JUMO 605055 User Manual

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com

Data Sheet 605055

JUMO exTHERM-AT

Type 605055, Explosion-proof surface-mounted thermostat
for zones 1, 2, 21, and 22

Special features

• Single thermostat and double thermostat with capillary or rigid thermowell

• Switching capacity up to 25 A

• Admissible ambient temperatures -55 °C to +70 °C

• Thermowell for use in zone 0 available as an accessory

• Quick and safer electrical connection through Push-In

• Stable switching points through standard ambient temperature compensation

Brief description

The explosion-proof surface-mounted thermostats of the JUMO exTHERM series are built to
monitor and control temperatures in potentially explosive areas. The use in environments with
gas and steam is permitted (zones 1 and 2); use in environments with conductive dust (zones
21 and 22) is also permitted.

®

terminal technology

JUMO exTHERM-AT double thermostat

Page 1/9

The JUMO exTHERM-AT is available as temperature monitor TW, safety temperature monitor
(STW), and safety temperature limiter (STB). The thermostats work according to the liquid ex­pansion or gas expansion principle. The electrical switching element is a pressure-resistant en­capsulated thermostat with a snap-action switch. Stable switching points when ambient
temperatures fluctuate are made possible by the standard ambient temperature compensation.

The thermostats of the JUMO exTHERM-AT series are RoHS conform and cadmium free.

Ver sion according to DIN EN 14597:
TW Temperature monitor
STW Safety temperature monitor
STB Safety temperature limiter

ATEX identification IECEx identification

II 2G Ex d e IIC T4/T5/T6 Gb

For explosive gas atmosphere

II 2D Ex tb IIIC T85 °C/T100°C/T130°C Db

For explosive dust atmosphere

2G Ex d e IIC T4/T5/T6 Gb

For explosive gas atmosphere

2D Ex tb IIIC T85 °C/T100 °C/T130°C Db

For explosive dust atmosphere

ATEX confirmation IECEx confirmation

EPS 11 ATEX 1 354 IECEx EPS 13.0046

JUMO exTHERM-AT single thermostat

Approvals/approval marks (see "Technical data")

*

2014-07-15/00576368

* Available with

extra code (TZ 372)

Data Sheet 605055 Page 2/9

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com

Technical data

Switching function

Temperature monitor TW and safety tem­perature monitor STW

If the temperature on the temperature probe
exceeds the setpoint value, the microswitch is
activated by the transmission mechanics and
the electrical circuit is opened or closed.

If the temperature falls below the selected set­point value (by the amount of the switching
differential), the microswitch is reset to its ini­tial position.

Temperature compensation

When the ambient temperature on the switching head and the capillary deviates – from the calibration ambient temper­ature of +22 °C – a switching point offset occurs. This switching point offset is reduced to a minimum due to the tem­perature compensation.

Case

Material Polyester case, glass fiber reinforced, black (option: stainless steel)
Protection type EN 60529 - IP66 (polyester case), pollution level 2, IP 66 with extra code 861
Setpoint

value adjustment
Switching

head fastening
Weight Approx. 1200 g single thermostat / approx. 2000 g double thermostat
Cable inlet Ex cable gland M20 × 1.5, sealing area 6 to 13 mm

Restart lock for the safety
temperature limiter STB

If the temperature on the temperature probe
exceeds the set limit value, the electrical cir­cuit is opened and the microswitch is mechan­ically locked.

The microswitch can be manually unlocked
once the dangerous temperature of the set­point value drops by approx. 20 % of the scale
range.

With screwdriver (once the case lid has been removed)

Using four screws (once the case lid has been removed)

and Ex cable gland M25 × 1.5, sealing area 7 to 17 mm

Self-monitoring for the safety temperature
monitor STW and safety temperature limiter
STB

If the measuring system is destroyed (i.e. if the
expansion fluid escapes) the pressure in the
membrane of the STB and STW drops and
permanently opens the electrical circuit.
Unlocking is then no longer possible.

If the probe has cooled down to a temperature
below approx. 40 °C the electrical circuit also
opens – however it automatically closes again
when the temperature rises.

Process connection

JUMO exTHERM-AT
with capillary

Plain cylindrical probe (standard), rigid thermowell, spiral probe for room thermostat version

Accessories

JUMO exTHERM-AT Multi-section standard thermowells made out of CrNi for use in zones 1, 2, 21, 22 (see data sheet 606710)

Multi-section thermowells made out of CrNi for use in zone separation 0/1, 20/21 (see new data sheet 605057)

Operating data

Medium ambient
temperature influence

deviates from the calibration ambient temperature of +22 °C, a switching point offset occurs.

When the ambient temperature on the switching head and/or the capillary

Higher ambient temperature = lower switching point
Lower ambient temperature = higher switching point

Admissible storage
temperature / admissi­ble ambient tempera-

-40 °C, optionally -55 °C to +70 °C (referring to T4)

ture when in use
Max.

probe temperature

+15 % of the limit value / max. adjustment value or 25 K

Rated position (NL) According to DIN 16257, NL 0 to NL 90

2014-07-15/00576368

Data Sheet 605055 Page 3/9

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com

Electrical data

Max. switching capacity Selectable on the N/C contact (contact deck 1-2):

AC 400 V +10 %, 16 A

AC 230 V +10 %, 16 (2.5) A, cos ϕ = 1 (0.6)*

AC 230 V +10 %, 25 (4) A, cos ϕ =1(0.6)

DC 230 V +10 %, 0.25 A
Selectable on the N/O contact (contact deck 1-4):
TW, STW STB
AC 400 V +10 %, 6.3 A

AC 230 V +10 %, 6.3 (2.5) A, cos ϕ = 1 (0.6)*

AC 230 V +10 %, 2 (0.4) A, cos ϕ =1(0.6)

DC 230 V +10 %, 0.25 A

AC 400V +10%, 2A

AC 230 V +10 %, 2 (0.4) A, cos ϕ =1(0.6)*

AC 230 V +10 %, 2 (0.4) A, cos ϕ =1(0.6)

AC 230 V +10 %, 0.25 A

Snap-action switch, gold-plated AC / DC = 24 V, 0.1 mA

Min. switching capacity To ensure the greatest possible switching reliability we recommend a minimum load of:

AC / DC = 24 V, 100 mA for silver contacts

AC / DC = 10 V, 5 mA for gold-plated contacts

Capillary and temperature probe
Type Capillary∅ 1.5 mm Temperature probe

JUMO exTHERM-AT Stainless steel (CrNi) 1.4571 Stainless steel (CrNi) 1.4571, welded
Capillary length Max. 5000 mm
Capillary bending radius

≥ 5mm

* standard

Control ranges and probe table

Control range Max.

capillary length

For "d" = 4 mm For "d" = 6 mm

Probe length "L"

TW STW, STB TW STW, STB

Hysteresis

In °C In mm Approx. 2.5 % Approx. 7 % Approx. 2.5 % Approx. 7 %

-20 to +50

- - - - 138 81
0 to [phone]
0 to [phone]

+130 to +190 - - - - 115 70

5000
+50 to [phone] - ­+20 to +500 - - - - 278 - -

+140 to +500 - - - - - - 126

Switching point tolerance in the middle section of the scale

Control range

in °C

TW

in K

STW upward adjustment

in K

STW downward adjustment

in K

STB

in K

-20 to +40 +2/-2 - - - - - -

-20 to +50 +3/-3 +0/-5 +5/-0 +0/-5
0 to +100 +5/-5 +0/-10 +10/-0 +0/-10
0 to +120 +5/-5 +0/-10 +10/-0 +0/-10

+130 to +190 +8/-8 +0/-16 +16/-0 +0/-16

0 to +200 +8/-8 +0/-16 +16/-0 +0/-16

+50 to +300 +12/-12 +0/-24 +24/-0 +0/-24
+20 to +500 +22/-22 - - - - - -

+140 to +500 +22/-22 +0/-44 +44/-0 +0/-44

Temperature monitors (TW) and safety temperature monitors (STW) are adjusted ascendingly in the middle section of the scale as standard
procedure. Safety temperature limiters (STB) are adjusted in the upper section of the scale. Special adjustments are possible upon request.

Approvals/approval marks

JUMO exTHERM-AT Switching function Certificates/test confirmations Tests

TW EPS 11 ATEX 1 354 ATEX

STW IECEx EPS 13.0046 IECEx TZ 372

STB POCC DE.ME92.B02680 GOST

2014-07-15/00576368