Digital Outputs; Special Functions - Addi-Data ADDINUM CPCI-1500 Technical Description

Technical description
8.2.2

Digital outputs

The board supplies 16 optically isolated outputs.
The outputs comply with the 24 V industry standard (IEC1131-2):
The positive logic is used
- logic "1": sets the output by software (switch on ON),
- logic "0": resets the output (switch on OFF).
The outputs switch the +24V ext. outside to the load. One end of the load is
connected with the ground of 0V EXT (outputs).
All outputs have a common ground: 0V ext. (outputs) pin 29 of the 37-pin SUB-D
male connector.
WARNING!
If you use all outputs with the same voltage supply,
the voltage supply must deliver at least the power required for
your application.
The maximum supply voltage is 36 V. Each output can switch 500 mA current. But
the current is limited for all the outputs on approx. 3 A by a self-resetting fuse.
Features of the outputs:
- Short-circuit current for the 16 outputs
- Protection against overtemperature: shut down logic. Each group of 4 outputs is
switched off: 1 to 4, 5 to 8, 9 to 12, 13 to 16.
- The outputs are switched off if the ext. supply voltage drops below 5 V.
- Diagnostic report through status register or interrupt to the PC in case of
short-circuit, overtemperature, voltage drop or watchdog.
Transil diodes, C filters and optical couplers filter noise from the peripheral to
the system bus. Thus the effects of inductive and capacitive noise are reduced.
Possible noise emissions are also reduced by C filters.
The board requires no initialisation to output the 24V digital information. You
can program the outputs immediately after successful power ON reset
State after power ON reset : all the outputs are reset (switch on OFF).

Special functions:

2 diagnostic bits are available on the board.
The
- when short-circuit has occurred on an output or
- in case of overtemperature on an output component (8 channels).
The V
- the external voltage supply has dropped < 5 V.
32
Chapter 8
ϑ
-diagnostic (Pin 19 on the front connector) is released:
-diagnostic informs that:
cc
APCI-/CPCI-1500