Specifications

28 I/O Module Choices
1785-SO036C-EN-P - April 2002
1791D CompactBlock I/O modules The 1791D I/O modules (CompactBlock I/O) are designed for
applications that require I/O to be distributed close to sensors and
actuators or to be placed in small enclosures. The modules feature:
• self-contained package that provides cost-effective distribution of up
to 32 points per node
• small size that lets you install in shallow and confined areas
• hardware watchdog circuit
• DeviceLogix
TM
Smart Component Technology provides limited I/O
logic for intelligent I/O block
When you select 1791D I/O modules, the I/O circuits, a built-in power
supply, and a Remote I/O adapter are included. You must select an
enclosure and cabling components.
For more information about 1791D CompactBlock I/O, see the 1791D
Block I/O Technical Data, publication 1791D-TD001.
1790 CompactBlock LDX I/O
modules
1790 CompactBlock LDX I/O is a compact unit for monitoring and
controlling I/O in a location remote from the processor. Each block
contains I/O circuits, a built-in power supply and a built-in DeviceNet
I/O or PROFIBUS adapter. Similar to 1791D CompactBlock I/O, 1790
CompactBlock LDX I/O is a lower-cost option thanks to distinct
functionality and reduced environmental requirements. CompactBlock
LDX I/O also offers:
• lowest price per point DeviceNet I/O - integrated nature of block
allows for very low acquisition and maintenance costs
• space-saving capability - ideal for installation in the smallest of
enclosures in any orientation
• universal sink/source inputs
• compatibility with DeviceNet Auto Device Replacement feature
• expandability - up to three digital expansion modules per base block
with included ribbon cable (depending on catalog number)
• termination choices - D-shell connector for quick disconnect or
terminal strip with fixed screw termination
For more information about the family of CompactBlock LDX I/O
modules, see the CompactBlock LDX I/O Technical Data, publication
1790D-TD001.
I/O Module Choices
Features:
• very compact size
• includes power supply and adapter
• can place close to sensors and other
devices
• mount vertically or horizontally
Characteristic: Description:
Type of products available • digital
Communications • DeviceNet I/O, Remote I/O, PROFIBUS
Features:
• supports up to 64 I/O points per
node
• rotary node address switches and
autobaud simplify configuration
• polled, cyclic and change-of-state
DeviceNet operation
• mounts vertically or horizontally on
DIN-rail or panel mount
Characteristic: Description:
Types of products available • 24Vdc, 120Vac, relay contact, analog, RTD
and thermocouple
Communications • DeviceNet I/O, PROFIBUS