Ttl Inputs And Outputs; Watchdog; Fig. 8-8: Block Diagram Of The Ttl I/O - Addi-Data APCI-3010 Technical Description

APCI-3xxx
8.6

TTL inputs and outputs

The board APCI-3xxx has 24 TTL channels that are divided into three
ports:
8.7

Watchdog

A 16-bit watchdog is available for the analog outputs and for the 24 V
outputs. After its reload value (timeout) the watchdog resets the outputs.
When the watchdog is released, with each setting of the outputs the reload
value is reloaded (triggering). The triggering also can be done directly
through software command without resetting the outputs.
The operating mode can be read back. As time bases for the watchdog three
different clock signals (μs, ms, s) can be used. You can select to release the
wtachdog's status on the 24 V- outputs 1 and 2.
Table 8-1: TTL I/O (ports)
Port Description
Output
Port 0
Input
Port 1
Programmable I/O
Port 2

Fig. 8-8: Block diagram of the TTL I/O

Functions of the board
Channel
Channel 0-7
Channel 8-15
Channel 16-23
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