Technical data

May 2007
38
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PLC, I/O & Communications Products
IT. Connect
Remote I/O Modules (D77A Series)
Product Description
Cutler-Hammer
®
Intelligent Technolo-
gies (IT.) D77A I/O Modules, which are
built by Eaton’s electrical business for
industrial applications, are available in
8 and 16 point I/O, combination I/O and
analog I/O. These modules are capable
of connecting to AC or DC voltages
and also to voltage or current analog
I/O. Input modules have two points per
isolated common while the outputs
are available in relay and solid-state
with two points per isolated common
for most output modules. When added
flexibility is needed, modules that
combine inputs and outputs, AC, DC
and relay are available.
Application Description
Typical D77A I/O Module applications
use the D77A I/O as stand-alone
remote I/O and in a system where
motor control and I/O are required
within a single customer panel.
I/O and the motor control can be con-
nected to a single network adapter.
The network adapter then represents
the D77A I/O and motor control as
remote I/O, consuming only one net-
work address. The network then con-
trols and monitors the connected
devices. Connecting devices is done
by DIN rail back plane or by Plug-and-
Play cables.
Figure 41. Application — Distributed I/O and Motor Control
IT. I/O Products D77A-DQ8, D77A-DI8
and D77A-AQ8 with DeviceNet
Adapter, D77D-DNA
To Control
PC or PLC
D77D-DNA D77A I/O D77A I/O
IT. Starters with QSNAPs