Pilz PNOZ General Product Line Information

Basics

Overview

Unlike conventional PNOZ units, units in the
PNOZelog product range are predominantly
electronic in structure. The safety and
auxiliary outputs use semiconductor
technology, which means they require no
maintenance and are wear-free. For this
reason, the PNOZelog-range is also suitable
for applications with frequent operations or
cyclical functions.

Input

circuit

Output

circuit

µController

connections

Parameter

setting

Logic

1.2

The electronic structure makes the units
flexible. Parameters on a unit can be set to
suit a number of application areas. The
parameters are set through the wiring (e.g.
jumpers). With the correct circuitry it is
possible to achieve categories 2, 3 and 4 in
accordance with EN 954-1.

Units in the PNOZelog-range can be linked
directly via the outputs and via special
inputs, which enable both a logic AND and a
logic OR connection between the units.

Fig. 1.2-1: Structure of PNOZelog units

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

2006-08

1.2-1

Basics

Description

Safety features

The relay meets the following safety
requirements:

● The circuit is redundant with built-in self­monitoring.

● The safety function remains effective in
the case of a component failure.

● A disconnection test periodically checks
the safety outputs, irrespective of the
status of the outputs

● The unit has an electronic fuse.

Operation

Each unit has one or more specific basic
functions, such as E-STOP monitoring,
safety gate monitoring. The units react the
same, irrespective of these basic functions:
If the start-up condition of the specific basic
function is met, there will be a high signal at
the internal output (see Fig. 1.4-1).
The internal output is AND/OR-linked,
depending on the wiring of the logic inputs
S35 and S36 (not on the PNOZ e1p). The
result of the logic operation can be found at
safety outputs 14 and 24.
On units which contain the letter “v” in their
name (e.g. PNOZ e1vp), the safety outputs
can have delay-on de-energisation. The
auxiliary output Y32 is always
instantaneous.

Basic function
Safety relay

Out1

S35

S36

Fig. 1.4-1: Operation of PNOZelog units

OR

AND

t

v

Outputs

14

24

Y32

Functions

● If there is a high signal (+24 VDC) at input
Y5Y5

Y5 for at least 250 ms, output

Y5Y5
switch to the

diagnostic function.diagnostic function.

diagnostic function. It is

diagnostic function.diagnostic function.

Y32 Y32

Y32 will

Y32 Y32

controlled via a driver that is available as
an accessory or that you can create
yourself. If input Y5 is open or low for
more than 300 ms, Y32 will operate as an
auxiliary output.

● An AND and an OR input

(not PNOZ
e1p) enable several units to form a logic
connection. The inputs have switch
delays, which are added together with
each unit that is linked.

Operating modes

The operating modes depend on the
individual unit. Please refer to the unit­specific descriptions for details of which
operating modes are available.

● Single-channel operation: Input wiring

in accordance with EN 60204, no redun­dancy in the input circuit; earth faults in
the input circuit are detected.

● Dual-channel operation: Redundant

input circuit; earth faults in the input
circuit are detected (exception: two-hand
control devices), with or without
detection of shorts between the input
contacts.

● Automatic reset: Unit is active as soon

as the input circuit and feedback loop are
closed.

● Monitored reset: Unit is not active until

the reset button has been operated and
then released. This eliminates the
possibility of the reset button being
overridden, triggering automatic
activation.

● Detection of shorts between contacts

is enabled by pulsing the input circuits.
This operating mode is automatically
detected on start-up.

● Start-up test prevents an automatic

restart when voltage is removed and
reapplied. The unit checks whether safety
gates that are closed are opened and
then closed again when supply voltage is
applied.

● Increase in the number of safety
contacts available by connecting a

contact block (e.g. PZE X4.1P) or
external contactors.

● Two-hand operation: The two-hand
control device must be activated by
operating two buttons simultaneously. If
one or both of the buttons are released, it
interrupts the control command to close
the press. The closing movement can
only be restarted when both buttons have
returned to their start position (released)
and are operated again.

1.4

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

2006-08

1.4-1