1756 Chassis Series B vs C: Automation Tech Talk for August 14, 2025

Let's talk about how the Series C 1756 Chassis differs from the Series B in today's Automation Tech Talk, Lunchtime Edition: Watch Automation Tech Talk on The Automation Blog: Listen to Automation Tech Talk on The Automation Blog: Automation Tech Talk Show Notes: Thanks for listening! If you'd like to join the show sometime, don't hesitate to use the contact us link. Read the transcript on The Automation Blog: (automatically generated) Shawn Tierney (Host): Hey, everybody. Happy lunchtime. It is Shawn Tierney here from Insights and Automation. I'm actually back in the training room working on a bunch of different stuff, but, I did wanna jump on here at lunchtime. Actually, I have to, be in another meeting at 01:00, but still, I wanted to stop by and do a automation tech talk with you at lunchtime. And, I was just thinking of something, like, I just learned. Well, I shouldn't say I just learned it. But, in any case, guys, feel free to post any comments, questions, or in the in the chat. I don't see the names when you post them on LinkedIn. I don't know why this is a StreamYard limitation, but I should see your username if you post them from YouTube. And, of course, afterwards, I do post these on the automation blog. I post them on the podcast channel, and I try to do the, the, the text version of the show afterwards when it's ready. So So if you wanna read it the following morning or later that night, you can. So with that, in any case, I hope you're having a great lunch. Today, I wanted to talk about a couple things here first. The first one is if you're in any of my courses, I wanted to talk to you about I'm adding a bunch of new lessons every day as I work on the new ones, the new courses, which you all don't have access to yet, but you will get access to them, you know, and the appropriate ones. I updated the IO devices, lessons. So and I actually have all the updated IO here and addressing and whatnot. So I just wanted to make you guys aware of that. I'm doing that for all of the existing PLC courses. I'm updating them all. Also, I have stop files coming too, updated stop files. So, keep your keep your eyes out for that. But now let's get into today's topic, and it's about the series c chassis, the 1756 ControlLogix series c's chassis. Let me go back to full screen here. So recently, I'm I'm setting up a, an alternative, a filming studio in the house. Right? So if, you know, if we have a bad winter and I get snowed in, I wanna be able to film. Right? And so what I have had up to this date is, and, again, all these were purchased us on the secondhand market because of the expense of the new trying to keep my courses affordable. But this is a series b seventeen fifty six chassis. I'm I'm sure most of you have seen these before, and this is actually getting mounted in this room. And I don't know how good this webcam is. I don't know if you guys will be able to see that label. I haven't I didn't try that before the show. Everything on my screen is reversed, but that is definitely a series b. And I just wanna look at these patterns here. Right? Now one of the things that you may have noticed with newer products from Rockwell, and we've had them on the show that cover this stuff, and I hope to have them on the show many more times this year too. But in any case, I I love having all vendors on the show. I think I was telling you guys early in the week. I met with, local, integrator who carries a lot of the brands that I have not had on the show, and I wanna get those people on the show. So they're gonna they're gonna I'm sorry. I should say a local reseller and panel shop, and they should, they're gonna try to hook me up with them. So great guys over there, Chris and Amy. But in any case, I wanted to, you know, when when we came out to the new modules like this guy, you could see they now have this huge I hope you guys can see this okay. Huge heat sink on them,

Episode Transcript

(00:31):
Hey, everybody. Happy lunchtime. It is Sean Tierney
here from Insights and Automation. I'm actually back
in the training room working on a bunch
of different stuff, but, I did wanna jump
on here at lunchtime.
Actually, I have to, be in another meeting
at 01:00, but still, I wanted to stop
by and do a automation tech talk with
you at lunchtime.
And, I was just thinking of something, like,

(00:52):
I just learned.
Well, I shouldn't say I just learned it.
But, in any case,
guys, feel free to post any comments, questions,
or in the in the chat.
I don't see the names when you post
them on LinkedIn. I don't know why this
is a StreamYard limitation, but I should see
your username if you post them from YouTube.

(01:13):
And, of course, afterwards, I do post these
on the automation blog. I post them on
the podcast channel, and I try to do
the,
the, the text version of the show afterwards
when it's ready. So So if you wanna
read it the following morning or later that
night, you can. So with that, in any
case, I hope you're having a great lunch.
Today, I wanted to talk about a couple

(01:33):
things here first. The first one is if
you're in any of my courses,
I wanted to talk to you about I'm
adding a bunch of new lessons every day
as I work on the new ones, the
new courses, which you all don't have access
to yet, but you will get access to
them, you know, and the appropriate ones. I
updated the IO devices,
lessons.
So and I actually have all the updated

(01:55):
IO here and addressing and whatnot. So I
just wanted to make you guys aware of
that.
I'm doing that for all of the existing
PLC courses. I'm updating them all.
Also, I have stop files coming too, updated
stop files. So, keep your keep your eyes
out for that. But now let's get into
today's topic,
and it's about the series c chassis, the

(02:15):
1756
ControlLogix
series c's chassis. Let me go back to
full screen here. So recently, I'm I'm setting
up a, an alternative,
a filming studio in the house.
Right? So if,
you know, if we have a bad winter
and I get snowed in, I wanna be
able to film. Right? And so what I
have had up to this date is,

(02:37):
and, again, all these were purchased us on
the secondhand market because of the expense of
the new trying to keep my courses affordable.
But this is a series b
seventeen fifty six chassis. I'm I'm sure most
of you have seen these before,
and this is actually getting mounted in this
room.
And I don't know how good this webcam
is. I

(02:58):
don't know if you guys will be able
to see that label. I haven't I didn't
try that before the show. Everything on my
screen is reversed, but that is definitely a
series b. And I just wanna look at
these patterns here. Right?
Now one of the things that you may
have noticed with newer products from Rockwell,
and we've had them on the show that
cover this stuff, and I hope to have
them on the show many more times this
year too. But in any case, I I

(03:20):
love having all vendors on the show. I
think I was telling you guys early in
the week. I met with,
local, integrator who carries a lot of the
brands that I have not had on the
show, and I wanna get those people on
the show. So they're gonna they're gonna I'm
sorry. I should say a local reseller and
panel shop, and they should, they're gonna try
to hook me up with them. So great
guys over there, Chris and Amy.

(03:40):
But in any case, I wanted to, you
know, when when we came out to the
new modules like this guy,
you could see they now have this huge
I hope you guys can see this okay.
Huge
heat sink on them, and there's a warning
even on the, like, the LA. I don't
have an LA, but there's actually a warning
here. You can you probably can't read it
from there. But it's like, hey. This thing

(04:00):
could be hot. So when you take it
out, be careful. And they feel a lot
heavier. If you compare this to, like, an
l seven
right? So here's my safety l seven. The
partner's still in the chassis. But look at
that. You can you can see right through
that.
K?
Not as beefy. Right? It's still a very
powerful controller, but when you compare it to

(04:20):
this guy, the heft of that that,
heat sink And the l eights, I think,
are even hell heavier than this. I don't
know about the l nines. I I hope
to get my hands on one,
in the near future, but, you know, they're
not even out yet. So I don't wanna
put myself too far ahead. But in any
case,
you know, when when Rocco was releasing new
chassis,

(04:41):
they decided to increase the venting. So, again,
just for comparison, here is the series b
chassis. Okay?
Right. And let's see if I can hold
these both up. I haven't practiced this. I
it's just lunchtime. And, look at the series
c chassis. So I picked this up from
my home studio.
I had to drop a $110 on it,
but, hey. You know, now that I got
it, I got it. Right? Look at the

(05:02):
difference of the amount of airflow you can
get through that baby.
Okay? And now they say and I I
you know, I didn't test it. I'm not
consumer reports. I don't have heat cycling ovens
and all kinds of strain gauges and stuff
that, you know, I could test this, but
they say it's just as strong as the
other one. Right? I gotta be careful not
to break it. I don't wanna have to
buy another one. But, in any case,
it's a lot more venting. Right? And it

(05:24):
makes sense because these newer products generate a
lot more heat because it's just the chipsets
are in there. Now I thought it'd be
fun, though, to let's let's see what Rockwell
officially says about these new chassis.
So now we'll go back over to the
stage here, and, I am logged in. This
is a free I do not have a
tech connect. I don't, like, need all the

(05:44):
tech support they offer. So I had one
a long time ago, but I let it
expire because, well, I'm self employed. But in
any case,
I haven't needed to call them. So here,
this is a tech note I found just
right before coming on. I just typed in
ControlLogic series c's chassis. Boom. Came right up.
I I love the simplicity of their and
the ease of use of their knowledge base.

(06:04):
I really do.
But in any case many companies have good
knowledge bases. Those who don't
should look at the people who do because
it it does make a difference from the
user perspective.
In any case, they say, hey. Series c,
direct replacement for series b, and then they
have a nice little story in here.
So the difference is the ventilation, alright, the

(06:24):
knockout pattern
in the sheet metal for the convection
airflow.
While the design team was making the sheet
metal changes, they took the opportunity to incorporate
a few other
mechanical and physical enhancements,
that have been received in the past. Improve
card guide. Now I haven't compared the two,

(06:46):
but I can tell you sometimes those old
chassis, the the guides were sticky, and it
was very annoying because you're spending a lot
of money for something you want that card
to slide in and out.
New additional optional mounting hole for high shock
vibrate slash vibration environments. That's always good. Improved
ventilation
for future high performance modules.

(07:06):
I think somebody at Rocco told me they
were getting to the point where
you're gonna have to start derating. These things
were generating so much heat. They would have
to start derating the you know, you know,
a lot of companies do 20, you know,
zero to 50 c or zero to 60
c without getting into the extreme
products.
So, but, yeah, they with with the they
needed more airflow to avoid that derating.

(07:28):
So saying, hey. You only can go to
40 c or whatnot.
What else do they have here? Improved
stiffer
mounting
tab.
I don't know, I don't know what
what we're talking about here.
The plastic seem the same.
Maybe it's the, maybe it's the, the ears,

(07:48):
the mounting ears here.
I don't know if they feel stiffer.
Just trying it out now.
Trying it out live.
They they feel the same. So I don't
know. I don't know what I don't know
what that is. Because if somebody from Rock
was wanting watching and you wanna join, join,
let me know.
New additional grounding screwed.
Is there a another grounding screw? Oh, yeah.

(08:09):
There's two now. Let me go back to
full screen here. I didn't notice that.
Full screen. Okay. So there is now two.
I don't know if this is coming out
well on the camera. One, two. Whereas before,
there was only
just the one.
So, you know, two's better than one. I
mean, I I don't know what that cost

(08:30):
them to do that, but I'm thinking
probably less than a buck of chassis when
I don't know. They sell for a lot
new. I mean
so you think that if people want it,
give it to them.
Okay. So let's go back to
here.
Please note, the series c's chassis will carry
all the same certifications as series b.
Temper

(08:50):
temperature ratings improved from zero to 60
to minus 25 to 60.
You wonder
I I I don't wanna think the additional
airflow would allow you to go cooler. Right?
Maybe I'm wrong. Maybe the additional
the additional,
no. It has to be something else. I
don't know. You guys tell me. What do

(09:12):
you think? Why can it go cooler now?
Nonoperational shock will decrease from 50 g from
50 g to 30 g.
Interesting.
Interesting changes.
So, yeah, that's it. Let's see what techno
this was. This was
QA
twenty three six eighty five. And so

(09:33):
that is what I learned new today. Actually,
I knew about this back. I think it
it happened back in 2015.
And,
you know, I think the the cool thing
was that, you know, they told us ahead
of time, it's a 100% direct replacement except
for this the the
storage fee, I guess. But,
I just wanted to share that with you

(09:53):
because I finally got one in for the,
for the home studio
for those snow days or any other days
that, you know, the car breaks down,
or something else, I can still film out
there at the home studio. So I've take
actually taken a couple of the cameras out
of Studio A, which I'm just using Studio
B now, and, and bringing those home as
well. So, in any case, so that's what

(10:15):
I had. Now I'm looking over at the
chat here. I want I wanna thank everybody
who joined, by the way, and who watched.
I'm not seeing anybody in the chat. So
I think with that, what do we got
coming? Last yesterday, we had the PROFINA episode.
I edited it yesterday. You know, I have
you have to watch it a couple more
times to edit it, and I really thought
it was good. I really enjoyed it. They
do have free seminars coming up, so keep
that in mind.

(10:35):
Also, free IO Link seminars coming up, and
the the episode I'm recording this afternoon is
on IO Link. So pretty excited about that.
Very popular product. I can't wait to add
some IO Link lessons to my courses, but,
you know, everything has to everything comes in
its own time. But I do have plenty
of IO Link products here, and I have
some IO Link shows coming out as well.
But with no questions,
I think I'm gonna go get ready for

(10:56):
my meeting. I wanna wish you guys all
good health and happiness. I think tomorrow,
I'm going to release, my interview with Giovanni
for the lunchtime,
show. So it's about a thirty minute inter
interview, and I had a lot of fun
talking to Giovanni. And, again, if any of
you wanna come on the show and hang
out with me for a half an hour
or forty five minutes during lunchtime, just get
into contact with me. But I'm gonna keep

(11:17):
today's show a little bit shorter because I
have to run to another meeting. But with
that, I wanna wish you all good health
and happiness again. Until next time, my friends.
Peace.