Circuitry Of The Control Ports - Festo EMCA-EC-67 Serie Traducción Del Manual Original

EMCA-EC-67-...
2.1

Circuitry of the control ports

To protect against unintended start-up, the device must be powered via the connection
[X6] with the category required for the application in accordance with EN ISO 13849-1.
Attainable safety level of the STO function è Chapter 1.1.3.
The following components can be connected to the control ports (è Tab. 8) to request the STO function:
– Safe semiconductor outputs (electronic safety switching devices, active safety sensors, e.g. light
curtains with OSSD signals) (Output signal switching device/OSSD)
– Switch contacts (safety switching devices with relay outputs, passive safety sensors, e.g. forced
position switches)
0 V DC
+24 V DC
1
1
1
EMCA with STO interface
(only relevant connections illustrated)
2
Emergency stop switches
Fig. 2 Switching example (without cross-circuit detection)
Festo – EMCA-EC-67-... – 1603 English
2
S1
1 3
2 4
2 3 4 5 6
EMCA
S1
S1
Transmitter
1 2
S1
3 Guard door (alternative to 2)
4 Light curtain (alternative to 2)
5 Safety switching device (alternative to 2)
1 3
3
2 4
1 3
Receiver
4
2 4
1 3
5
2 4
29