Panasonic SF4C Series - Safety Input Function

SF4C Safety light curtain
3.4 Safety Input Function
63
3.4 Safety Input Function
!
DANGER!
When extending the cable of other SF4C series which is
connected to the safety input 1/2, use the exclusive cable.
The total cable length should be 40.5m or less (for each
emitter/receiver). If the total cable length is exceeding
40.5m, the device may malfunction, resulting in death or
serious injury.
This function controls the control output (OSSD 1/2) of this device by receiving the detection
signal of a safety contact or a safety sensor which is connected to the safety input 1 wire (gray)
and the safety input 2 wire (gray/black).
The control output (OSSD 1/2) forcibly turns OFF when the safety input 1/2 is OFF.

NOTE
• The temporal difference between the switching from OFF to ON and ON to
OFF during the output operation of the safety input should be 1s or less.
• A safety contact can be connected with the factory setting of this device.
• When connecting a safety sensor, the handy controller SFC-HC (optional) is
required. The maximum number of safety sensors which can be connected
to this device is 2 (only with version 2.1 of this device). For details see page
84.
Output ope
ration of a safety contact and a safety sensor
As safety contact you can use an emergency stop switch with two NC (Normally Closed) contact
points. As safety sensor you can use another safety light curtain or a safety switch with
semiconductor output.
NC (Normally Closed) ON-state operation OFF-state operation
Safety contact
ON: Status is safe (emergency
stop switch, etc.)
Safety sensor
ON: "Beam received" status (light
curtain, etc.)
ON: "Door closed" status (safety
switch etc.)
PNP output: Connect to
+V
NPN output: Connect to
0V
Open

NOTE
• When using the PNP output type (or NPN output type) of this device take
care that also the safety sensor is of the same type (PNP/NPN output).The
control output becomes OFF, if you use the wrong type of sensor.
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