Section 8: Using The Isolated Digital I/O; The Isolated Digital I/O Defined - IMS MicroLYNX Quick Manual

Using The Isolated Digital I/O
T h e I s o l a t e d D i g i t a l I / O D e f i n e d
The
of the I/O, it is HIGH if it is
5 to 24 VDC, or LOW if it is 0 VDC. The
STATE is read as a "1" or a "0" where "1" is
considered to be Active/ON and "0" is
considered to be Inactive/OFF as
determined by the LEVEL of the I/O
and how the I/O was defined to
respond to that Level
The active HIGH/LOW state is configured by the third parameter of the IOS
variable, which is explained further on. The goal of this I/O configuration
scheme is to maximize compatibility between the MicroLYNX and standard
sensors and switches.
T h e P i n C o n f i g u r a t i o n o f t h e I s o l a t e d I / O
The following figure illustrates the pinout of I/O group 20:
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The MicroLYNX comes standard with a set of
LEVEL is the voltage
The isolated digital I/O may be defined as either active HIGH or
active LOW. When the I/O is configured as active HIGH, the
level is +5 to +24VDC and the state will be read as a "1". If the
level is 0 VDC, then the state will be read as "0". Inversely, if
configured as active LOW, then the state of the I/O will be read as
a "1" when the level is LOW, and a "0" when the level is HIGH.
MICRO
TM
Figure 8.1: Isolated I/O Pin Configuration
six (6) +5 to +24VDC I/O lines which may
be programmed individually as either
general purpose or dedicated inputs
or outputs, or collectively as a
group. The isolated digital I/O
may also be expanded to twenty-
four (24) lines in groups of six (6).
The I/O groups and lines are
numbered in the following fashion:
Group 20 = Lines 21 - 26 (Standard)
Group 30 = Lines 31 - 36 (Optional)
Group 40 = Lines 41 - 46 (Optional)
Group 50 = Lines 51 - 56 (Optional)
V PULLUP
I/O LINE 21
I/O LINE 22
I/O LINE 23
I/O LINE 24
I/O LINE 25
I/O LINE 26
I/O GROUND
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