What is K1 K2 in safety relay?
Two relays (K1, K2) with positive-guided contacts provide the safe switching contacts. The device is designed in such a way that any faults in the input circuit are detected, e.g. contact welding on an emergency off/emergency stop pushbutton or on one of the safety contacts on the output relay.
What is a Pilz safety relay?
The safety relays PNOZ monitor safety functions such as emergency stop, safety gates, light barriers, light curtains, two-hand controls, speed, standstill and much more besides. In 1987 Pilz patented the first emergency stop relay to protect man and machine. That was a milestone in safety technology.
What is manual reset?
A manual reset is when there is a reset switch in the feedback circuit and the device does not start when the input turns ON unless the reset switch is pressed. A manual reset is used for machines that people can enter and for emergency stop circuits, and an auto reset is used for machines that people cannot enter.
What is K1 and K2 in electronics?
The safety reset button is wired to K1. The 2-pole emergency stop button contacts are wired to K2 and K3. On power on (to A1/A2) all relays are de-energised. Pressing RESET will energise K1.
What is K1 electrical?
Simple relay / starter circuit K1 – relay / starter ~ 220 V AC with 4 normally open contacts. SB1 – “Start” button with 1 normally open contact. SB2 – “Stop” button with 1 normally closed contact.
How does a Pilz unit work?
The device is designed in such a way that any faults in the input circuit are detected, e.g. contact welding on an emergency stop pushbutton or on one of the safety contacts on the output relay. The safety device stops the device switching back on and thereby stops the activation of relays K1 and K2.
When should I use a safety relay?
In the event of a hazard, a safety relay will work to reduce to risk to an acceptable level. When an error occurs, the safety relay will initiate a safe and reliable response. Each safety relay monitors a specific function.