AutoGRAPH ON-BOARD CONTROLLER • USER MANUAL
23
TechnoKom © 2016
IMPORTANT
Inputs / Outputs
The I/O block is designed for monitor and measure parameters of external equipment and
devices, as well as for control various actuators and warning devices.
The I/O block is divided into three sections:
Digital inputs
These inputs have two states: «1» and «0» , and are able to show a change of input state,
count pulses and measure frequency.
The controller has the four active low inputs and 2 active high inputs.
In addition, analogue inputs of the controller can operate as digital inputs with the configurable
switching threshold.
Logic of the discrete inputs operation is shown in the table below:
Physical state of the input
Logic state of
active low input
active high input
High (connected to supply voltage)
1
1
Open-Circuit
1
0
Low (connected to ground)
0
0
Long-term exposure of the controller to the maximum values of the supply circuit may cause
irreparable damage to the protection circuits due to overheating or disruption. This may lead to
failure of the device. DO NOT exceed the maximum values stated. Operating voltage range and
maximum supply voltage values are specified in Technical Specifications section.
Note that logic states of the two inputs differ in open-circuit state (see the table above).
This must be taken into account when making connections.
IMPORTANT
Operation modes of the discrete inputs are fully programmable for each input and include:
•
Normal input
. In this mode, the digital inputs are monitored. When the input state
changes, the time and location data is stored into the device memory. Normal mode is useful
for recording the time of different sensors’ activation and for monitoring the performance of
equipment and mechanisms, such as an alarm button, oil pressure sensor, ignition system,
passenger presence sensor, security alarm triggering, opening of doors, limit switches of
various special-purpose and construction machinery mechanisms, etc. This mode also
enables the device to perform unscheduled transmission of data to the server via GPRS
upon input state changes, as well as to send an SMS message to the specified phone
number.
