JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 33)

6 Safety Manual 33 2014-05-01
6.3 Safety temperature limiter (STB)
The safety temperature limiter is a device that is permanently locked after responding.
Manual reset using the key is possible once the probe temperature has fallen below / has exceeded the limit value by the
amount of the switching differential. Possible settings: monitoring for overrange or underrange.
Mode of operations:
-
Minimum requirements: 2B, 2J, 2V, 2K, 2P and adjustable with special tools
- Additional requirements: 2N, 2F, 2D
6.3.1 Safe operating status STB
The safe status is when the relay output alarm between terminals 14 and 16 is switched off (closed-circuit principle).
This status is maintained until manual unlocking is performed in the valid range of the device.
The transparent, sealable protective cover prevents unauthorized operation.
The
key for manual unlocking can be accessed with the aid of a tool.
6.4 Relevant standards
Failure of the devices could affect the safety of persons and/or the safety of the environment.
Certification to IEC 61 508 is provided because of the worldwide use of these systems.
The temperature monitoring unit type 701150 with extra code "058" meets the requirements
-
For safety function to SIL3 according to DIN EN 61 508 parts 1 to 7:
Functional Safety - Safety Related Electrical /Electronic / Programmable Electronic Systems
- DIN EN 61 511 Parts 1 to 3:
Functional Safety - Safety-Related Systems for the Process Industry
- DIN EN 14 597:2005-12:
Temperature Regulation Equipment and Temperature Limiter for Heat-Generating Systems
- DIN EN 60 730-2-9: