Atest Gaz PW-033-B, User Manual

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1.2 Operation principle
The Control Unit Module Sigma MOD LCD scan statuses of detectors connected to the gas monitoring
system and read their indications. That information is depicted by means of indicating LEDs. The measured
values of gas concentration as well as other special signals (e.g. defects) are used to control relay outputs of
the unit. Specifically, these outputs may activate various sound and visual warning devices. The Control Unit
Module reads statuses of binary inputs (both electric digital inputs (DI) and logic External Digital Inputs) and
then, based on these inputs, control the system behaviour (activates or de-activates outputs of the
controller).
The system image is made available to external clients by means of the RS-485 digital link with the MODBUS
protocol. The link enables connection to external automation systems or mimic boards. In turn, the user
interface is used by a system operator to give commands to the gas monitoring system or adjust parameters
of its operation.
The entire system is developed on the base of the most advanced electronic solutions and the manufacturer
made all possible efforts to achieve the top quality and reliability of its solutions.
1.3 Device characteristics
Key functionalities:
handling up to 32 gas detectors,
8 relay outputs,
4 binary inputs,
presentation of the gas detectors status (operation, exceeding the thresholds, its special
conditions and diagnostic status),
presentation of historical states (exceeding the thresholds, failures),
control of the entire system operation.
The control unit module is designed to collaborate with:
Line 4.0 Gas Detectors,
Control Unit Module Sigma MOD DRV,
other devices compatible with the built-in input-output interfaces.
Control Unit Module Sigma MOD LCD is designed for installation in control rooms, inside
control cabinets and other locations inside buildings. They are not suitable for operation is
potentially explosive atmospheres.
Control Unit Module Sigma MOD LCD offer vast opportunities of configuration. However, to
simplify understanding of this manual, many functionalities are described based on the
default configuration.
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User Manual: POD-003-ENG R04