Rockwell-automation 1753-IB20XOB8 GuardPLC Digital Input/Output Module User Manual download pdf (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

(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.

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Rockwell-automation 1753-IB20XOB8 GuardPLC Digital Input/Output Module User Manual Page 6