Datasheet

Working principle/Operation
One sensor can be connected to the Basic/
Basic+ sensor board via local bus. The Sensor
board provides the power supply of the sensor
and prepares the measured data for digital
communication.
The operation menu of the Basic/Basic+ software
is accessed through the connected Gas Detection
Controller or via the dedicated GD Service
tool (or PC tool). The Service tool (or PC tool) is
plugged directly to the board of the unit. The
interfaces allow the unit conguration, setting
of the unit alarm levels and calibration of the
attached sensor.
The service tool (or PC tool) can be used on all
units across the Basic, Premium and Heavy Duty
platforms.
The alarm signals can be handled by the
Gas Detection Controller (or a PLC) via the
4-20 mA (2-10V) analog output or the RS485
open Modbus communication. For additional
operational safety the changing of parameters is
password protected allowing authorized access
only. The factory default password can easily be
customized.
The Basic/Basic+ gas detection units are
calibrated either by replacing of sensor heads or
by calibration with gas.
Plug & Play replacement sensors are pre-
calibrated and factory certied for quick and easy
calibration procedure. The sensor is connected
to the local bus via a plug connection enabling
easy and simple exchange of sensor instead of
an on-site calibration. The internal X-change
routine recognizes the exchanged sensor
during the exchange process and restarts the
measurement mode automatically. An LED
indicates the correct procedure of the exchange
operation. To ensure the proper functioning of
the units and to prevent human errors, the sensor
head can only be replaced by the same type
and ppm range (exact replacement) that match
the conguration. If a dierent sensor head is
installed, the GD unit will show a communication
error.
Service and maintenance As an alternative, calibration with gas can be
performed via the service tool (or PC tool),
calibration gas with correct concentration and
the Danfoss calibration adapter. The Danfoss
gas detection units have an integrated, digital
calibration interface and procedure, which
makes the calibration process easy, accurate, and
time-saving. No potentiometers or multi-meters
required for the calibration. The calibration
procedure requires signicantly less calibration
gas per calibration compared to traditional
routines.
Data sheet | Danfoss gas detection units, types GD Basic and Basic+
AI272545693488en-000303 | 3
© Danfoss | DCS (ms) | 2019.10