Rockwell Automation Publication 440R-UM012E-EN-P - November 2018 21
Power, Ground, and Wire Chapter 3
Because the TLS3-GD2 guard locking switch has multiple contacts in series,
the maximum safety performance rating is Cat 3 PLd and SIL 2.
Safety Devices with OSSD Outputs
Devices, such as the TLS-Z guard locking switch, 440G-LZ guard locking
switch, and Bulletin 442G Multifunction Access Box (MAB) have current-
sourcing PNP semiconductor outputs (OSSD), which send their own pulse-
tested safety signals to the GLP safety input terminals. These devices must have
a common power-supply reference with the GLP safety relay.
Figure 10 - Example Connections to TLS-Z, 440G-LZ, or MAB
When using the TLS-Z and 440G-LZ guard locking switches, the maximum
safety performance rating is Cat 4 PLe and SIL 3.
Unlock Request Input
The Unlock Request input can be connected to the 24V supply through a
momentary, normally open push button switch or to a 24V sourcing output of
a programmable logic controller (PLC), where the PLC turns the request ON
or OFF. Some examples of Rockwell Automation® PLC output modules are
shown in Figure 11
.
The unlock request is connected to Terminal S54.
Figure 11 - Unlock Request Wiring
TIP Pulse test output X14 can be connected to either S12 or S22. Pulse test
output X24 can be connected to either S12 or S22.
TIP OSSD1 can be connected to either S12 or S22 and OSSD2 can be connected
to either S12 or S22.
S12 S22
GLP
X14 X24
A1
A2
+24V DC
TLS-Z,
440G-LZ
or MAB
OSSD1
OSSD2
24V DC Com
+24V DC
24V DC Com
+
1
2
3
Momentary
Normally-Open
Push Button
PLC Output
1756-OB16
1769-OB8
1746-OB4
1734-OB2
1793-OB4
PLC
Processor
GLP
S54
A1
A2
GLP
S54
A1
A2
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