Pilz

Safety relay

PNOZsigma

PNOZ s3

Single or dual-channel safety relay
Safety gate monitoring
Instantaneous E-STOP (Emergency stop) monitoring
Limit switch monitoring
Light beam device monitoring type 2 (with or without test pulse) & type 4
Monitored manual reset
Start-up testing
Self-test

20.4-26.4Vdc (24Vdc nom.)

Power LED indicator
In1 LED indicator
In2 LED indicator
Output LED indicator
Reset LED indicator
Fault LED indicator

Safety output contacts ratings
6A (24Vdc; DC-1)
6A (240Vac; AC-1)
5A (24Vdc; DC-13)
5A (230Vac; AC-15)

plug-in/detachable spring term. connections

2 operating modes (with or without detection of shorts across contacts)

DIN rail mounting

Single-channel operation -- No redundancy in the input circuit -- earth faults in the start circuit and input circuit are detected.
Dual-channel operation -- without detection of shorts across contacts / Redundant input circuit -- detects earth faults in the start and input circuit; short circuits in the input circuit and with a monitored start in the start circuit too.
Dual-channel operation -- with detection of shorts across contacts -- Redundant input circuit -- detects earth faults in the start and input circuit; short circuits in the input circuit and; with a monitored start; in the start circuit too; Shorts across contacts in the input circuit.
Automatic start -- Unit is active once the input circuit has been closed.
Manual start -- Unit is active once the input circuit and the start circuit are closed.
Monitored start -- with falling edge -- Unit is active once the input circuit is closed and then the start circuit is closed and opened again. The start circuit is closed and then opened again once the input circuit is closed.
Monitored start -- with rising edge -- Unit is active once the input circuit is closed and once the start circuit is closed after the waiting period has elapsed
Start with start-up test -- 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 available instantaneous safety contacts by connecting contact expander modules or external contactors/relays
A connector can be used to connect 1 PNOZsigma contact expansion module.

2 x digital inputs (24Vdc; 50mA) (S11-S12; S21-S22)
1 x reset/start input (S34)

2 x instantaneous safety outputs (2NO / 2xSPST-NO each made of 2 N.O. contacts in series; 6A 24Vdc DC-1 or 240Vac AC-1 resistive load) (13-14; 23-24)
1 x instantaneous aux. output (semiconductor output (1SO); 24Vdc; 20mA) (Y32)

IP40

W17.5mm

100 mm

17.5 mm

120 mm

PC housing

-10...+55 °C

2.5 W

Commercialized

EN 60947-5-1
EN 60204-1
EN 62061
EN ISO 13849-1
VDE 0113-1
SIL3 / PL.e / Cat.4
PFH = 2.31E-09
CE
cULus
EAC
TUV
KOSHA
CCC

SIL3 / PL.e / Cat.4

Positive-guided relay outputs -- 2 safety contacts (N/O); instantaneous
1 semiconductor output
Connection options for E-STOP pushbuttons / Safety gate limit switches / Start buttons / Light grids and safety switches with detection of shorts across contacts
A connector can be used to connect 1 PNOZsigma contact expansion module
Operating modes can be set via rotary switch
LED indicator for supply voltage / Input status; channel 1 / Input status; channel 2 / Switch status channel 1/2 / Start circuit / Error
Plug-in connection terminals (either spring-loaded terminal or screw terminal)
The circuit is redundant with built-in self-monitoring.
The safety function remains effective 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.