Germany PILZ monitoring relay

1、 Core positioning (model: PNOZ XV2 300/24VDC, 774508)

PILZ dual channel safety monitoring relay+ultra long delay power-off (0-300s), featuring emergency stop/safety door monitoring+safety delay shutdown, meeting PL e/SIL 3 safety level.

2、 Main functions

1. Security monitoring (core)

-Dual channel input: S11-S12, S21-S22, supporting emergency stop button, safety door, and safety grating monitoring

-Short circuit/wire breakage detection: dual channel mutual inspection, preventing contact adhesion and line faults

-Reset mode: automatic reset/manual reset optional

-Self monitoring: Internal redundancy self check, forcibly cutting off safety output in case of failure

2. Delay function (biggest highlight)

-Delay type: OFF delay - the delay contact is only released after the safety circuit is disconnected

-Delay range: 0-300s (adjustable in multiple levels: 0.3S/5s/10s/20s/40s/60s/80s/100s/150s/200s/250s/300s)

-Delay contacts: 2 sets of delayed safety contacts (2n/o t), independent of instantaneous contacts

3. Output configuration

-Instantaneous safety output: 2n/o (13-14, 23-24) - immediately close when the safety circuit is normal

-Delayed safety output: 2n/o t (33-34, 43-44) - delayed release after safety circuit disconnection

-Contact capability: 8A/240VAC, 8A/24VDC, resistive load

3、 Key technical parameters

- 型号： PNOZ XV2 300/24VDC 2n/o 2n/o t（774508）

-Power supply: 24VDC (20.4-26.4V), power consumption of approximately 4.5W

-Input: 2-channel, contact type, with short circuit detection

-Delay: 0-300s, adjustable in multiple levels

-Output: 2n/o (instantaneous)+2n/o t (delayed), 8A/240VAC

-Safety level: PL e (Cat. 4), SIL 3

-Certification: CE, cULus, T Ü V, CCC

-Dimensions: 45mm (width) x 87mm (height) x 121mm (depth), DIN rail installation

-Terminal: Screw connection

4、 Typical application scenarios

1. Emergency stop+delayed shutdown

-Large machine tools, injection molding machines, and packaging machinery: After the emergency stop is triggered, the main power supply (instantaneous contact) is cut off first, and the auxiliary circuit/braking circuit is cut off after a delay of 30-300 seconds to ensure that the inertial motion stops

-Robot/Automation Line: Delayed release of servo brake after emergency stop to avoid emergency stop impact

2. Safety door+delayed release

-When the protective door is opened, the instantaneous contact cuts off the power; Delay the contact by 10-60 seconds before cutting off the cooling/lubrication/hydraulic system to protect the equipment

-Production line safety door: delayed shutdown after opening to avoid material jamming

3. Safety grating+delay

-Stop immediately when the grating is obstructed; Delay the contact point and then cut off the auxiliary circuit, suitable for long process equipment

4. Special delay requirements

-Metallurgy/lifting/large fan: 0-300s ultra long delay, meeting the safety shutdown timing of heavy equipment

5、 Core advantages

-Ultra long latency: 0-300s, covering the vast majority of industrial latency requirements

-High safety level: PL e/SIL 3, dual channel+self-monitoring, safe and reliable

-Independent delay contact: 2 sets of delay+2 sets of instantaneous, flexible adaptation to complex timing

-Wide adaptation: single/dual channel, automatic/manual reset, compatible with various safety inputs

-Industrial grade: DIN rail, screw terminal, strong anti-interference, suitable for harsh working conditions

The working principle of the German Pilz safety relay is an electronic component that converts an input signal into one or more output signals.

The working principle of a Pilz safety relay is an electronic component that converts an input signal into one or more output signals. Its input signal is the power on or off of the coil. Its output is the action of the contacts (normally open point closed, normally closed point open), and its contacts are connected to other control circuits. Changes in the contacts cause changes in the control circuit (such as conduction or cutoff), thereby achieving the predetermined control or protection purpose. During this process, the relay mainly plays a role in transmitting signals

The principle characteristics and functions of the German Pilz safety relay are as follows:

Working principle: The working principle of safety relays involves different classifications, such as electromagnetic safety relays and thermal dry spring safety relays, which may use different principles.

Electromagnetic safety relay: generally composed of iron core, coil, armature, contact spring, etc. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, thereby generating electromagnetic effects. The armature will overcome the pulling force of the return spring and be attracted to the iron core under the electromagnetic force, thereby driving the moving contact (normally open contact) and the stationary contact (normally closed contact) of the armature to be attracted. When the coil is powered off, the electromagnetic attraction also disappears, and the armature will return to its original position under the reaction force of the spring, releasing the moving contact and the original static contact. This suction and release achieves the purpose of conduction and disconnection in the circuit.

Thermal dry spring safety relay: 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.

Function: The Pilz safety relay itself is not an ordinary relay, it has a forced guiding contact structure, which can ensure safety in case of contact melting phenomenon.

When the emergency stop is released, the machine cannot suddenly restart.

In case of a malfunction in the safety circuit of the machine, the power supply of the machine can be stopped.

When the safety circuit fails, the machine cannot start inputs such as safety switches and light curtains to confirm safety, and cannot achieve the above functions.

Characteristic: The characteristic of the German Pilz safety relay is that it is an electrical device that causes a predetermined step change in the controlled variable in the electrical output circuit when the change in input quantity (excitation quantity) meets the specified requirements. Usually used in automation control circuits, it is actually an automatic switch that uses low current to control high current operation.

In summary, the principle characteristics and functions of the German Pilz safety relay are mainly reflected in its design and functionality, making it play an important role in ensuring circuit safety.