Pilz PU3Z Data Sheet

Safe monitoring relays

Voltage

PU3Z

Voltage monitoring relay for the safe
monitoring of 3-phase supplies

Approvals

PU3Z





Unit features

` Positive-guided relay outputs:

– 3 safety contacts (N/O), instanta-

neous

– 1 auxiliary contact (N/C), instan-

taneous

` 6 semiconductor outputs
` LED indicator for:

– Supply voltage
– Semiconductor output
– Status of measuring circuit

` Semiconductor outputs signal:

– Status of measuring circuit

` See order reference for unit types

Unit description

The voltage monitoring relay operates
as a device for the safe monitoring of
3-phase supplies. The unit meets the
requirements of EN 945-1 up to Cate­gory 4. It may be used with

` safety circuits in accordance with

VDE 0113 and EN 60204-1 (e.g. on
movable guards)

Safety features

The relay meets the following safety
requirements:

` The circuit is redundant with built-in

self-monitoring.

` The safety function remains effec-

tive in the case of a component fail­ure.

` The correct opening and closing of

the safety function relays is tested
automatically in each on-off cycle.

` The unit has an electronic fuse.

Block diagram

A1 A2

~

Power



S33 S34

Reset/

Start

=

0 V 24 V

0V 24V Y41 Y42

Y4 Y5

Input

N N*

Input

Y43 Y44 Y45 Y46

L1 L1*

N

Input

L2 L2* L3 L3*

L1

L2

Input

Feed-

back

Y1 Y2 FAULT

13 23 33 41

L3

Input

K1

K2

14 24 34 42

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-243-2006-11

Safe monitoring relays

Voltage

PU3Z

Function description

` Automatic reset: Unit is active once

the input circuit has been closed.

` Manual reset: Unit is active once

the input circuit is closed and then
the reset circuit is closed.

` Self test: An internal self test is car-

ried out during initial commission-

voltage is switched off and on. The
process simulates switching all
measuring voltages on and then off
again. Provided no error occurs
during the self test, the unit will then
be ready for operation.

` Increase in the number of safety

contacts available by connecting
external contactors.

` The unit operates as a threshold

switch. The switching thresholds of
the three phase voltages L1, L2, L3
are 10 V and 110 VAC / 64 VAC
when measured against the neutral
conductor N.The status of the
measuring circuit is displayed via
the semiconductor outputs and the
relevant LEDs:

ing and each time the supply

Measuring voltage Semiconductor LED

L1 – L2 Y41 VL1-L2 (Y41)
L2 – L3 Y42 VL2-L3 (Y42)
L1 – L3 Y43 VL1-L3 (Y43)
L1 – N Y44 VL1-N (Y44)
L2 – N Y45 VL2-N (Y45)
L3 – N Y46 VL3-N (Y46)

Timing diagram

POWER

Input

110 (64 V AC)

U1 ... U6

Output semi FAULT

Voltage Hazard
Detection

10 V AC

0 V AC

Output safe
Output aux

Output semi

System Fault

Key

` Power: Supply voltage
` Input: Input circuitY4-Y5
` U1 ... U6: Phase voltages on the

measuring circuit L1-L1*, L2-L2*,
L3-L3*, N-N*

` Output safe: Safety contacts 13-14,

23-24, 33-34

` Output aux: Auxiliary contacts 41-

42

Wiring

` Output semi: Semiconductor out-

puts Y41, Y42, Y43, Y44, Y45, Y46
indicate the status of the measuring
circuit

` Voltage Hazard Detection: LED

lights when there is a measuring
voltage of >10 VAC, although the
input circuit is closed

` System Fault: LED on: Open circuit

on at least one measuring circuit or
internal error

` Output semi FAULT: "FAULT" sem-

iconductor conducts when a "Volt­age Hazard Detection" error or
"System Fault" occurs

Please note:

` Information given in the “Technical

details” must be followed.

Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

` Outputs 13-14, 23-24, 33-34 are in-

stantaneous safety contacts, out­puts are delay-on de-energisation

safety contacts, output 41-42 is an
instantaneous auxiliary contact
(e.g. for display).

NSG-D-2-243-2006-11Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

-2

Safe monitoring relays

Voltage

PU3Z

` To prevent contact welding, a fuse

should be connected before the
output contacts (see technical de­tails).

` Use copper wire that can withstand

60/75 °C.

` Sufficient fuse protection must be

provided on all output contacts with
capacitive and inductive loads.

` To meet the requirements of the

safety circuits, separate wires in
separate multicore cables must be
used for the measuring voltages L1,
L2, L3, N and the measuring voltag­es L1*, L2*, L3*, N*.

` Connect the measuring voltages L1

and L1*, L2 and L2* and L3 and L3*,
N and N* to separate terminals on
the plant, so that at least one meas­uring voltage will be present if a ter­minal screw should come away
unintentionally (single fault toler­ance).

` Always connect the neutral con-

ductors N and N* to the same po­tential, e.g. neutral conductor on
the three-phase supply, earth con­nection.

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-243-2006-11

Safe monitoring relays

Voltage

PU3Z

Preparing for operation

` Supply voltage

Supply voltage AC DC

` Input circuit

Input circuit
Contactor to be monitored

` Measuring circuit

Measuring circuit
Measuring voltage L1

Measuring voltage L2

A2

A1

L1

A1

N

Y4

K1

Y5

L1

L1*

L2

A2

L1

L1

L2

L+

L-

Measuring voltage L3

Measuring voltage N

Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

L2*

L3

L3*

N

N*

L2

L3

L3

N

N

NSG-D-2-243-2006-11Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

-4

Safe monitoring relays

Voltage

PU3Z

` Reset circuit

Reset circuit
Automatic reset

S33

S34

Manual reset

` Feedback loop

Feedback loop
Contacts from external contactors

` Semiconductor output

24 V

Y41 ... Y46

FAULT

0 V

13 (23, 33)
14 (24, 34)

24 V DC
SPS Input
SPS Input
0 V

S33

S34

Y1
Y2

K5

K6

K5

K6

S3

L1
N

` Key

S3 Reset button

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-243-2006-11

Safe monitoring relays

Voltage

PU3Z

Terminal configuration

Installation

` The safety relay should be installed

in a control cabinet with a protec­tion type of at least IP54.

` Use the notch on the rear of the unit

to attach it to a DIN rail.

` Ensure the unit is mounted securely

on a vertical DIN rail (35 mm) by us­ing a fixing element (e.g. retaining
bracket or an end angle).

A1

DETECTION

19070

S33 S34 Y1 Y2Y5Y4

Dimensions

Y43

Y42Y41

POWER

SYSTEM
FAULT*

VOLTAGE

HAZARD

Y44

13

23 33

14 4224

VL1-L2
VL2-L3
VL1-L3
VL1-N
VL2-N
VL3-N

34

(Y41)
(Y42)
(Y43)
(Y44)
(Y45)
(Y46)

41

13 23 334241

14 24 34

PU3Z

121 (4.76")

L1 L1*

START

FEEDBACK CIRCUIT

L3 L3*

24V

0VY46Y45

L2 L2*

L1 L2

N*NA2

FAULT

NL3CONTACTOR

75 (2.95")
87 (3.42")

Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

112,5 (4.41")

NSG-D-2-243-2006-11Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

-6

Safe monitoring relays

Voltage

PU3Z

Notice

Service life graph

This data sheet is only intended for use
during configuration. For installation
and operation, please refer to the op­erating instructions supplied with the

10

AC15: 230 V

unit.

DC13: 24 V

1

D Nennbetriebstrom (A)

GB Nominal operating current (A)

Technical Details

Electrical data

Supply voltage
Supply voltage U
Supply voltage U

AC 120 - 240 V

B

AC/DC 24 V

B

Voltage tolerance -15 %/+10 %
Power consumption at U

Power consumption at U

AC 10.0 VA Order no.: 775510

B

DC 7.0 W Order no.: 775510

B

Frequency range AC 50 - 60 Hz
Residual ripple DC 20 %
Voltage and current at
Input circuit DC: 24.0 V 80.0 mA
Reset circuit DC: 24.0 V 40.0 mA
Feedback loop DC: 24.0 V 0.5 mA
Number of output contacts
Safety contacts (S) instantaneous: 3
Auxiliary contacts (N/C): 1
Category of output contacts in accordance with EN 954-1
Safety contacts (S) instantaneous: 4
Utilisation category in accordance with EN 60947-4-1
Safety contacts: AC1 at 240 V I

Safety contacts: DC1 at 24 V I

Auxiliary contacts: AC1 at 240 V I

Auxiliary contacts: DC1 at 24 V I

Utilisation category in accordance with EN 60947-5-1
Safety contacts: AC15 at 230 V I
Safety contacts: DC13 at 24 V (6 cycles/min) I
Auxiliary contacts: AC15 at 230 V I
Auxiliary contacts: DC13 at 24 V (6 cycles/min) I
Conventional thermal current 5,0 A
Contact material AgSnO2 + 0.2 µm Au

0.1

F Courant coupé (A)

E Corriente nominal de servicio (A)

I Corrente di esercizio nominale (A)

NL Nominale bedrijfsstroom (A)

10 100 1000 10000

D Schaltspielzahl x 10
GB Cycles x 10
F Nombre de manvres x 10

3

3

12.0 VA Order no.: 775505

: 0.01 A , I

min

: 1200 VA

P

max

: 0.01 A , I

min

P

: 120 W

max

: 0.01 A , I

min

P

: 1200 VA

max

: 0.01 A , I

min

: 120 W

P

max

: 5.0 A

max

: 5.0 A

max

: 5.0 A

max

: 5.0 A

max

max

max

max

max

: 5.0 A

3

: 5.0 A

: 5.0 A

: 5.0 A

DC1: 24 V

AC1: 230 V

E Número de ciclos x 10
I Numero dei cicli di commutazione x 10
NL Aantal schakelingen x 10

3

3

3

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-243-2006-11

Safe monitoring relays

Voltage

PU3Z

Electrical data

External contact fuse protection (IK = 1 kA) to EN 60947-5-1
Blow-out fuse, quick
Safety contacts: 6 A
Auxiliary contacts: 6 A
Blow-out fuse, slow
Safety contacts: 4 A
Auxiliary contacts: 4 A
Circuit breaker 24 VAC/DC, characteristic B/C
Safety contacts: 4 A
Auxiliary contacts: 4 A
Measuring voltage U
Measuring voltage U
Measuring voltage U

Measuring voltage U
Tolerance, measuring voltage -15% / +10%
Frequency range, measuring voltage AC 50 -60 Hz
Semiconductor outputs (short circuit proof) 24.0 V DC,50 mA
External supply voltage 24.0 V DC
Voltage tolerance -20 %/+20 %

Times

Switch-on delay
with automatic reset typ. 2 s
with automatic reset max. 3 s
with automatic reset after power on typ. 2,700 ms
with automatic reset after power on max. 3,500 ms Order no.: 775510

with manual reset typ. 20 ms
with manual reset max. 3,000 ms
Delay-on de-energisation after safety function 100 ms
with power failure typ. U

with power failure max. U

Recovery time at max. switching frequency 1/s
after power failure 1500 ms
Simultaneity, channel 1 and 2 3 s
Supply interruption before de-energisation 20 ms

Environmental data

EMC EN 60947-5-1, EN 61000-6-2, EN 61000-6-4
Vibration to EN 60068-2-6
Frequency 10 - 55 Hz
Amplitude 0.35 mm
Climatic suitability EN 60068-2-78
Airgap creepage EN 60947-1
Rated insulation voltage 600 V
Rated impulse withstand voltage 6 kV
Ambient temperature -10 - 55 °C
Storage temperature -40 - 85 °C
Protection type
Mounting (e.g. cabinet) IP54
Housing IP40
Terminals IP20

Mechanical data

Housing material
Housing PPO UL 94 V0
Front ABS UL 94 V0

AC Lx-Lx min.

B

AC Lx-Lx max.

B

AC Lx-N min.

B

AC Lx-N max.

B

AC : 240 V 100 ms Order no.: 775510

B

AC : 240 V 200 ms Order no.: 775510

B

110.0 V

600.0 V

64.0 V

346.0 V

4,000 ms Order no.: 775505

250 ms Order no.: 775505

350 ms Order no.: 775505

Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-243-2006-11Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

-8

Safe monitoring relays

Voltage

PU3Z

Mechanical data

Max. cross section of external conductors with screw terminals
1 core flexible 0.20 - 4.00 mm² , 24 - 10 AWG
2 core, same cross section, flexible:
with crimp connectors, without insulating sleeve 0.20 - 2.50 mm² , 24 - 14 AWG
without crimp connectors or with TWIN crimp connectors 0.20 - 2.50 mm² , 24 - 14 AWG
Torque setting with screw terminals 0.60 Nm
Dimensions
Height 87.0 mm
Width 112.5 mm
Depth 121.0 mm
Weight 740 g

The standards current on 2005-10 apply.

Order reference

Type Features Terminals Order no.

PU3Z 120 - 240 VAC Screw terminals 775 505
PU3Z 24 V AC/DC Screw terminals 775 510

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-243-2006-11