Rockwell Automation 442L SafeShield Safety Light Curtain Hardware - Manual (Page 28)

SafeShield Safety Light Curtain Hardware User Manual
28
Notes
• The plug alignment (direction of turn) in the housing
may vary from device to device. You can identify the
correct pin assignment by the position of the pins in
relation to each other as shown in the drawings.
• If you do not connect any further safety light curtain to
an extension connection, then you must also not
connect any cable to pins 9 and 10.
➢ If the extension connection is no longer required,
always screw the attached protective cap over the
extension connection.
External Device Monitoring (EDM)
The EDM checks if the contactors actually de-energize when the
protective device responds. If, after an attempted reset, the EDM
does not detect a response from the switched device within 300ms,
the EDM will deactivate the OSSD switching outputs again.
Figure 30: Connecting the contact elements to the EDM
You must implement the external device monitoring electrically by
the positive closing action of both N/C contacts (k1, k2) when the
contact elements (K1, K2) reach their de-energized position after
the protective device has responded. 24V is then applied at the
input of the EDM. If 24V is not present after the response of the
protective device, then one of the contact elements is faulty and
the external device monitoring prevents the machine starting up
again.
Notes
• If you connect the contact elements to be monitored to
the EDM input, then you must activate the option EDM
in the SCD software. If not, the device will show the
error .
• If you later deselect the EDM option, pin 6 of the
system plug must not remain connected to 24V.
Reset Button
In the protective operation mode with internal restart interlock
(see page 11) the operator must first press the reset button before
restarting.
0V DC
K1
K2
k2 k1
24V DC
Pin 6
Pin 3
Pin
Recommendation
You can reduce the wiring effort by connecting the reset button
directly to the spare extension connection on the receiver. In a
cascaded system this is the extension connection on the last
receiver.
Figure 31: Connection of the reset button and the signal lamp “Reset
required” to the extension connection
Connection of a Signal Lamp to the Output Reset Required
Pin 8 of the extension connection is the output “Reset required”
(24V). You can connect a signal lamp here to indicate this status.
The output has a frequency of 1Hz.
ATTENTION: Select the correct
installation site for the reset button!
Install the reset button outside the
hazardous area such that it cannot be
operated from inside the hazardous area.
When operating the reset button, the
operator must have full visual command of
the hazardous area.
Pin 1 (24V DC)
Pin 2 (0V DC)
Pin 8
Pin 5
As an alternative the
connection can be made
at the same pins on the
system connection.
ATTENTION: Device configuration
after replacement!
If you replace a safety light curtain with
active reset function with a replacement
unit, the reset function must again be
activated via the software. It is not sufficient
to make the electrical connections, because
new devices are supplied ex factory with
deactivated reset function.