Rockwell Automation Publication 440G-UM001C-EN-P - June 2019
39
Application Examples
Chapter 7
Figure 12 - GLT and 440G-LZ Safety Switch Schematic
Circuit status as shown: The gate is open and unlocked. The motor is off. The
GLT is ready for reset. The GLT has a Logic setting of 3: (Category 1 Stop), a
Range setting of 4 (10 seconds) and a Time setting of 8 (80%). The Y32 output
turns OFF immediately; 8 seconds later, the safety outputs turn OFF.
The safety outputs (14 and 24) and the single wire safety output (L11) are
OFF and the auxiliary output (Y32) is ON.
Starting
Close the gate. Press Reset and Gate Lock Request to lock the gate and turn on
the GLT safety outputs. Press Start to turn the motor ON.
Stopping
Normal production stops are performed by pressing Stop. Access through the
safety gate is initiated by pressing the Gate Unlock Request. The Y32 output of
the GLT turns OFF, which commands the PowerFlex drive to bring the motor
to a stop. After the configured time delay (eight seconds) expires, the GLT
safety outputs turn off, and the gate becomes unlocked. After you leave the cell
+24V DC
Red (OSSD A+)
Pink (OSSD B)
Green (Lock)
White (Aux)
Blue (Gnd)
Grey (OSSD A)
Yellow (OSSD B+)
Brown (+24)
24V DC Com
M
Gate
Unlock
Request
Reset &
Gate Lock
Request
889D-F8NB-2
GLT
440R-GL2S2T
A2
S12 S22
24
B2
L61
51
L12 14
A1
S11 S12
S44
S54
L11
Y32
LOGIC
01
2
3
4
5
6
7
8
9
TIME
01
2
3
4
5
6
7
8
9
RANGE
01
2
3
4
5
6
7
8
9
L1 L2 L3
Gate control
power supply
Gate control
circuit
S1
S2
1 Stop
PowerFlex
525
2 Start
4 Gnd
R
T
S
U
W
V
11 +24V DC
Safety
Gate
440G-LZS21SPRH
Power-To-Release
Aux = Lock Status
Diag
Status
440G-LZ
IMPORTANT
Start the GLT logic configuration from “0” to configure 14 and 24 for use with
pulse testing; the PF525 can operate with pulse tested inputs to S1 and S2.
