA, 24 VDC
Thermostat can be installed within the Ex-Zone
Pressure-proof encapsulation Ex-d (EN60079-0:2009)
Enhanced safety Ex-e (EN60079-7:2007)
Protection via housing Ex-t (EN60079-31:2009)
Ex-T…
101
Accessories Pressure switchesPressure transmittersThermostatsTemperature sensorsFlow monitorsSolenoid valves
Mechanical thermostats
Principal technical data
Mechanical thermostats
Principal technical data
Room
sensor TRM
Capillary tube
sensor TAM
Rod sensor
TX+R10
Air duct sensor
TX+R6
Terminal connection version
…500 (Ex-i) …700 (Ex-d)
Switch housing Diecast aluminium GDAISi 12 Diecast aluminium GDAISi 12
Switching function Floating changeover contact Floating changeover contact.
and connection scheme With rising pressure With rising pressure
(applies only to version single pole switching from 3–1 to 3–2 single pole switching from 3–1 to 3–2
with microswitch)
Switching capacity max. 100 mA, 24 VDC 3 A at 250 VAC
(applies only to version min. 2 mA, 24 VDC 2 A at 250 VAC inductive
with microswitch) 3 A at 24 VDC
0.03 A at 250 VDC
min. 2 mA, 24 VDC
Mounting position Vertical or horizontal, Vertically upright
vertically upright
Protection class IP 65 IP 65
(in vertical position)
Explosion protection II 1/2G Ex ia IIC T6 Ga/Gb s 0035 II 2G Ex d e IIC T6 Gb
with immersion well II 1/2D Ex ia IIlC T80 °C 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
Electrical connection Terminal connection Terminal connection
Cable entry M 16 x 1.5 M 16 x 1.5
Ambient temperature –15 to +60 °C –20 to +60 °C
Switching point Adjustable with spindle after Adjustable with spindle after
the terminal box cover is removed the terminal box cover is removed
Switching differential not adjustable Not adjustable
Medium temperature Max. 60 °C Max. 60 °C
Vibration strength No significant deviations up to 4 g.
At higher accelerations, the switching differential is reduced slightly.
Use over 25 g is not permitted.
Isolation values Overvoltage category III, contamination class 3, reference surge voltage 4000 V.
Conformity to DIN VDE 0110 is confirmed.
Sensor systems
