Rockwell Automation Allen-Bradley Guardmaster 440G-LZS21SP Series - Lock Command; Response Time When Connected in Series Circuit

Rockwell Automation Publication 440G-UM001C-EN-P - June 2019 25
Wiring Chapter 4
Lock Command
Tab le 11 shows the lock command function. The lock command is a 24V logic
signal with a current of less than 5 mA. The function of the logic signal is
dependent on the catalog number. The 24V power supply connection provides
the power to operate the locking solenoid, which extends and retracts the
locking bolt.
Table 11 - Lock Command Function
Catalog codes for both types are explained in Catalog Numbers on page 9.
Response Time When
Connected in Series Circuit
Catalog Number Function Value
440G-LZS21**R* Power to release 24V = Unlock
0V = Lock
440G-LZS21**L* Power to lock 24V = Lock
0V = Unlock
Actuator 1 Actuator 2 Actuator 3
Switch 1 Switch 2 Switch 3
RTN
24V DC
Power
Supply
+24
Green
Pink
Grey
Brown
Red
Ye l
White
A2
440R-N23132
Initial Conditions:
All switches are
locked
Switch 1 receives
Unlock command
(guard can then
be opened).
Lock/unlock
command
Switch 2 drops the 24V
(red and yellow) from
switch 1 OSSD outputs.
Green indicator ashes.
Switch 3 drops the 24V
(red and yellow ) from
switch 3 OSSD outputs.
Green indicator ashes.
Pink
Grey
Red
Ye l
White
Green
Blue
Pink
Grey
Red
Ye l
White
S11 41332313S12S52
S21 S22 42342414A1S34
200 ms150 ms100 ms0 ms
650 ms625 ms600 ms0 ms
Switch 1 guard is
closed
Switch 1 OSSD
outputs are
energized.
Switch 2 OSSD inputs (red
and yellow) transition to
24V DC from switch 1 OSSD
outputs. Switch 2 OSSD
outputs are energized.
Switch 3 OSSD inputs (red
and yellow) transition to
24V DC from switch 2
OSSD outputs. Switch 3
OSSD outputs are energized.
Green
Brown
Blue
Brown
Blue
Switch 1
Switch 2
Switch 3