Pilz P1HZ 2 Data Sheet

Two-hand Relays

EN 574, Type IIIA

P1HZ 2

Two-hand relay in accordance with
VDE 0113-1, 11/98, EN 60204-1,
12/97 and IEC 204-1, 11/98.

Features

● Conforms to EN 574, Type IIIA
with partial fail to safety and in
accordance with EN 954,
Category 1.

Approvals

P1HZ 2

●

●

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Technical Details P1HZ 2

Electrical Data

Supply Voltage AC: 24, 42, 110, 115, 120, 230, 240 V

DC: 24 V
Tolerance 85 ... 110 %
Residual Ripple DC Max. 20 %
Power Consumption Approx. 4 VA/2 W
Voltage and Current at the 24 VDC, 40 mA
Input Circuits 1/2
Switching Capability in accordance with
EN 60947-4-1, 01/00 AC1: 240 V/6 A/1500 VA

DC1: 24 V/1.5 A/12 W
EN 60947-5-1, 08/00 AC15: 230 V/2.5 A; DC13: 24 V/1.5 A
(DC13: 6 cycles/min.)
Output Contacts 2 safety contacts (N/O)
Contact Fuse Protection 6 A quick or 4 A slow
(EN 60947-5-1, 08/00)

Times

Delay-on Energisation EN 574 10 ms
Delay-on De-energisation Approx. 30 ms
Simuiltaneity channel 1/2 Max. 500 ms

Mechanical Data

Torque Setting on Connection Terminals 1.2 Nm (screws)
Maximum Cross Section of 2 x 2.5 mm
External Conductors Single-core or multi-core with

crimp connectors
Dimensions (H x W x D) 87 x 45 x 110 mm
Weight AC: 380 g, DC: 280 g

Description

● 45 mm, P-75-housing, DIN-Rail
mounting

● Positive-guided relay outputs:
2 safety contacts (N/O)

● Increase in the number of
safety contacts available by
connecting expander modules.

Function Description

The two-hand relay is not suitable for
use as the primary safety device on
mechanical and hydraulic presses or
in safety circuits for type IIIC
applications. For such applications
we recommend using the P2HZ 5 or
P2HZ X1.
A cycle can only be initiated by
pressing the two pushbuttons
simultaneously. A cycle is interrupted
by releasing one or both buttons to
stop the output.
The output signal can only be
reinitiated after both inputs have
been released and the pushbuttons
are operated again.

2

3

NSG-D-2-081-07/01

Two-hand Relays

EN 574, Type IIIA

P1HZ 2

3

Internal Wiring Diagram

U

A1

(L+)

T1

~

G1

+

Feedback

B

control loop

A2

(L-)

=

X1X2

Function Diagram

Operating Voltage

Input circuit 1

Input circuit 2

Simultaneity

Feedback Control Loop

Output

No significance
Feedback control loop open: 0
Feedback control loop closed: 1

(1): Normal working cycle
(2): Fault: feedback control loop not

closed at least 0.5 s before input
circuit 1/2

1

U

B

0

1

0

1

0

1

t

g

0

1

0

1

0

Input circuit 1
T14

(6)

t

g

(1)

Safety
contacts

T24T13 T23

13 23

K1

K2

14 24

t

(5)

Switch-on delay/
cycle test

Channel 1

K2K1

(2)

Input circuit 2

Channel 2

(3) (4)

(3): Fault: difference

input circuit 1/2 > t

(4): Fault: input circuit

g

1/2 closed before UB applied

(5): Fault: feedback control loop not

opened before the cycle t

(6): Undefined time period

● Increase in safety contacts
The number of output contacts can
be increased by using expander
modules or relays/contactors with
positive-guided contacts.

1L1

(1L+)

K4

K3

X1 X2

1L2

(1L-)

g

g

F2

13

14

K3 K4

Connection Example

1L1

(1L+)

F1

S1

A1

13

23

(+)

24

14

T23

S2

1L2

(1L-)

T13

X1

T24

X2

T14

– Key

S1/S2: Two-hand pushbuttons

A2
(-)

NSG-D-2-081-07/01