DatasheetDynisco Guardian Series Pressure Sensors for Safety Control
The Dynisco Guardian Series enhances proven Dynisco pressure sensors with an integrated relay circuit for additional safety and compatibility with safety-related machinery requirements. The sensors meet requirements according to EN ISO 13849-1 and provide Performance Level “c” or “d” as well as NFPA 79 requirements for pressure sensors, without the need for redundant sensors or a separate relay module.
According to EN ISO 13849-1, a pressure sensor is considered a machine component when it is used as part of a safety function in a machine. Guardian sensors enable monitoring of an adjustable pressure threshold and provide a relay output signal when the defined pressure condition is exceeded. This allows the signal to be integrated directly into a safety function to support a safe operating state of the machine.
The Guardian Series has been self-certified based on test reports and FMEDA analyses performed by the independent agency exida™. Single sensors meet Performance Level “c” according to the Machinery Directive without the need for redundant sensors. Performance Level “d” can be achieved when two Guardian sensors are installed in a Category 3 configuration. The Guardian option is available for many Dynisco sensor types and can be ordered as an option code at the end of the respective model code.
| Type | Pressure sensors with integrated safety and relay switching function |
|---|---|
| Series | Dynisco Guardian Series |
| Application | Safety control, pressure monitoring and safety-related machinery functions |
| Reference standards and directives | EN ISO 13849-1, Machinery Directive 2006/42/EC, NFPA 79, EMC Directive 2004/108/EC, PED 97/23/EC |
| Performance Level “c” | Achievable with a single sensor when installed according to Category 1 |
| Performance Level “d” | Achievable with two sensors when installed according to Category 3 |
| Certification basis | Analysis by the independent agency exida™ based on FMEDA analysis and internal verification |
| Relay function | Integrated relay circuit for additional safety |
| Relay state during normal operation | Contact is closed under normal operating conditions |
| Relay contact opens under the following fault conditions | Open back detected | Sensor power failure | Pressure exceeds the relay threshold value defined by the customer |
| Max. switching voltage | 200 VDC; 200 VAC peak |
| Max. switching current | 0.5 A |
| Max. direct current | 1.0 A |
| Guardian ordering option | Option code at the end of the product model code, e.g. PT-XX-XXX-XX-XXX |
| Option logic | GCx: Performance Level “c” according to EN ISO 13849-1; “x” represents the relay threshold value in % of the full pressure range |
| Relay threshold value | Selectable in 10 % increments from 10 % to 100 % of the full pressure range |
| Example option code | GC9: PL “c” with a relay switching threshold of 90 % of the full pressure range |
| Electrical connection | 6-pin Bendix connector or equivalent |
| Available output signals | mV/V, 4…20 mA and mA-HART, depending on sensor model |
| Examples of compatible sensor models | SPX 2xxx, SPX 3xxx, SPX 4xxx, SPX 5xxx, DYNA4, DYN-X, MDA410, MDA420, MDA460, PT410, PT415, PT418, PT420, PT435A, PT450, PT460E, PT460XL, PT462E-M10, PT465XL, PT467E, PT467E-M10, PT467XL, PT480, TPT, TDA |
| User responsibility | The user is responsible for integrating the relay into the machine in such a way that a safe operating state is restored when the relay opens. |
| Calibration responsibility | The user is responsible for fulfilling proof-of-use requirements and recalibrating the sensors annually. |
| Key features | Integrated relay circuit, adjustable pressure threshold, safety rating according to EN ISO 13849-1, no additional redundant sensors or external relay modules required for PL “c” |
