Coupling Relays and Signal Converters When standard controllers with their standard inputs/outputs reach their limits, coupling relays and interface converters come into their own. A wide selection of coupling relays and interface converters is available for the electrical isolation of I/Os and PLC inputs and outputs, signal amplification or reproduction as well as conversion to different voltage levels or signal forms. We offer the appropriate solution for all requirements.
Coupling Relays (3RQ3)
Slim + Compact
For optimum use of space in the control cabinet
6.2 mm width / requires little space on the DIN rail
Interface Converters (3RS70)
For analog standard and universal signals
For analog signal transmission to a PLC
Measuring instruments in a control cabinet door ++
Coupling Relays (3RS18)
With wide voltage range
Coupling relays (3RS18) are unique
For wide-range 24-240V AC/DC
For world wide use
In industrial housing
Power Relays (3TG10)
Solution for performance range below S00
For confined spaces (width only 36 mm)
Flexible installation/ position independent
For switching large loads: high power rating (20A/400V AC) ++
We offer a diverse range of coupling technology for electrical isolation, amplification and signal adjustment between the controller and I/O. Thanks to their wide voltage supply range, the coupling relays can be used worldwide without any problems. With their new titanium gray design, the slim SIRIUS 3RQ3 devices present a uniform look that matches that of other SIEMENS switching devices in the control cabinet.
The 3TG10 power relays come as the ideal solution for all applications requiring small, low-noise relays or contactors at low costs. The power relays are suitable for basic controls and particularly for use in large-scale series devices and controls. They are ideal for applications which require only one auxiliary contact and no overload relay – and place increased requirements upon switching capacity, switching voltage and service life.
3RS7 interface converters are mainly used to electrically isolate and convert analog signals. Sensors/actuators and controls generally have different power supply units, and therefore require electrical isolation in the signal circuit. This is either integrated in the control or is implemented using an interface converter. A signal has to be converted into another signal if, for instance, a voltage signal needs to be converted for transmission over a long distance into a current signal, or if the output of a sensor and the input of a control are not compatible with one another. The frequency outputs implemented offer a further application. In this case, the input signal is converted into a proportional frequency. This means that analog signals can be processed with digital inputs. This is important if the control does not have provision for an analog input, or if all of its analog inputs are already assigned, e.g. when devices are retrofitted.