U-PAD2 A/D Converter
6 Tables and specifications
Fig 42: Standard U-PAD2 cable for two detectors
6.2 Parameters of digital inputs and outputs
Digital Outputs
The board contains two digital TTL outputs (OUT1 and OUT2) with
maximum permissible current of
20 mA
at both levels. Both digital outputs
are
also
designed
as
relay
contacts
(OUT1S1/OUT1S2
and
OUT2S1/OUT2S2).
The maximum permissible current is
100 mA
, the maximum- switched
voltage is
100 V
, and the contact resistance is
150 mΩ
. The relay is on-
state (closed) at level
LOW
of a relevant digital output.
Digital Inputs
The
U-PAD2
A/D converter contains two digital TTL inputs IN1, IN2.
Caution:
A resistor must be inserted (e.g. in the connector proper) to restrict the
diode current to
10 mA
max.
To suppress 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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