GHM-Martens GS125 User manual

English
Operating manual
Limit switch
GS125
Ventures / brands of
GHM
www.ghm-messtechnik.de
Keep for future reference.

GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
2
able of contents Page
1. Intended 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
2. Product description .......................................................................................... 5
2.1. Scope of delivery ...................................................................................... 5
2.2. Functional principle .................................................................................. 6
2.3. Connection diagram ................................................................................. 7
2.4. Limit value contacts .................................................................................. 8
2.5. PowerRail ................................................................................................. 9
2.6. Positioning of the adhesive labels with measuring units ........................ 10
2.7. Type plate .............................................................................................. 10
3. Assembly and installation .............................................................................. 11
3.1. Mechanical assembly ............................................................................. 11
3.2. Electrical installation ............................................................................... 11
4. Controls and functional description ............................................................. 12
5. Commissioning, maintenance and service .................................................. 14
5.1 Commissioning ....................................................................................... 14
5.2 Maintenance ........................................................................................... 14
5.3 Service ................................................................................................... 14
6. echnical data ................................................................................................. 15
6.1 Mechanical design / dimensions ............................................................ 17
7. Order code ....................................................................................................... 18
8. Device transport and storage ........................................................................ 18
9. Return to manufacturer .................................................................................. 19
10. Disposal ........................................................................................................... 19
11 Imprint .............................................................................................................. 19
12. Certificate of conformity ................................................................................. 20

GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
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 improperly or
not as intended.
Application-specific dangers can emanate from this device when used
improperly or not as intended.
The device is not intended 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 under Table 1:
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 sit-
uations which can cause damage to the device or to the envi-
ronment 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.
Danger

GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
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
device. The owner is obligated to ensure compliance and to observe
the required work and safety measures of the current applicable regu-
lations 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
required form having been filled in completely (see chapter 'Returns').
1.4 Standards and directives
Low-voltage Directive 2014/35/EU
Testing standard 60664-1: 2007
EMC Directive 2014/30/EU
Testing standard EN 61326-1: 2013
RoHS Directive 2011/65/EU
Testing standard EN50581: 2012
Functional safety
Testing standards EN61508-1: 2010
(Issue years for testing standards belong to german versions)
DANGER


GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
5
2. Product description
Limit switches of the series GS125 are used in switch cabinets for process monitoring
or even for simple process regulation. Temperatures and derived signals such as volt-
age, current and resistance can be used as control signals. In the process, 1 or 2 limit
values can be monitored. With the universal configurability of the measuring inputs, the
need to stock multiple parts for various applications is reduced. The housing width of
only 12.5mm allows space-saving installation in the switch cabinet. The limit value ad-
justment scales which are illuminated red or green depending on the switching status
also enable operation in dark environments.
2.1. Scope of delivery
• GS125
• 24 transparent labels with measurement units and scale assignment
• This operating manual
• Additional documents, if applicable
2 relay contacts in universal circuit 2 potential-free NO contacts
Supply volt
a
ge
Supply volt
a
ge

GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
6
2.2. Functional principle
One or two relays may be switched depending on the measurement at the device
input.
Limit values can be adjusted with illuminated adjustment wheels. When the limit
values are reached (depending on the input signal), relays are switched.
The relay status is indicated by a colour change in the scales of the adjustment
wheels.
The switching behaviour of the relay can be specified as a minimum or maximum
contact.
Device configuration will be done via DIP switches.
The relay is designed as a changeover contact for single-channel devices.
Two-channel devices can be optionally supplied with a universal connection of the
relay contacts or with two potential-free NO contacts.
The universal connection enables use of the device with 2 independent NO con-
tacts or in window range monitoring in which the two contact relays can be open or
closed within the target range.
The application is selected with the wiring of the outer connection terminals.
A device version is available with analog output that reproduces the respective in-
put signal to 4-20mA. The analog output is not galvanically isolated from the input
signal!
The device may be supplied in a wide range between 20..125V DC or 20..253V AC.
A low cost version with 24V DC power supply is available.
Another version allows a 24V power supply via a mounting rail bus (Power Rail)
Twenty-four transparent adhesive labels are provided for assigning the unit of
measure for the scale labelling. They can be affixed between the adjustment
wheels on the front panel, depending on requirements.

GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
7
2.3. Connection diagram
Input signals should be connected via separate 2 or 3 core cables.
Grounded leads may cause problems with the not galvanical isolated
analog true value output.

rue value output
Multisignal inputs

GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
8
2.4. Limit value contacts

GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
9
2.5. PowerRail
The supply of multiple devices can be combined and simplified via a bus system
in the carrier rail (TS35).
An equivalent version is available for the entire LP series of GHM carrier rail
devices in 12.5mm wide housing.
Before mounting the device to be supplied, a series-compatible bus adapter must
be connected on the carrier rail.
For this purpose, an adapter piece is required for each device. The supply of the
bus then takes place via a plug-in terminal strip.
In the device version GS125LP provided for this purpose, the supply terminals 11
and 12 on the upper side of the device are omitted.

GHM Messtechnik GmbH
–
Location
Martens
Kiebitzh rn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [email protected]
10
2.6. Positioning of the adhesive labels with measuring units
2.7. ype plate
The type plate contains the most important identification data
● Type and article designation
● Technical data
● Serial number / bar code
Fig. 3: Type plate