GHM-Martens STL50 User manual

Operating manual
Safety temperature
limiter
STL50
Approved in accordance with:
DIN EN 14597 (replacing DIN 3440)
SIL 2
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English
Company / brands of GHM
www.ghm-messtechnik.de

GHM Group – Martens
GHM Messtechnik GmbH | Kiebitzhörn 18 | 22885 Barsbüttel | Germany
Phone [phone] | [email protected] | www.ghm-group.de
2
Content
1Intended use (areas of application) ................................................................................. 3
1.1 Safety signs and symbols ......................................................................................... 3
1.2 Safety instructions ..................................................................................................... 4
1.3 Product liability and warranty .................................................................................... 4
1.4 Standards and directives........................................................................................... 4
1.5 Approvals .................................................................................................................. 4
2Product description.......................................................................................................... 5
2.1 Scope of delivery ....................................................................................................... 5
2.2 Features .................................................................................................................... 5
2.3 Brief information ........................................................................................................ 6
2.4 Dimensions ............................................................................................................... 6
2.5 Connection diagrams ................................................................................................ 7
2.6 Electrical installation .................................................................................................. 8
3Controls and functional description ................................................................................. 9
3.1 Operating and display elements ............................................................................... 9
3.2 Operation .................................................................................................................. 9
3.3 Operating level ........................................................................................................ 11
3.4 Configuration level .................................................................................................. 12
3.5 Error messages ....................................................................................................... 17
3.6 Functional safety ..................................................................................................... 19
3.7 Functional test ......................................................................................................... 20
3.8 Approved temperature probes ................................................................................ 21
4Technical data ............................................................................................................... 22
4.1 Ordering code ......................................................................................................... 23
5Device transport and storage ........................................................................................ 24
6Return to manufacturer ................................................................................................. 24
7Disposal ......................................................................................................................... 24
8Imprint ........................................................................................................................... 24
9Declaration of Conformity .............................................................................................. 25
10 Notes ............................................................................................................................. 26

3
1 Intended use (areas of application)
Refer to the chapter 'Product description' for detailed specifications for
the area of application.
The operational safety of the device is only assured when used as in-
tended in accordance with the specifications in the operating manual.
Intervention beyond the actions described in the operating manual may only be car-
ried out by personnel authorised by the manufacturer for safety and warranty rea-
sons. Conversions or modifications made on one's own authority are expressly pro-
hibited.
Application-specific dangers can emanate from this device when used im-
properly or not as intended.
The device is intended for operation in safety-relevant systems up to
SIL2.
The device is not suitable for use in explosion-prone areas.
General safety instructions, use
This operating manual must be kept in a location such that qualified personnel can
refer to it at all times.
Any processes described in this operating manual may only be carried out by
trained, qualified personnel who are authorised by the owner and wearing protec-
tive clothing. All rights reserved.
1.1 Safety signs and symbols
Warning notices are identified in this document as described below:
DANGER
Warning! This symbol warns of imminent danger which can result
in death, severe bodily injury, or severe property damage in case
of non-observance.
Attention! This symbol warns of potential dangers or harmful situ-
ations which can cause damage to the device or to the environ-
ment in case of non-observance.
Note! This symbol indicates processes which can have a direct
influence on operation or can trigger an unforeseen reaction in
case of non-observance.
Warning! of an area in which explosive atmospheres can form.
This only applies to devices with ATEX approval.

GHM Group – Martens
GHM Messtechnik GmbH | Kiebitzhörn 18 | 22885 Barsbüttel | Germany
Phone [phone] | [email protected] | www.ghm-group.de
4
1.2 Safety instructions
Read the product description before commissioning the device. Ensure that there
are no limitations for use of the product for the relevant applications.
The owner is responsible for ensuring the fault-free operation of the de-
vice. The owner is obligated to ensure compliance and to observe the re-
quired work and safety measures of the current applicable regulations for
the entire duration of use.
1.3 Product liability and warranty
Exclusion of liability:
The contents of the operating manual have been checked to ensure conformity with
the described device. However, deviations cannot be entirely ruled out. Therefore,
we cannot assume any guarantee for complete conformity. The specifications in
this document are checked regularly and any necessary corrections are incorpo-
rated into subsequent versions. This document is subject to technical changes. In
addition, all claims are based on the valid 'Standard Terms for the Supply of Prod-
ucts and Services of the Electrical Industry'.
GHM Messtechnik cannot inspect or repair any devices without the re-
quired form having been filled in completely (see chapter 6 Return to
manufacturer, page 24).
1.4 Standards and directives
Conformity with Directive 2014/30/EU
CE conformity EN 61326-1: 2013
EN 61326-2-2: 2013
1.5 Approvals
EN 14597:2012 Temperature control devices and temperature limiters for
heat generating systems
EN 61508:2011 SIL2 Functional safety of electrical/electronic/programmable
electronic safety-related systems
DANGER

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2 Product description
The STL50 safety temperature limiter is used wherever thermal processes must be
monitored and the system must be switched to a safe operating state in case of a
fault. If the permissible temperature limit value is reached or an error occurs in the
monitoring device (probe break, probe short-circuit, failure of a component in the
device, error in the software, failure or impermissible value of the supply voltage,
etc.) within the permissible temperature range, the STL50 switches off immediately.
The alarm contact is confirmed, the front-side ALARM LED and the background
lighting of the display illuminate, and the cause of error is shown on the display in
plain text.
A 24 V DC signal for an external alarm is also connected to terminals 17-18.
2.1 Scope of delivery
 Safety temperature limiter STL50 with packaging
 This operating manual
2.2 Features
 Can be used as
STB Safety temperature limiter
ASTB Exhaust gas safety temperature limiter
STW Safety temperature monitor
 Certified according to EN 61508 SIL2
 Pt100 input, 3-wire connection or double thermocouple J, K, N and S
 Programmable temperature limit value and switching hysteresis
 Basic accuracy <0.5 %, ±2 digit
 Reaction time ≤ 0,5 s
 Alarm output 1 relay, SPDT
 Pre-alarm output 1 relay, SPDT
 Analog output 0/4 ... 20mA, 0/2 ... 10V
 Memory function for error message
 Operator lockout (password-protected)
 Case for TS35 DIN rail mounting

GHM Group – Martens
GHM Messtechnik GmbH | Kiebitzhörn 18 | 22885 Barsbüttel | Germany
Phone [phone] | [email protected] | www.ghm-group.de
6
2.3 Brief information
Programming The device is programmed with the buttons on the front
side in combination with the graphic display.
Operating modes The device can be used as:
STB → Maximum or minimum monitoring with catch
Manual reset after fault elimination by pressing the button
on the front side or an externally connected button
ASTB → like before, but with exhaust temperature monitoring
STW → Maximum or minimum monitoring without catch
Automatic reset after return to the permissible range
Switching hysteresis always acts towards a safe range.
Error buffer The last error is stored as plain text and can be viewed
and deleted on the working level.
Temperature probe:
With use of the device in accordance with DIN EN 14597, temperature
sensors that are approved in accordance with DIN EN 14597 must be
used!
2.4 Dimensions
Terminals 21 - 28
Terminals 11 -
Terminals 41 - 48
Terminals 31 - 38
DANGER

7
2.5 Connection diagrams
STL50-1-1R-X-00 STL50-5-1R-X-00
STL50-1-2RAO-X-00 STL50-5-2RAO-X-00

GHM Group – Martens
GHM Messtechnik GmbH | Kiebitzhörn 18 | 22885 Barsbüttel | Germany
Phone [phone] | [email protected] | www.ghm-group.de
8
2.6 Electrical installation
The device may only be installed by an electrician. Compliance with the
national and international regulations for installation of electrical and elec-
tronic systems applicable in the respective country of use is mandatory.
Pt100 input:
The resistance of 4 Ω per line must not be exceeded.
The corresponding line length for copper cable is specified in the table.
The values must be calculated for other line materials and cross-sections.
Maximum line length for copper lines
Line cross-section
Maximum line length
0.14 mm²
32 m
0.25 mm²
58 m
0.5 mm²
116 m
0.75 mm²
174 m
1 mm²
232 m
1.5 mm²
348 m
DANGER

9
3 Controls and functional description
3.1 Operating and display elements
3.2 Operation
The device is operated on 2 levels.
The desired parameter is opened with the button.
Selection within a parameter or adjustment of a value takes place with the and
buttons.
Button combinations (press buttons simultaneously):
+ 1 parameter back
+ parameter is set to “0” or minimum value
19.2°C
Pt100
Limit value 20.0°C
STB max.

GHM Group – Martens
GHM Messtechnik GmbH | Kiebitzhörn 18 | 22885 Barsbüttel | Germany
Phone [phone] | [email protected] | www.ghm-group.de
10
The device initialises after the supply voltage is connected. The device type and
software version appear in the display. After the device is finished initialising, it en-
ters the operating level and the current temperature and all safety-related settings
are displayed. The peak value buffer is displayed by briefly pressing the button.
The configuration level is displayed by pressing and holding the button for 2
seconds. All parameters determining the properties of the device are programmed
here. A password must be entered in order to enter the safety area of the configu-
ration level. If an incorrect password is entered, an error message appears in the
display. The device switches back to the operating level after this message or if no
password is entered. After an incorrect password has been entered three times, the
device enters a safety timeout for 60 minutes. The progress of this safety timeout is
shown in the display. The safety area is accessible with entry of the correct pass-
word. Settings can be made here, which must be protected from unauthorised
change. After the last menu item or if no button is pressed for more than 2 minutes,
the devices switches back to operating level automatically and the current meas-
urement is shown in the display. The configuration level can be exited at any times
by pressing the button for 2 seconds.
Error messages
If errors occur, the messages are shown in clear text on the display. This
simplifies troubleshooting.
Note for commissioning!
The device has standard preconfigured factory settings. Therefore, it
must be adapted to the specific application.
Service
Service of the device is only possible in the factory. Please refer to
chapter 6 Return to manufacturer on page 24.