ABB Discrete I/O, Applications Manual

Page: 13 / 58

1 Introduction
General
Discrete I/O is a modular, compact, and scalable I/O system that consists of a base
device, which is the minimum configuration, and add-on devices. Up to four add-on
devices can be controlled by each base device with maintained performance, and
any combination of add-on devices is supported. When the I/O device is installed
inside the controller, then it is referred to as
Local I/O or Internal I/O . When installed
outside the controller, then it is referred to as External I/O or Remote I/O .
The base device communicates over the EtherNet/IP communication protocol to
the robot controller or to other EtherNet/IP scanners. Up to 20 devices in total can
be connected to the robot controller over EtherNet/IP, this includes base devices
and other third-party I/O devices.
When using the standard Plug & Produce interface no additional RobotWare options
or hardware options are required to connect to the robot controller. When using
the RobotWare option
EtherNet/IP Scanner/Adapter more configuration possibilities
are available.
The add-on devices have an optical interface and must be attached to a base
device. The additional Ethernet port on the base device can be used to daisy chain
any Ethernet based equipment on the same network, for example additional base
devices.
The I/O devices are designed to be mounted vertically on a mounting rail in an
IP20 protected environment with normal air convention. Forced air is needed if the
devices are mounted horizontally.
Features
The important features of the Discrete I/O devices are following:
• Easy to install.
• Easy to configure in RobotWare with support of the new Plug & Produce
interface.
• Compact and scalable.
• Can be mounted inside the controller and/or distributed outside.
• Supports standard DIN-rail mounting.
• Galvanically isolated add-on devices.
• Dual port switch for Daisy chaining.
Application manual - Discrete I/O 13
3HAC070208-001 Revision: C
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1 Introduction