3RH2140-1AB00
The Siemens SIRIUS 3RH2140-1AB00 is an S00 size contact relay with 4 normally open (4NO) contacts, an AC 24V 50/60Hz coil, and screw terminal connections. It is suitable for low-voltage control circuits supplied with AC 24V by a control transformer and is used for signal switching and amplification in control circuits.
Product Positioning
The 3RH2140-1AB00 is a basic 4-pole contact relay from the SIRIUS 3RH21 series. It uses an AC 24V 50/60Hz coil and screw terminals, making it suitable for low-voltage control circuits supplied with AC 24V by a control transformer. It can be used for PLC output expansion, interlocking control, and signal multiplication, and is a common intermediate relay choice in control panels.
Core Product Advantages and Features
4NO contact configuration
The device has four normally open instantaneous contacts, which can switch multiple control signals simultaneously to meet general interlocking and signal amplification requirements.
AC24V coil
AC 24V 50/60Hz coil, suitable for low-voltage control circuits supplied with AC 24V by a control transformer, eliminating the need for additional voltage conversion components.
Screw terminals
The screw terminal wiring is secure and suitable for general panel installation and future maintenance disconnection.
Expandable to 8 poles
The front can be fitted with a 3RH29 auxiliary switch, and up to 4 more contacts can be added. The number of control points can be expanded using the same relay.