Rockwell Automation Publication 1734-UM013N-EN-P - September 2017 47
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.
Topic Page
Choosing a Power Supply 47
Power Supply Examples 49
Placing Series A Digital and Analog Modules 51
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 one Class 2-compliant power supply.
The 1734-OBV2S module requires the use of SELV 150VA Max. supply.
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
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