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3.3.2 Isolated
Digital Output Connections
Each of 8 isolated digital output channels comes equipped with a Darling-
ton transistor. Every 8
output channels share common
collectors and inte-
gral suppression
diodes for inductive loads.
Channels 0 ~ 7 use
COM0,
and channels 8 ~ 15 use
COM1
as
a common pin. If an external
voltage (5
~
40 V) is applied
to an isolated output
channel (IDO 0 ~ IDO
15) while it
is
being used as an output channel,
the current will flow
from the external
voltage
source
to the card. Please
take care that
the current through each
GND pin
not exceed 100 mA.
Figure 3.3
shows how to connect an external output
load to the card's iso-
lated outputs.
Figure 3.3: Isolated Digital Output
Connections
15 Chapter 3