Setup
Adjustment at reduced speed
Threading, format change and adjustment need the machine to move while someone is close to it, at a speed proven to be within the safe limit.
ConfirmConfirm the safe speed threshold and enabling arrangement.
Safe speed monitor
PNOZ s30
Switching off is not always the safest response. Where an operator must observe, thread or adjust while a machine moves, the movement itself has to be monitored — and PNOZ s30 does that independently of the drive, which is what makes it work on retrofits and mixed drive brands.
Speed, standstill, position, directionSafety functions to EN 61800-5-2Illuminated displayPNOZsigma ConfiguratorUp to PL e / SIL CL 3
PL eEN ISO 13849-1
SIL CL 3EN IEC 62061
EN 61800-5-2Safety functions
PNOZ s30Stand-alone speed monitor with drive feedback
PL eEN ISO 13849-1
SIL CL 3EN IEC 62061
SSRSLS combined with SSM
EN 81-20/50Usable in lifts
Why it is specified
Independent monitoring provides
The device watches the drive rather than trusting it, which is exactly what is needed when the drive itself offers no rated safe function.
Independent of the drive
A stand-alone monitor suits retrofits, mixed drive brands and drives without rated safe functions.
Configured on the device or in software
Parameter entry and diagnostics via an illuminated display, or configuration with the PNOZsigma Configurator.
Advance warning before shutdown
The manufacturer lists advance warning of shutdown when a defined threshold is reached, so production can react before the stop.
Standard motion functions
Safety functions implemented in accordance with EN 61800-5-2, using the recognised function names.
Applications
PNOZ s30 is used
Speed and standstill monitoring is normally introduced to allow controlled access, rather than to add another way of stopping the machine.
Guard release
Standstill before access
Rather than releasing a guard on a timer, the guard stays locked until standstill is actually monitored, which removes the guesswork from long run-down.
ConfirmConfirm run-down time and the locking device.
Directional hazard
Movement in one direction only
Where the hazard exists in one direction, monitoring direction of rotation allows productive movement while the dangerous direction stays blocked.
ConfirmConfirm which direction is hazardous.
Technical data
Selection parameters that matter
These are the values that decide whether the monitor suits the drive and the application. Feedback compatibility must be confirmed for the specific installation.
The manufacturer states the standards EN ISO 13849-1 up to PL e and EN IEC 62061 up to SIL CL 3 are met, with safety functions implemented in accordance with EN 61800-5-2.
| Monitored quantities | Speed, standstill, position and direction of rotation |
|---|---|
| Additional monitoring | Speed range monitoring and broken shear pin monitoring on drives |
| Performance level | EN ISO 13849-1 up to PL e |
| Integrity level | EN IEC 62061 up to SIL CL 3 |
| Safety functions | Implemented in accordance with EN 61800-5-2 |
| Safe speed range (SSR) | Combination of Safely limited speed (SLS) and Safe speed monitor (SSM) |
| Configuration | PNOZsigma Configurator, or directly on the device via the illuminated display |
| Diagnostics | Parameter entry and diagnostic messages shown on the illuminated display |
| Contact expansion | PNOZ s22 |
| Further functions | Advance warning of shutdown at a defined threshold; auto reset when switching parameter sets; synchronous start for all outputs; non-retriggerable off delay time |
| Lifts | Can be used in lifts in accordance with EN 81-20 / EN 81-50 |
The monitor needs a feedback system. Encoder or sensor type, resolution, signal, cabling and diagnostic coverage must be verified for the drive in question before the function can be credited.
Models
Configuration and expansion
The device is configured rather than ordered in variants, so the decisions are about function, feedback and outputs.
Function
Monitored quantity
Speed, standstill, position, direction or speed range — selected from what the application actually requires.
- Standard
- EN 61800-5-2
- Range
- SSR = SLS + SSM
Configuration
Display or Configurator
Parameters can be entered on the illuminated display, or the device configured with the PNOZsigma Configurator.
- On device
- Display
- Software
- Configurator
Expansion
PNOZ s22
Contact expansion where more output contacts are required than the monitor itself provides.
- Device
- PNOZ s22
- Purpose
- Contacts
Sector
Lift applications
The manufacturer states the device can be used in lifts in accordance with EN 81-20 and EN 81-50.
- EN 81-20
- Lifts
- EN 81-50
- Examinations
Accessories
Feedback, expansion and interlocks
A speed monitor is never specified alone — the feedback system and what the output interlocks are both part of the decision.
Feedback
Encoder or sensor
The monitor requires a feedback system; type, resolution, signal and cabling must be compatible and diagnostically adequate.
ConfirmConfirm the existing feedback device and its signal.
Expansion
PNOZ s22 contact expansion
Adds output contacts where the monitor alone does not provide enough for the stopping elements involved.
ConfirmConfirm the number of output circuits required.
Interlock
Guard locking device
Standstill monitoring is commonly interlocked with guard locking so the guard releases on proven standstill rather than a timer.
Typical pairingPSENmlock guard locking.
Before quotation
Application review
Safe motion depends on mechanical facts as much as electrical ones. Without these the function cannot be sized or validated.
Motion function
- Which function is required — standstill, limited speed, direction or position
- The safe threshold and its tolerance
- Whether the function applies in all modes or only in setup
- Target performance or integrity level, if determined
Drive and feedback
- Drive manufacturer, model and firmware
- Whether the drive already offers rated safe functions
- Encoder or sensor type, resolution, signal and cabling
- Whether a second, diverse feedback source is required
Mechanics
- Measured run-down time and distance from operating speed
- Load, inertia and whether the axis is gravity loaded
- Whether a brake forms part of the safety function
- Total reaction time from detection to safe state
Access and operation
- How access during monitored movement is granted
- Whether an enabling device is required
- Operating-mode selection and how modes are secured
- Validation evidence required per mode
Related technologies
PNOZ s30 sits in the architecture
Feedback, evaluation, the drive response and any mechanical brake all sit inside the safety function. The calculated reaction time must include every one of them.
Encoder or sensor feedback
PNOZ s22 for contact expansion
PSENmlock released on standstill
Enabling device for setup mode
PITmode for operating-mode selection
PNOZ s50 for safe brake control
