Selection data of Pilz safety relay 751105

Selection data of Pilz safety relay 751105

Thermal dry spring relay is a new type of thermal switch that uses thermal sensitive magnetic materials to detect and control temperature. It consists of a temperature sensing magnetic ring, a constant magnetic ring, a reed switch, a heat-conducting mounting plate, a plastic substrate, and other accessories. Thermal dry spring relay does not require coil excitation, but is driven by the magnetic force generated by the constant magnetic ring to operate the switch. Whether the constant magnetic ring can provide magnetic force to the reed switch is determined by the temperature control characteristics of the temperature sensing magnetic ring.

PNOZsigma safety relay, input: single/dual channel wiring (with/without contact short circuit detection function), manual/automatic start, output: 2 N/O, 2 N/O t-d (t=0.04-300 s), 1 SC, UB=24 V DC, width: 22.5 mm, pluggable spring clamp terminal, monitoring emergency stop device, safety door, coating version.

The so-called 'safety relay' is not a 'relay', but a regular action taken when a fault occurs. It has a forced guiding contact structure, which can ensure safety even in the event of contact melting. This is different from general relays.

A safety relay is a necessary control component in a safety circuit, which receives safety inputs and outputs switch signals to the control circuit of the equipment by judging the internal circuit. Simply put, safety relays are of the dual channel signal type, and can only function properly when both channel signals are normal; During the working process, as long as any channel signal is disconnected, the safety relay will stop outputting until both channel signals are normal and reset before it can work normally.

A safety relay is composed of several relays and circuits, designed to complement each other's abnormal defects and achieve the complete function of a correct and low misoperation relay. The lower the error and failure values, the higher the safety factor. Therefore, multiple safety relays need to be designed to protect machinery of different levels, with the main goal of protecting machinery operators exposed to different levels of danger.

Dualization is necessary, but in addition, there are several conditions such as mutual inspection of the dual circuit, confirmation that all safety circuits have been disconnected once, and if necessary, it can be started by the operator. From another perspective, when there is a possibility of grounding caused by a short circuit in the input switch wiring or damage to the wire sheath, it is necessary to prevent sudden machine start-up caused by this.

In fact, in order to facilitate the composition of safety circuits, products that combine safety relays with other components and form basic emergency stop circuits and safety circuits into circuit modules are called safety relay modules.

Selection data of Pilz safety relay 751105