1734 PLC confusion with IA4

[Monkey_77]

Hello All, I will first state that I am very new to the world of PLC's.
I do the control drawings where I work.
I'm trying to figure out the 1734 Point IO, specifically the 1734-IA4.

The manual states "Module power is supplied from the internal power bus".
Does this mean I do not need to run ANY power wires to the modules?
The installation manual shows points 4,5,6 and 7 as "L1" wires??

The system I am designing, from left to right has the following:
1794-PS13, 1734-AENT, 1734-FPD, Followed by Qty. 11 1734-IA4's.
I'm bringing 120VAC and 24VDC to the 1794-PS13.
From the 120VAC terminals, I run wires to the FPD.
From the 24VDC terminals, I run wires to the 1734-AENT.
On the first 1734-IA4, I would think I should bring any power there, because its already back plane fed...….correct? Or DO I run power wires there? Thanks in advance

 

[xnuke]

Do not wire external power to any 1734-IA4 module. Their AC power will be supplied from the FPD on the backplane - that's what "Module power is supplied from the internal power bus" means. Wire your AC out to the switch from one of the 1734-IA4's L1 terminals, then the signal wire from the switch to one of its input channels, as shown in the drawing in the installation guide. Their diagram also has a table below it that shows the appropriate power terminal (L1) to use with the appropriate input terminal to supplement the drawing. Follow the installation guide.

Also, a picture is worth a thousand words. Can you provide a sketch of the whole system so we can see if you're likely to make any mistakes?


xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.