1
Getting started
1.1
Overview
The
industrial digital output expansion board, embedding the
switch (IPS), is designed to meet the application requirement in terms of galvanic isolation between user interface
(or logic side) and power interface (or process side).
This requirement is satisfied by an optical isolation implemented through two couples of optocouplers:
1.
The first couple includes:
a.
ISO1: for signal forwarding to the device
and
b.
ISO2: for diagnostic signal (DIAG pin) feedback
2.
The second couple incudes:
a.
ISO3: for the additional output voltage feedback signal
and
b.
ISO4: for the additional circuitry driving Q1 to allow fast discharge of the output rail
The main features of the
expansion board are:
•
Based on
single high-side switch with the following main features:
–
Operating range up to 60 V/0.7 A
–
Low power dissipation (R
ON(MAX)
= 120 mΩ)
–
Fast decay for inductive loads
–
Open load detection and diagnostics
–
Overload and overheating protections with thermal shut-down and cut-off
–
PowerSSO-12L package
•
Application board operating range: 12 - 33 V, 0 to 0.7 A
•
Extended voltage operating range (J1 open) up to 60 V
•
Green LED for output ON/OFF status
•
Red LED for diagnostics (open load, cut-off and overheating)
•
3 kV galvanic isolation
•
Supply rail reverse polarity protection
•
Ready for Safety Digital Output Architecture
•
EMC compliance according to IEC61000-4-2, IEC61000-4-3, IEC61000-4-5
•
Wide application development potential in
•
Equipped with Arduino™ UNO R3 connectors
•
CE certified
•
RoHS and China RoHS compliant
1.1.1
Digital section
The digital and power sections are isolated by 3.3 mm creepage. Communication between the two sections is
guaranteed by ISO1, ISO2, ISO3 and ISO4 optocouplers.
UM2716
Getting started
UM2716
-
Rev 1
page 2/16
