Rockwell Automation 1734-IE4S POINT Guard I/O Safety Modules User Manual - Manual (Page 45)

Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 45
Chapter
3
Guidelines for Placing Power Supplies and
Modules in a System
Choosing a Power Supply The POINTBus™ backplane includes a 5V communication bus and field power
bus that get their power from a communication adapter or expansion power
supplies. All POINT I/O modules are powered from the POINTBus backplane
by either the adapter or expansion power supply. POINT I/O adapters have
built-in power supplies. Use the information and examples in this chapter to
determine if you need an expansion power supply in your system.
Follow the safety precautions listed in Chapter 1 and the wiring guidelines
described in Chapter 4 before connecting a power supply to the system.
To choose which types of power supplies meet your requirements, you must
consider the power consumption requirements for the 5V and 24V bus when
designing a POINTBus backplane.
Topic Page
Choosing a Power Supply 45
Power Supply Examples 46
Placing Series A Digital and Analog Modules 48
ATTENTION: To comply with the CE Low Voltage Directive (LVD), this equipment
and all connected I/O must be powered from a safety extra-low voltage (SELV)
or protected extra-low voltage (PELV) compliant source.
To comply with UL restrictions, field power and connected devices must be
powered from a single Class 2-compliant power supply.
TIP The following Rockwell Automation 1606 power supplies are SELV- and
PELV-compliant, and they meet the isolation and output hold-off time
requirements of the SmartGuard 600 controller:
• 1606-XLP30E
• 1606-XLP50E
• 1606-XLP50EZ
• 1606-XLP72E
• 1606-XLP95E
• 1606-XLDNET4 • 1606-XLSDNET4