Stop and guard
E-STOP and safety gates
One relay per function, evaluating a monitored stop command or a guard position with a defined reset behaviour.
ConfirmConfirm the function and contact requirement.
Safety relay
PNOZ X
The original safety relay, and still the direct answer when one clearly bounded function needs evaluating. PNOZ X uses voltage-free electromechanical contacts with two-relay technology, applied on the principle of one relay per safety function.
Electromechanical contacts2-relay technologyOne relay per safety function22.5 to 90 mm housingsUniversal power supply
22.5–90 mmHousing sizes
2-relayContact technology
Voltage-freeContact type
PNOZ XFamily range shown; device selected from the safety function
22.5–90 mmHousing size range
One per functionApplication principle
Plug-inSpring-loaded or screw terminals
UniversalPower supply flexibility
Why it is specified
PNOZ X selection rationale
The manufacturer lists reliability and sturdiness as the defining characteristics, alongside a wide product range and a strong price/performance ratio.
A device for every function
A wide range of product types for all safety functions, applied as one PNOZ X per safety function.
Fast commissioning
Plug-in terminals with spring-loaded or screw connections speed up the panel build.
Flexible supply
A universal power supply gives flexible application across installations with differing control voltages.
Proven and compact
Electromechanical, sturdy and compact, delivering maximum safety with low space requirement.
Applications
PNOZ X is used
The family covers the standard machine safety functions, and includes devices for specific tasks such as two-hand monitoring and muting.
Two-hand control
Two-hand monitoring
The range includes two-hand monitors for machines where the operator must use both hands to initiate the hazardous movement.
ConfirmConfirm the two-hand type required.
Muting
Material transport through a curtain
With the muting relay PMUT X1P and PSENopt devices, material can pass through the light curtain while operator access still raises a message to the control system.
ConfirmConfirm muting sensors and lamp monitoring.
Technical data
Selection parameters that matter
These are the characteristics that define the family. Contact configuration, timing and supply vary widely and belong to the selected order number.
frames the application principle plainly: use one PNOZ X per safety function.
| Contact technology | Voltage-free, electromechanical contacts with 2-relay technology |
|---|---|
| Application principle | One PNOZ X per safety function |
| Housing sizes | From 22.5 mm to 90 mm |
| Contacts | Number of contacts varies across the range |
| Terminals | Plug-in terminals with spring-loaded or screw connections |
| Power supply | Universal power supply for flexible application |
| Range | A wide range of product types covering all safety functions |
| Muting | The muting relay PMUT X1P supports connection of up to four muting sensors and monitoring of muting lamps |
| Two-hand | Two-hand monitors are available within the product range |
One relay per function keeps each function clear, but the device count grows quickly. Where several functions interact or diagnostics are needed, myPNOZ or PNOZmulti 2 usually becomes easier to maintain.
Models
Device selection within the family
The family is broad by design. These are the axes along which a specific device is chosen.
Function
Monitored safety function
The primary selection axis — E-STOP, guard, two-hand, muting or another defined function.
- Principle
- One per function
- Range
- Wide
Size
22.5 to 90 mm
Housing width follows the contact count and the function, and drives the panel layout.
- Minimum
- 22.5 mm
- Maximum
- 90 mm
Terminals
Spring-loaded or screw
Plug-in terminals in either termination style, chosen by the panel build standard.
- Type
- Plug-in
- Options
- Spring / screw
Muting
PMUT X1P
The muting relay used with PSENopt devices for material transport through a protective field.
- Sensors
- Up to 4
- Lamps
- Monitored
Accessories
Terminals, expansion and output stage
The relay commands a stopping element, and that circuit is as much part of the specification as the relay itself.
Terminals
Plug-in terminal sets
Spring-loaded or screw connections, selected to match the panel build standard rather than the relay.
ConfirmConfirm the preferred termination standard.
Muting
PMUT X1P and muting sensors
Up to four muting sensors can be connected, with muting lamp monitoring, alongside PSENopt protective devices.
ConfirmConfirm muting arrangement and sensor count.
Output stage
Contactors and feedback loop
The relay drives the stopping element; feedback loop monitoring of the contactors forms part of the function.
ConfirmConfirm stopping element and feedback arrangement.
Before quotation
Application review
A safety relay is selected from the function, the input device and the stopping element — never from the device name alone.
Safety function
- Which single function this relay will evaluate
- Single or dual channel input, and cross-fault detection
- Required performance or integrity level, if determined
- Whether a special device such as a two-hand or muting relay is needed
Input devices
- Type of input device and its contact or output arrangement
- Whether devices are connected in series and the fault-detection effect
- Cable lengths and connection method
- Existing devices being retained
Outputs
- Contact type, number of contacts and switching load
- Stopping element — contactors, drive input, valve or brake
- Whether feedback loop monitoring is required
- Required stop category
Panel and replacement
- Available panel width and terminal preference
- Supply voltage available
- Reset type and its position
- If replacing an existing relay, the old part number and circuit
Related technologies
PNOZ X sits in the architecture
The relay is the evaluation stage for one function. As functions multiply and begin to interact, a modular or configurable device usually becomes the better architecture.
Guard switches and E-STOP devices
PSENopt with PMUT X1P for muting
PNOZsigma where panel width is tight
myPNOZ for several linked functions
PNOZmulti 2 when diagnostics are needed
Contactors with feedback loop