Rockwell Automation 1753-IB20XOB8 GuardPLC Digital Input/Output Module Installation Instructions - Manual (Page 6)

6 GuardPLC Digital Input/Output Module
Rockwell Automation Publication 1753-IN003C-EN-P - June 2010
Wire the Module
The following sections describe how to connect the voltage supply and connect the inputs and
outputs.
Connect the Voltage Supply
To comply with CE Low Voltage Directives (LVD) and UL restrictions, you must use either a
Safety Extra Low Voltage (SELV), or a Protected Extra Low Voltage (PELV) power supply to
power this module. A SELV supply cannot exceed 30V rms, 42.4V peak, or 60V DC under
normal conditions and under single-fault conditions. A PELV supply has the same rating and is
connected to protected earth.
The supply voltage is connected via a 4-pin connector that accommodates wire sizes up to
2.5 mm
2
(14 AWG). You need to connect only one wire to L+ and one wire to L-. Both L+ and
L- terminals are internally connected, so you can daisy-chain 24V DC power from the module to
other devices in the panel by using the remaining terminal.
IMPORTANT Protect the module with a slow-blow fuse.
IMPORTANT The module can draw up to 8 A. The controllers need 0.4 A to operate. Up to
7.6 A can be used to source voltage power for inputs and outputs connected
to the module.
ATTENTION: Do not reverse the L+ and L- terminals or damage to the module
will result. There is no reverse polarity protection.