Conel CDA 70, Руководство пользователя

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CIO DESCRIPTION
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Log. number 1 1 to 254 Destination address of the first user interface where CIO-
generated report will be sent.
Log. number 2 1 to 254 Destination address of the second user interface where
CIO-generated report will be sent.
MinTime [msec] 0 to 6553500 Time hysteresis after which CIO may generate new report
The shortest period for transmitting the reports.
MaxTime [msec] 0 to 6553500 Period after which CIO always generates the report, even
when there is no change of an active signal.
NulTime [sec] 0 to 2550 A timeout for regular setting of outputs. See the NulTime
On parameter.
3.7. Connecting CIO signals to user device
It is not appropriate and often even possible to connect I/O interface signals directly to
the user device. To measure current, resistance, broader ranges of voltage, it is necessary to
insert electronic circuits, which adjust the measured quantities to voltage ranging from 0 to 5V
and also protect inputs against disturbing influences and dangerous overvoltage. Moreover, it
is also necessary to insert electronic circuits for operating the power parts of the user interface
because a transistor with the open collector is able to switch current up to 500mA and voltage
up to 20V.
Two additional CIO modules, which form an interface between a user's device and I/O
signals, are created for the practical use of I/O signals
Name Type Description
CIO ANI Analogue
input
Analogue differential input for small voltage, current and resistance
measuring. It includes differential amplifier with adjustable power 1 to
10000. Exact current source 0.1 to 3 mA can be used to measure
resistance. Configuration of the input signals, amplification and current
source is carried out through resistance net. Presence of the input
signal relevant to A/D converter working range is signalled by LED on
the front panel. Input circuits are protected against short-time over
voltage by suppressors and against the long-time one by a reverse
fuse.
Ranges of the measured values:
U 1V, U 2V, U 5V, U 10V, U 20V
I 5mA, I 10mA, I 20mA
Pt100 100
o
C, Pt100 200
o
C, Pt100 500
o
C
Resistance 100 to 50000 Ohm (METRA transmitter)
CIO OPI Binary
input
A single galvanic-separated digital input used for direct and alternate
signals up to 30V. It includes a bipolar opto-element that enables
processing of both input signal polarities. For AC signal, it includes