User manual

PCI-1752 User Manual 20
3.3 Isolated Digital Output Connections
Power On Configuration
Default configuration after power on, and hardware reset is to set all the
isolated output channels to open status
( the current of the load can’t be sink) so that users need not worry about
damaging external devices during system startup or reset.
When the system is hot reset, then the status of isolated digital output
channels are selected by jumper JP1. Table 3-2 shows the configuration
of jumper JP1.
Isolated Outputs
Each of isolated output channels comes equipped with a Darlington tran-
sistor. Every 16 output channels share common collectors and integral
suppression diodes for inductive loads.
Table 3.2: Power on configuration after hot reset
PCI-1752 JP1 Power on configuration after hot reset
Keep last status after hot reset
Load default configuration (Default setting)
Note: If an external voltage (5 ~ 40 V
DC
) is applied to
an isolated output channel 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 IDO pin
not exceed 200 mA.
1
1