Rotational Direction Monitor SAFEONE DN3PR1
The rotational direction monitor DN3PR1 does not require a measuring system nor external sensors and are therefore unique on the market in this way.
Thus, the innovative DN3PR1 is a good choice for retrofits as well as the most modern machines up to Performance Level e.
The simple installation and user-friendly parameterisation make safety a breeze. Just quickly configure the most essential parameters, since we have already done everything else for you.

Safe direction monitoring easier than ever.
For safe monitoring of three-phase asynchronous motors up to 690V AC with Performance Level e, it is not even necessary to parameterise the device. The module measures the frequency of the 3 motor phases as long as the drive is running. The output provides a signal when the drive moves in the preset, desired direction. However, the contact output opens immediately if the drive moves in a different, wrong direction, which breaks the circuit and stops the drive.
General Data
Operational Voltage UB | 24 V DC (-15/+10%) |
Power consumption at 24V | 80 mA |
Power input at A1/A2 | 1,9 W |
Protection (Case and Terminals) | IP20 |
Protection (Installation Site) | min. IP 54 |
Clearance and creepage distances between circuits | according to DIN EN 50178 |
Rated insulation voltage | 400V AC to Ground 690V AC Phase to Phase |
Rated impulse voltage / insulation | Basic insulation 6kV: between all current paths and enclosure Safe separation, reinforced insulation 8kV: between U, V, W and A1, A2, O1, O2, Q between U, V, W and 13/14, 23/24 |
Degree of contamination | 2 |
Surge voltage category | III |
Encasing material | Polyamide PA unreinforced |
Measurement | 422,5 x 114 x 111 mm (0.886 x 4.488 x 4.370 in) |
Input Data
Digital Inputs | 1 safety-related input Q |
Input voltage | 24V DC (-15/+10%) |
Inrush current | < 5,0 mA |
Power consumption | typ. 4 mA (at UB) |
Measurement Inputs | U, V, W |
Input voltage | 90V AC to 480V AC (Phase vs. Phase) |
Power consumption | 0,24mA at 480V AC |
Cut-off frequency | 1200Hz |
Rotational direction detection | >5Hz to 100Hz, two signalling periods |
Min. PWM | 1kHz |
Output Data
Signal outputs | O1, O2 not safety-related |
Voltage | UB – 1V |
Max. switching current | ≤ 100mA, short-circuit and overload proof |
Contact outputs | 13/14, 23/24 |
Contact Material | AgSnO2 |
Switching Voltage | 24V DC / 230V AC |
Min. Switching Voltage | 3 mA/ 24V DC |
Max. Switching Voltage | 6A / 24V DC / 230V AC |
Short-circuit resistance | 1000A SCPD 6A gL/gG |
Mechanical service life | 10^7 Schaltspiele |
Response time | 2 x (period duration (reciprocal of frequency) + max. 1ms evaluation time) + max. 10ms relay response time |
Process safety time | 1,8 s |
Output fuse | 6 A gL/gG |
B10d Values according to DIN EN 61810-2- 1, 01.2012 | 2AC15: 5A/230V AC, >2x105 switching cycles AC1: 6A/230V AC, >2x105 switching cycles DC13: 4A/24V DC, >3x105 switching cycles DC1: 6A/ 24V DC, >7x106 switching cycles |
Environmental Data
Operating Temperature | -20°C to +55°C |
Storage Temperature | -40 °C to +85 °C |
Max. Height for operating device | < 2000m above sea level |
Vibration | 10–150Hz, 1g |
Shock resistance | 15g |
Block circuit diagram
Sample Application
Measurement Inputs | The Measurement inputs U, V, W of the DN3PR1 are directly connected to the three phases of the motor M. |
Safe Switch Off | When the DN3PR1 detects a change of direction, the enabling current paths current paths 13/14, 23/24 open and switch off the motor in a safety-oriented manner, resetting the safety function |
Resetting the safety function | The S1 acknowledgement button is used to reset the safety function after the motor has turned in the preferred direction again the motor rotates in the preferred direction again. |
Monitoring of external Contactors |
The external, positively-driven contactors K1, K2 are integrated into the start circuit of the of the safety switchgear. |
Safety-relevant Parameters according to ISO 13849-1
Utilisation Category |
PFHd (h) | MTTFd (a) | DCavg |
6A DC1 2 Operations/h | 4,91 x 10^-9 | 471 | 99% |
4A DC13 2 Operations/h | 1,19 x 10^-8 | 203 | 99% |
6A AC1 2 Operations/h | 1,16 x 10^-8 | 157 | 99% |
5A AC15 2 Operations/h | 1,87 x 10^-8 | 157 | 99% |
Applications
- Three-phase motors with frequency inverter
- Servo motors
- Motors with star-delta connection
Sectors
- Woodworking
- Metalworks
- Construction
- Spindles
- Centrifuges
- and many more...
Your advantages summarised.
DN3P SAFEONE-Series
Cost-efficient
No external measurement systems equals less components, lower costs as well as faster Certification and Validation.
Be independent
Can be used on all three-phase and single-phase motors up to Performance Level e, regardless of supplier and system.
Fits into every cabinet
With an overall width of only 22,5 mm/0.9 in
Simple Configuration
Model-dependent via USB interface on the PC or directly via SET key. In the case of the direction of rotation monitor, no parameterisation is necessary at all.
Plug & Play
Easy to put into action without a great deal of prior knowledge. Integration into the circuit diagram is also very simple.
