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Chapter 4
Power, Ground, and Wire
42
Taps
To comply with the CE (European) Low Voltage Directive (LVD), a DC
source compliant with a protected extra low voltage (PELV) or, in certain
circumstances, a safety extra low voltage (SELV) per IEC 60204-1 must power
the tap. For IEC applications, an in-line, slow-blow 4 A fuse is recommended if
the power supply can provide more than 4 A.
For the USA, a Class 2 power supply must be used. The Class 2 supply limits
the current to 4 A, so an in-line fuse is not needed.
IMPORTANT In the USA, use of a 4 A fuse or circuit breaker in place of a Class 2 power
supply is not acceptable.
Figure 28
shows the power connections to the power tap. Power is connected
only to the first tap.
Figure 28 - Tap Power Connections
GuardLink First Tap
Pin 1: +24V DC
4 A
Pin 3: 0V DC
+ +
DC ok
24-
28V
1606-XLE240EN
N
L
PELV for IEC Compliance
Rockwell Automation Publication 440R-UM015C-EN-P - April 2018
GuardLink First Tap
Pin 1: +24V DC
Pin 3: 0V DC
+ +
DC ok
24-
28V
1606-XLP95E
N
L
Class 2 for USA Compliance
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