Signal Inputs On The Receiver - Pepperl+Fuchs SLCS Original Instructions Manual

Safety Light Curtain SLCS
Installation
A/B mode input
The A/B mode input is located both on the transmitter and on the receiver. If the
input is open or connected to 0 V, the safety light curtain operates in mode A. The
inputs must be connected to the supply voltage to switch to mode B.
After the power supply is switched on, the transmitter or receiver selects mode A
or mode B, depending on the applied voltage.
Note!
Make sure that the transmitter and receiver are operating in the same mode.
If the level at the input changes during operation, this is identified as a fault and
the system switches to safe mode.
5.4.3

Signal Inputs on the Receiver

Connect the restart (RI) and relay monitor inputs to the receiver with NC contacts
that switch 24 VDC. The function is triggered if the external control contact is open
for a defined period.
Restart (RI), startup/restart interlock input
The startup/restart interlock prevents the OSSDs from switching to ON after the
protection field is cleared or after the power supply is turned on when the
protection field is free. The safety function is only activated once the startup
enable button has been pressed.
Note!
If no people are in the hazardous area and the hazardous area is vacant, the
startup enable can be issued.
Position the startup enable button by the hazardous area so that
the hazardous area is clearly visible and
■
activation from within the hazardous area is not possible or cannot initiate a
■
response (protection field is interrupted when the button is pressed).
An NC contact that switches the power supply must be connected to the input to
activate the function. To disable the function, the input must be connected to the
status/select output. An open input also activates the startup/restart interlock.
The input signal time is monitored and the signal should be active for 0.2 s to 1.2
s.
In the event of a fault, a fault reset can be triggered by pressing the button for
between 1.2 s and 2.4 s.
EN
EN - 19