Clarity INT9 - Manual (Page 45)

6 Tables and Specifications Clarity Hardware
Fig 44: Standard INT7-compatible cable for two detectors
6.2 Parameters of digital Inputs and Outputs
Digital Outputs
The card contains eight digital TTL outputs (OUT1-OUT8) with maximum
permissible current of 20 mA at both levels. The first four outputs are also
designed as relay contacts (OUT1S1/OUT1S2- OUT4S1/OUT4S2).
The maximum permissible current is 100 mA, the maximum- switched
voltage is 100 V and the contact resistance is 150 mΩ. The relay is
onstate (closed) at level LOW of a relevant digital output.
Digital Inputs
The board contains four digital TTL inputs IN1 to IN4.
To suppress the contact bouncing the digital inputs are equipped with
monostable toggles that prolong any change affecting the input to at least
200 ms (to ensure that the station is able to detect it).
A pulse with duration of at least 1 ms is necessary to excite the toggles.
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