GHM Martens GS125L, Руководство по эксплуатации

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Limit switch GS125
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 voltage, 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 adjustment scales which are illuminated
red or green depending on the switching status also enable operation in dark environments
Scope of Delivery
- GS125, according to order code
- 24 transparent labels with measuring units and scale assignment
- Power Rail DIN rail adapter (only with LP version)
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these operating instructions
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if necessary, further documents
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 contacts 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
analogue output that reproduces the respective input signal to 4-20mA. The analogue 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.