Limit value switch

GS125

Limit value switch for process monitoring with universal inputs for 0/2..10 V, 0/4..20 mA, Pt100, thermocouples and potentiometers, 1 or 2 relay outputs, 4..20 mA actual value output and 12.5 mm housing.

Introduction

Tight switch cabinet space should not limit how reliably a process is monitored. This compact limit value switch monitors one or two limit values from temperature and derived control signals, with universal inputs for voltage, current, Pt100, thermocouples and potentiometers.
 
Configuration via front-side DIP switches keeps commissioning clear, while illuminated adjustment wheels show the relay status directly in red or green. The 12.5 mm housing supports space-saving TS35 carrier rail mounting, and removable coded terminals make installation structured inside the cabinet.
 
For flexible switching tasks, versions are available with one relay, two relays in universal connection, or two potential-free normally open contacts. An optional 4..20 mA actual value output reproduces the input signal, and wide-range power supply versions cover 20..125 V DC or 20..250 V AC. Functional safety up to SIL2 in accordance with EN61508 supports dependable integration.

Cabinet space saved
Cabinet space saved
12.5 mm housing enables compact TS35 carrier rail mounting
Flexible signal input
Flexible signal input
DIP-switch input for 0/2..10 V, 0/4..20 mA, Pt100, thermocouples and potentiometers
Clear relay status
Clear relay status
Illuminated scales change red or green depending on the switching status
Safety integration
Safety integration
Functional safety up to SIL2 in accordance with EN61508

Features

Universal input configuration

The measuring input is selected via front-side DIP switches. Supported signals include voltage, current, Pt100, thermocouples and potentiometers.

Limit value contacts

Device versions provide one changeover relay, two relays with universal connection, or two potential-free normally open contacts for different switching circuits.

Min-max contact function

The relay switching behavior can be set as a minimum or maximum contact via DIP switches on the front of the device.

Actual value output

Versions with analog output reproduce the respective input signal as 4..20 mA. The output is not galvanically isolated from the input signal.

Illuminated adjustment wheels

 Limit values are set with front control wheels. The scale illumination serves as an operating indicator for relay state.

Fault monitoring

The device monitors sensor break, short circuit and measuring range (input type depending). In fault cases, the relays become inactive.

Power supply versions

Device versions are available for 24 V DC, 24 V DC with Power Rail connection, or wide-range supply of 20..125 V DC and 20..250 V AC.

Carrier rail installation

The housing mounts on TS35 carrier rail and uses removable coded terminals. Push-in terminals are available as an option.