Rockwell Automation Publication 440R-UM010C-EN-P - September 2016 17
Power, Ground, and Wire Chapter 3
Since the TLS3-GD2 interlock switch has multiple contacts in series, the
maximum safety performance rating is Cat 3 PLd and SIL CL2.
Regardless of how these switches are wired, performance remains the same.
The GLT safety relay successfully recognizes when one or both channels open,
and the GLT safety relay detects cross channel faults and single channel faults
to +24V and to 24V common.
Safety Devices with OSSD Outputs
Devices, such as light curtains, laser scanners, and solid-state interlocks have
current-sourcing PNP semiconductor outputs (OSSD), which send safety
signals to the GLT safety input terminal and do not use the pulse test outputs.
These devices must have a common power supply reference with the GLT
safety relay.
Figure 11 - Connections to Device with OSSD Outputs
When using the TLS-ZR and 440G-LZ guard locking switches, the maximum
safety performance rating is Cat 4 PLe and SIL CL3.
TIP Pulse test output S11 can be connected to either S12 or S22. Pulse test
output S21 can be connected to either S12 or S22.
IMPORTANT Both devices must have the same power supply reference.
TIP OSSD1 can be connected to either S12 or S22 and OSSD2 can be connected to
either S12 or S22.
S12 S22
GLT
S11 S21
A1
A2
+24V DC
TLS-Z &
440G-LZ
OSSD1
OSSD2
24V DC Com
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