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2TLC172001M0211_A
5 Connection of inputs
5.1 Dynamic
signals
The IQ terminals can be configured as dynamic outputs, and be used for voltage supply of the
input devices. If they are configured as dynamic, each of them generates a unique pulse train
as shown in the diagram below.
The system is intended for detection of different short circuits in external cabling, and dynamic
monitoring of sensors. It enables the connections of devices such as “SPOT” light beams,
EDEN sensors etc. that inverts the input signal.
In the software a configuration of the inputs must be made to decide which kind of input signal
each input shall accept as logic ”1”. Other signals that do not match with the configured signal
are regarded as ”0”.
5.1.1 Connection of inputs, I..
Input type I_ can be connected to; A, B, C, A-inverse, B-inverse, C-inverse or +24V.
The diagram below shows possible connections and how they are configured in the software.
NOTE:
The connections are only to show how devices can be electrically connected and are
not
to be taken as connections for any specific applications.
Dyn A, B or C
I_
I_
I_
IQ_
Configured as dynamic output
I_
I_
I_
Example of software declaration:
! Q0.10, a_pulse
Configured as dynamic input, not inverted
Example of software declaration:
! I0.0,a_pulse, non_inv
by either inverter or inverting safety device
Example of software declaration:
! I0.0,a_pulse
Direct connection to dynamic output
Connection to dynamic input with inversion
safety device with transistor outputs.
Direct connection to +24V or
! I0.0,static
Example of software declaration:
