3RH2140-1JB40
The Siemens SIRIUS 3RH2140-1JB40 is an S00 coupled contact relay with 4 normally open contacts, a DC 24V coil, a coil operating range of 0.7–1.25 × Us, a built-in diode, screw terminal connection, and is designed for direct drive of PLC outputs.
Product Positioning
The 3RH2140-1JB40 is a SIRIUS 3RH21 coupling contact relay designed for electronic controllers and PLC outputs. The coil operating range is 0.7–1.25 × Us, and it can tolerate DC power supply voltage fluctuations. It has a built-in diode and uses screw terminals, and is commonly used for signal isolation and amplification between PLCs and field loads.
Core Product Advantages and Features
Expand the operating range of the coil
The coil has an operating range of 0.7–1.25 × Us, which is more tolerant of DC power fluctuations than the standard type, and its operation is stable and reliable.
Built-in diode in coil
The coil has an integrated diode, which can absorb the surge voltage during power failure and protect the PLC output point and surrounding electronic modules.
Low coil power consumption
At 24V, the coil power is approximately 2.8W, and it can be directly driven by the PLC transistor output point without the need for additional intermediate components.
Screw terminals
The screw terminal wiring is secure and suitable for general panel installation and future maintenance disconnection.