Rockwell Automation Publication 440G-IN016A-EN-P - October 2017
3
TLSZR/L-GD2 Guard Locking Switch
Auxiliary Out Function
Lock and door position status are available for auxiliary output.
Lock Status (440G-TZS21UPRH and 440G-TZS21UPLH): Auxiliary
output changes state when the lock is either unlocked or locked
independent of the OSSD status.
Door Position Status (440G-TZS21UTRH and
440G-TZS21UTLH): Auxiliary output changes state when the
actuator key is either inserted or withdrawn. If the AUX is high (24V)
the switch can lock, position sensing of the actuator is accomplished by
an internal microswitch.
OSSD Outputs and Pulse Testing
The safety inputs are Safety A+ and Safety B+.
The OSSD outputs are Safety A and Safety B with the safe state defined
as 0V (guard door open or not locked).
The safety outputs use test pulses to detect short circuit and cross-wire
short detection. The cross-short pulses are asynchronous of duration
0.1 ms repeats every 11 s and the short circuit pulses are synchronous of
duration of 0.5 ms repeats every 11 s. The connected control system
must be tolerant of these pulses.
Allowable Approach Directions
The actuator and target are always be mounted as “close coupled” and
can approach the switch in any of the three entry slot positions shown.
Approach from the underside is not allowed.
Figure 1 - Clearance in Closed Position [mm (in)] (and Maximum
Actuator Insertion Distance for Locking)
Provide a separate mechanical stop to protect the switch.
• Minimum clearance: 2 (0.08)
• Maximum assured locking distance: 5 (0.20)
Auxiliary/Manual Release [mm (in.)]
If power is supplied to the switch and the switch is in the locked state,
operation of the auxiliary release causes the switch to enter a fault
condition (blinking red light-emitting diode).
To reset the switch, cycle the power.
A manual release is possible by removing the secure Torx screws and
pressing the internal mechanism.
Minimum Operating Radius [mm (in.)]
Minimum operating radius is for all planes of approach of the actuator
key, both along the length and perpendicular to the key. Use the two
setscrews on the actuator to optimize the key angle.
Lock Status
AUX (QD Pin 1)
Unlocked
High, 24V (0.2 A max.)
Locked
Low, 0V
Door Position Status
AUX (QD Pin 1)
Actuator key that is withdrawn
Low, 0V
Actuator key that is inserted
High, 24V (0.2 A max.)
IMPORTANT
Do not use the switch as a guard stop.
2...5 (0.0
8
...0.20)
T20
≤ 2.5 (0.09
8
) dia.
1
3
2
2
8
0 (3.19)
8
0 (3.19)
8
0 (3.19)
8
0 (3.19)
