Technical data

February 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
analogue I/O. These modules are capa-
ble of connecting to AC or DC voltages
and also to voltage or current ana-
logue
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.
When used on same QCPort connec-
tion, both the I/O and the motor con-
trol can be connected to a single
network adapter. The network adapter
then represents the D77A I/O and
motor control as remote I/O, consum-
ing only one network address. The net-
work then controls and monitors the
QCPort devices.
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
T
o Control
P
C or PLC
D77D-DNA D77A I/O D77A I/O
QCPort
24V DC
IT.
Supply
IT. Starters with QSNAPs