Rockwell Automation 1753-OW8 GuardPLC 8-Relay Output Module Installation Instructions - Manual (Page 6)

6 GuardPLC Relay Output Module
Rockwell Automation Publication 1753-IN012C-EN-P - June 2010
Ground the Module
The module is functionally grounded through its DIN rail connection. A protective earth
ground connection is required and is provided through a separate grounding screw on the upper
left of the housing and marked with the grounding symbol .
You must also provide an acceptable grounding path for each device in your application. For
more information on proper grounding guidelines, refer to the Industrial Automation Wiring
and Grounding Guidelines, publication
1770-4.1 .
Wire the Module
The following sections describe how to connect the voltage supply and connect the relay 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 adapter. 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.
ATTENTION: This product is grounded through the DIN rail to chassis ground.
Use zinc-plated yellow-chromate steel DIN rail to assure proper grounding. The
use of other DIN rail materials (for example, aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or intermittent
grounding. Secure DIN rail to mounting surface approximately every 200 mm
(7.8 in.) and use end-anchors appropriately.
IMPORTANT Protect the module with a 10 A slow-blow fuse.
ATTENTION: Do not reverse the L+ and L- terminals or damage to the module
will result. There is no reverse polarity protection.