Datasheet

Relays for functional safety
Safety relays PNOZsigma
PNOZ s30
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
818
Monitoring for broken shearpins
An additional proximity switch or an HTL signal from an additional rotary encoder can be
connected to track Z to monitor for broken shearpins. These must both be configured as Z-
frequency monitoring.
Please note:
Monitoring for broken shearpins does not become active until
} The minimum speed has been exceeded and
} The tolerance for detecting feasibility errors has elapsed.
The minimum speed and tolerance depend on the ratio of the frequency at tracks AB "f
AB
"
to the frequency at track Z "f
Z
" in your configuration (fAB/fZ Verh. setting in the menu).
Minimum speed:
} when fAB/fZ Verh. ≥ 1.0
f
Z
= 70 mHz or f
AB
= (f
AB
/f
Z
) x 70 mHz
} when f
AB
/f
Z
Verh. < 1.0
f
AB
= 70 mHz or f
Z
= 70 mHz/(f
AB
/f
z
)
Tolerance for detecting feasibility errors:
} when fAB/fZ Verh. ≥ 1.0
7.5 Z-pulses or 7.5x (f
AB
/f
Z
) AB-pulses
} when fAB/fZ Verh. < 1.0
4.5 AB-pulses or 4.5/(f
AB
/f
Z
) Z-pulses
Hysteresis
For each switch function F1 ... F9 (with the exception of direction and position), a hysteresis
can be configured. This prevents the outputs on the speed monitor from bouncing if there
are fluctuations around the response value. The hysteresis becomes effective when the
output is switched on:
Switch-on value = switching threshold – hysteresis
For the lower range limit:
Switch-on value = switching threshold + hysteresis
Start types
You can choose between the following start modes:
} Automatic start
If an automatic start is configured, the output switches on automatically if the speed
does not reach the limit value, for example.
} Monitored start with rising edge
If a monitored start with rising edge is configured, the output switches on if the speed
does not reach the limit value and then a rising edge was detected at S34.