Table of Contents
Advertisement
5-1
LED indicators
5-2
External Device Monitoring (EDM)
All F3S-TGR-CL systems have visible LED on the receiver element to show
the proper alignment of the system. These LEDs are used during alignment
process and they are not part of the safety critical system. A failure in one of
these indicators will not cause an alarm condition and the system will continue
to operate.
EDM is an important safety function. It monitors the F3S-TGR-CL system
interface to the guarded machine, checks to ensure that the control elements
are responding correctly to the light curtain and detects any inconsistency
between the two external control devices. This is necessary to detect a mal-
function within the interface which prevents a stop signal from reaching the
machine controller. The connection for the EDM is made at the receiver. On
power-up, the F3S-TGR-CL system looks for a closed to +24VDC condition. If
this is found, it will enter a state consistent with the selected operating mode.
When the F3S-TGR-CL system enables its safety outputs, it monitors the
external devices for a closed to open transition. This transition must occur
within 300ms or the F3S-TGR-CL system will then enter an alarm state. Addi-
tionally, if the EDM connections are incorrectly wired, the system will enter an
alarm state.
The EDM function can be activated and
deactivated using the selector switches
on the receiver unit.
Wiring diagram:
K1 and K2 are standard contactors,
KM1 and KM2 are NC contacts (forcibly
guided) of K1 and K2.
Timing diagram:
OSSD
ON
OFF
Signal on
+24
White cable
0v
Diagnostic and Test Features
SCH.
< 0.3sec
Not checked
SECTION 5
RECEIVER
BROWN
BLUE
WHITE
GRAY PINK
RESTART
6
Advertisement
Table of Contents
