Rotational Direction Monitor
SAFEONE DN3PR1

The SAFEONE DN3PR1 is a safety switching device for sensorless monitoring of the direction of rotation of three-phase asynchronous motors. The device measures the frequency of the rotating field on the motor and evaluates the direction of rotation based on the phase position of the motor drive voltage. The module complies with the certified performance level e or SIL 3.

Sensorless

No parameterisation necessary

Fits in every switch cabinet

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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 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

Plug & Play

Quick and easy commissioning without sensor wiring.

Features

8-1 9-3 10-3 11-3 12-2 Ple Merkmal EN SIL 3 Merkmal EN

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 consumptione	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, 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 switching cycles
Response time	2 x (period duration (reciprocal of frequency) + max. 1ms evaluation time) + max. 10ms relay response time
Process safety timet	1,8 s
Output fuse	6 A gL/gG
B10d Values according to DIN EN 61810-2- 1, 01.2012	AC15: 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

SAFEONE_DN3PD2_Blockschaltbild

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.

SAFEONE_DN3PD2_Applikationsbeispiel_neu

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%