Instruction Manual

2013-04-09/00073204
Data Sheet 601540 Page 2/4
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
Approvals/Approval marks
Electrical data STM-RW-2 STM-RW-2/OS (729)
Switching element Micro switch with change-over contact Micro switch with 2 separate current circuits
1 x N/C contact and 1 x N/O contact
maximum
permissible contact rating
AC 230 V +10%, 10 (2) A, cos ϕ = 1 (0.6)
DC 230 V +10%, 0.25A
Contact reliability To ensure high switching reliability, we recommend a minimum load of:
AC / DC 24 V, 20 mA
Rating surge voltage 2500 V (via the switching contacts 400 V)
Overvoltage category II Required fusing, see maximum switching current
Operating data
Limit value range +40 °C to +120 °C (factory-set to +100 °C)
+20 °C to +400 °C (factory-set to +120 °C)
Hysteresis Limit value range STM-RW-2 STM-RW-2/OS (729)
+40 °C to +120 °C
+20 °C to +400 °C
10 - 18 K
10 - 22 K
10 - 30 K
10 - 40 K
Switching point accuracy
referring to the switch-off
point
Limit value range Scale beginning Scale end
+40 °C to +120 °C
+20 °C to +400 °C
+0/-10 K
+0/-15 K
+0/-10 K
+0/-20 K
Time constant Flue gas: ≤ 45 sec.
Average
ambient temperature influ-
ence
Switching point offset referring to the deviation of +22 °C ~ 0.07 K/K
Tempera tu res / Position STM-RW-2
Permissible
ambient temperature
on the probe:
on the switch head:
max. +700 °C
max. +80°C, min. -50°C
Set point adjustment after removal of the case lid via internal scale
Permissible storage tempera-
ture
max. +80°C / min. -50°C
Rated position as per DIN 16257, NL 0 to NL 90 (different rated positions (NL) on request)
Case
Case Aluminum die cast, surface with impact resistant textured paint; lid: RAL 7032, bottom section: RAL 7015
Cable inlet clamping gland M 20 × 1.5
Protection class EN 60 529-IP54
Weight approx. 0.8 kg
Process connection
Connection type "DZ“ G 1/2 (fixed hexagon with external thread G 1/2), material: Steel
Immersion tube 15 x 150 mm, Material: Steel
Approval marks Inspection authority Certificates / Inspection
number
Inspection basics valid for
DIN EN 14597 DIN CERTCO / TÜV Süd ATW 862 DIN EN 14597 STM-RW-2