Polon-Alfa CDG 6000, Эксплуатационная и техническая документация

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14 ID-E364-001
5. External circuits connection
5.1. Detector line
Name Purpose
PD+
PD-
Detectors line end input
LD+
LD-
Detectors line input
E Display input
The detectors for detected gases are connected with the CDG control panel using specially designed
detection line. Each detector is assigned with unique address. The control panel may therefore
display state of each detector.
The detectors line may operate in two modes, as a radial or loop line. In the loop line mode, the line
end is connected with the control panel. The system is thus able to operate correctly even with line
breakage in one place.
The line is also immune to short circuits. The detectors are equipped with insulators which separate
the short circuit in such a way to assure operability of the maximum number of detectors.
When connecting detector line wires to the control panel, pay utmost attention to the line polarity as
well as correct cable screen connection with appropriate terminal.
5.2. Control relays outputs
Name Purpose
NO Normally open terminal (disabled)
C Common terminal
NC Normally connected terminal
(enabled)
The control panel is equipped with four universal relay outputs for control devices. The relay outputs
are potential-free and can handle direct and alternating current
5.3. Control inputs
Control inputs can receive alarms from external devices and control operation of devices controlled
directly by the control panel. Control inputs are parametric inputs. Apart from short circuit and
opening detection, the inputs distinguish 3 resistance ranges. This allows for full input control which
results in a connection with external device that is fully resilient to damage.