JUMO 60.2025 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

Panel-mounted Thermostat

DGRL

97/23/EG

EM Series

Special features

• Safety temperature monitor STW (STB)

• Safety temperature limiter STB

• Tested according to DIN EN 14597 and the Pressure Equipment Directive 97/23/EC

Brief description

Panel-mounted thermostats are used to monitor thermal processes. The devices are available
as safety temperature monitor STW (STB) and safety temperature limiter STB. In the event of a
malfunction, the STB switches the monitored machine to a safe operating status.

Data Sheet 602026

Page 1/7

Panel-mounted thermostats operate according to the fluid expansion principle
is used as the electrical switching element.

− a microswitch

Switching function

Safety temperature monitor STW (STB)

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 (by the amount of the switching differential), the
microswitch is reset to its initial position.

Restart lock of 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 temperature has dropped by approx. 10 °C.

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

If the measuring system is destroyed (i.e. if the expansion fluid leaks), the pressure in the dia­phragm of the STB drops and permanently opens the electrical circuit. Unlocking is then no lon­ger possible. When the probe has cooled down to a temperature below approx. -20 °C, the
electrical circuit is also opened. However, it automatically closes again when the temperature
rises.

Use of the safety temperature monitor STW
as a safety temperature limiter STB

The activation lock required by DIN EN 14597 must be warranted by the following circuit dia­gram. The circuit diagram must comply with DIN EN 50156.

Approvals/approval marks (see "Technical Data")

2013-03-06/00073209

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

General information

Limit value range, limit value range setting, and temperature probe

Type Limit value range

Limit value setting

°C

EM-20-E +40 to +110

+100 to +150
+110 to +170
+180 to +250
+230 to +300

Limit value setting done
prior to mounting with a

screwdriver at the limit

value knob.

EM-30-E Optional limit value

+20 to +300

Permanently factory-set

EM-80 Optional limit value

+60 to +180

Permanently factory-set

Max. allowable

probe temperature

Limit value

Limit value

°C

+135
+173
+195
+288
+345

+15 %

+15 %

Data Sheet 602026 Page 2/7

Limit value tolerance°CProbe length, dimen-

sion "L"

for probe Ø "d"= 6 mm

mm

+0/-9
+0/-8

+0/-9
+0/-13
+0/-14

72
85
72
60
60

+0/-5 84

Capillary and temperature probe

Type Scale limit value Capillary Temperature probe Notes

EM- . . Up to 200 °C Copper (Cu)

ø 1.5 mm

Material no. Cu-DHP

Up to 300 °C Copper (Cu)

ø 1.5 mm

Material no. Cu-DHP

Up to 300 °C Stainless steel (CrNi)

ø 1.5 mm

Copper (Cu)

Material No. Cu-DHP

Hard soldered

Stainless steel (CrNi)

Material No. 1.4571

Hard soldered

Stainless steel (CrNi)

Material no. 1.4571

- -

- -

Available at extra cost

welded
Capillary length Standard: 1000 mm, max. 5000 mm
Min. bending radius of the

capillary

5 mm

Electrical data

Switching element:

Single-pole snap-action
switch

Microswitch with changeover con-

Max. switching capacity Type N/C contact, terminal 2 N/O contact, terminal 4

Contact reliability To ensure a high switching reliability, we recommend a minimum load of:

Rating surge voltage 1500 V (via the switching contacts 400 V)
Overvoltage category I I
Required fuse rating See max. switching capacity

2013-03-06/00073209

Type EM-20-E
Type EM-30-E

Microswitch with N/C contact and

tact

Typ e EM - 80

Standard

restart lock

Typ e EM - 80

with extra code "574"

Microswitch with N/C contact, re-

start lock, and additional signal

contact

EM-20-E
EM-30-E
EM-80/U

AC 230 V +10 %,

10 (2) A, cos ϕ = 1 (0.6)

DC 230 V +10 %, 0.25A

AC 230 V +10 %,
2 (0.4) A, cos ϕ = 1 (0.6)
DC 230 V +10 %, 0.25A

EM-80 - -

Extra code "574" Microswitch with gold plating, AC / DC 24 V, 0.1 A

For silver contacts:

AC / DC = 24 V, 20 mA

For gold-plated contacts (extra code "702"):

AC/DC = 5V, 5mA

Data Sheet 602026 Page 3/7

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 connection Standard Tab connector A 6.3 x 0.8 DIN 46244

2

Extra code 699 Screw connection up to 2.5 mm

conductor cross section (available at

extra cost) — also suitable for retrofitting —

Switching differential in %
from the limit value range

Mid ambient temperature
influence

Switching function Rated value Possible actual value

STW (STB) 7 7-8

(In % from the scale range) referring to the limit value.
Deviation of the ambient temperature at the switching head and/or capillary from the +22 °C calibration ambi­ent temperature produces a switching head offset.
Higher ambient temperature = lower switching point
Lower ambient temperature = higher switching point

For temperatures with scale limit value / limit value

< +200 °C ≥ +200 °C ≤ +350 °C

STW (STB) Switching differential in %

77

Ambient temperature influence on the switching head in %/°C

0.43 0.35
Ambient temperature influence on the capillary in %/m

0.09 · °C · m 0.07 · °C · m

STB Ambient temperature influence on the switching head: 0.35 °C/°C

Ambient temperature influence on the capillary in °C/m 0.07 °C/°C·m

Temperature compensation Extra code "707"

For detailed information please refer to the graphical diagram on page 5.

Allowable storage tempera-

-50 to +50 °C

ture

Allowable ambient tempera­ture when in use on the
switching head and capillary

Rated position (NL)

Min. +18 °C (0 °C for extra code "707")

Max. +80 °C

Any

Switching head

Case material Sheet steel, galvanized
Mounting Extra code 704 with 2 M4 screws, spaced 28 mm

Extra code 705 with 2 M3 screws, spaced 33 mm

Extra code 706 with 2 M3 screws, spaced 22 mm (standard for EM-20-E and EM-30-E)

Extra code 710, central mounting M10 x 1 with acorn nut (only for STB, standard for EM-80)
Protection type EN 60 529-IP 00
Weigh t Approx. 0.3 kg

Process connection

EM series
with capillary

Material Thermowell Up to +150 °C CuZn as a standard

a

Plain cylindrical probe "10" (standard)

Screw-in thermowell "20" (upon request)

Screw-in sleeve with screw-in spigot G 1/2 form A according to DIN 3852/2

and clamping piece with fixing screw for securing the probe

Over +150 °C CrNi
Insertion length S Standard lengths: 100, 120, 150, 200, or 300 mm (different lengths upon request)
Immersion tube Ø D = 8 mm

a

For different process connections and thermowells refer to data sheet 606710.

Note: Physical and toxicological properties of the expansion medium that may escape in the event of a measuring system facture.
Control range

with scale limit value

≤ +200 °C No +355 °C 0.6 - 8 V % Yes Yes

a

At present, no statement concerning health hazards in the event of short-term and low concentration exposure (e.g. measuring system rupture) has been made by
the health authority.

2013-03-06/00073209

Hazardous

reactions

Fire and explosion hazard Hazardous to

Ignition

temperature

Explosion

limit

water

Irritant Health risks Toxic

Information about toxicology

a

No