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APCI-1032, APCI-1564 and APCI-2032
4 ground lines are available for the inputs:
GND 0 for the inputs 0-7 (module 0)
-
GND 1 for the inputs 8-15 (module 1)
-
GND 2 for the inputs 16-23 (module 2)
-
GND 3 for the inputs 24-31 (module 3)
-
The required current input is 6 mA at nominal voltage.
WARNING !
If you operate all inputs with the same voltage supply, the
voltage supply must deliver e.g. at least 32 x 6 = 192 mA at
V
ext. = 24 V.
cc
The maximum input voltage is 30 V / 9.6 mA typical.
Transil diodes, Z diodes, LC filters and opto-couplers protect the system bus from noise
emitted by the peripheral. The effects of inductive and capacitive noise are thus
reduced.
The board requires no initialisation to read the 24 V digital information. After
successful power ON, data is immediately available on the board.
8.2.2 Special functions: interrupt
The inputs 0 to 15 (APCI-1032) or 4 to 19 (APCI-1564) can generate an interrupt. This
function allows to mask OR or AND events at rising/falling edge or at high/low level.
The different functions to control the IRQ logic are the following (set by software):
Enable/disable of the interrupt function
-
Switch between AND/OR logic
-
Interrupt source can be read back
-
IRQ status register can be read back
-
Programming of the interrupt function through 2 registers with which the
-
events are masked (Hex):
Fig. 8-4: Protection circuitry for the inputs
Functions of the board
45
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