Download Light Curtain with Muting Safety Function

Safety Function Documents: GuardLogix
Light Curtain with Muting
RightSight™ Optical Sensors / GuardLogix® Controller
Safety Rating: PLe, Cat. 4 to EN ISO 13849.1 2008
Functional Safety Description
Bill of Material
Hazardous motion is interrupted or prevented by interrupting
the light curtain. The 440L light curtain is wired to a pair of
safety inputs of a 1734-IB8S module. The RightSight muting
sensors are wired to inputs on the 1734-IB8S module as well.
The I/O module is connected via CIP Safety over an EtherNet/
IP network to the Compact GuardLogix® safety controller, 1768L43S.
This application example uses these components.
The safety code in the safety processor monitors the status of
the safety input using the
pre-certified safety instruction ‘Dual Channel Input Stop’ (DCS).
The output of the DCS, along with the two (2) muting sensors,
is used as an input into the TSAM (two sensor asymmetrical
muting) function block to handle the muting safety function.
When all safety input interlocks are satisfied, no faults are
detected, and the reset push button is pressed, a second
certified function block called Configurable Redundant Output
(CROUT) controls and monitors feedback for a pair of 100S
redundant contactors.
In summary, when the un-muted Light Curtain is blocked, the
contactors drop out. When the Light Curtain is unblocked, and
the reset button is pressed, the contactors are energized.
A properly muted light curtain can be broken without dropping
out the safety contactors.
When the light curtain is muted, the muting lamp will be
energized.
Cat. No.
Description
Quantity
440L-P4JL0640YD
GuardShield™ Safety Light Curtain, Res 14mm, Pt Ht
640mm, 64 Beams, Integrated Laser Alignment
1
42EF-B1KBBE-F4
Diffuse Backgroun Suppression, Dark Operate, PNP
photoelectric sensor, HI when target absent
2
889D-F4AC-2
DC Micro (M12), Female, Straight, 4-Pin, PVC Cable,
Yellow, Unshielded, 22AWG, 2 meter
3
889D-F8AB-2
DC Micro (M12), Female, Straight, 8-Pin, PVC Cable,
Yellow, Unshielded, 24AWG, 2 meter
1
800FM-G611MX10
800F Reset Push Button - Metal, Guarded, Blue, R,
Metal Latch Mount, 1 N.O. Contact(S), Standard
1
100S-C09ZJ23C
Bulletin 100S-C - Safety Contactors
2
1768-ENBT
CompactLogix™ EtherNet/IP Bridge Module
1
1768-L43S
Compact GuardLogix Processor,
2.0 MB standard memory, 0.5 MB safety memory
1
1768-PA3
Power Supply, 120/240 VAC Input, 3.5 A @ 24V DC
1
1769-ECR
Right End Cap/Terminator
1
1734-AENT
24V DC Ethernet Adapter
1
1734-TB
Module Base with Removable IEC Screw Terminals
4
1734-IB8S
POINT Guard Safety Input Module
1
1734-OB8S
POINT Guard Safety Output Module
1
1783-US05T
Stratix 2000™ Unmanaged Ethernet Switch
1
800T-QTH24G
Pilot Light, 24VDC
2
NHP Safety Reference Guide > Safety Function Documents: GSR
6A-46