Overview; Implications Of The Changes - Matrox 4Sight EV6 Installation And Hardware Reference

98 Appendix D: Migrating auxiliary I/O connections from Matrox 4Sight GPm to Matrox 4Sight EV6

Overview

Migrating an installation from a Matrox 4Sight GPm unit to a Matrox 4Sight EV6
unit comes with special considerations concerning the auxiliary I/O. Matrox
4Sight GPm implements sinking inputs and outputs at up to 24 Vdc in a
non-isolated manner (that is, each negative I/O pin is referenced to the electrical
ground plane of the unit); however, Matrox 4Sight EV6 implements
independently isolated industrial digital inputs and outputs, at up to 24 Vdc, with
independent support for both sinking and sourcing configurations. The
Matrox 4Sight EV6 isolated digital I/O implementation eases wiring, provides
increased flexibility when interfacing to industrial field devices of various types,
and provides better immunity in an industrial environment. Due to these changes,
some restrictions might apply when migrating from Matrox 4Sight GPm to
Matrox 4Sight EV6 and require you to verify and possibly re-wire I/O that will
be migrated.

Implications of the changes

Matrox 4Sight EV6 auxiliary inputs and outputs are electrically isolated from one
another and from the rest of the unit. The change from non-isolated digital I/Os
on Matrox 4Sight GPm to isolated digital I/Os on Matrox 4Sight EV6 has an
effect on the electrical specifications. The table below outlines the changes to
various specifications:
Electrical specifications
V (Voltage threshold at which
LMax
a low logical state is detected)
V (Voltage threshold at which
HMin
a high logical state is detected)
I (Minimum input operating
HMin
current)
Voltage drop across output pins
when in a closed state
(varies with current)
The Matrox 4Sight EV6 isolated digital I/O implementation also eliminates the
possibility for interfacing with TTL output devices.
 Note that verification is required before making use of pre-existing connections.
Matrox 4Sight GPm
0.9 V
1.5 V
10 μA
0.32 V
Matrox 4Sight EV6
8 V
10 V
2.25 mA
1.5 V