Danfoss DGS-SC HFC, DGS-PE, DGS-IR Data sheet

Data Sheet

Gas detecting sensor
Type DGS

Refrigerant gas detection for safeguarding commercial buildings.

DGS sensors can be used in stand-alone or
integrated systems, where continuous real­time, automatic monitoring with Danfoss
ADAP-KOOL® Refrigeration Control &
Monitoring System and/or Building
Management Systems is applied.

DGS supports our customers in complying with
environmental F-Gas Regulations and Health &
Safety requirements on new or existing systems
in:

• supermarkets

• process refrigeration plants

• refrigerated storage and warehousing

• special application areas/zones

Typical refrigerant gas applications include:

• halocarbons: HFCs, HCFCs, CFCs

• carbon dioxide (CO₂/R744)

• hydrocarbons (e.g. R290)

• other special application gases to customer
request

Sensing technology varies to make the best
detection for a given gas, in terms of
performance and cost. DGS-IR is based on infra­red sensor technology, DGS-SC is based on
semi-conductor and DGS-PE is based on
pellistor.

AI227786437234en-000501

Power supply

24 V DC ± 20 % ; reverse polarity protected
24 V AC - 10 % / + 15 %

Power Consumption (24 V DC)

Max. 250 mA (5 VA)

Digital input

Alarm acknowledge and test alarm: Potential-free contact
Alarm relay /fault relay: 40 V AC/DC, 0.5 A, change-over contact (SPDT)
Critical relay: normally closed (SIL II compliant), warning relay: normally open

Analogue output signal

Proportional, overload and short-circuit proof, load ≤ 500 Ohm
Measuring range: 0 – 10 V / 2 – 10 V / 0 – 20 mA / 4 – 20 mA

MODBUS Physical

5 V DC, 250 mA max. overload, short-circuit and reverse-polarity protected

Enclosure rate

IP 65

Humidity range

15 – 90 % RH not-condensing

Burning behaviour

UL 94 V2

Housing colour

Black

Dimensions (W x H x D in mm)

94 x 130 x 57

Installation

Wall mounting

Cable entry

2 x M12 / 3 x M20

Wire connection:

Power supply, MODBUS: Screw-type terminals 0.25 – 2.5 mm

2

Analogue output, Digital input: Screw-type terminals 0.25 – 1.3 mm

2

Sensor head: 3-pin plug connector

Sensor information

DGS-IR (CO2)

DGS-SC (HFC)

DGS-PE (Propane)

Temperature range

-35 – 50 °C

-35 – 60 °C

-30 – 60 °C

Response time T90

<120 sec.

<40 sec.

<10 sec.

Recovery time, T0

90 sec.

180 sec.

120 sec.

Maximum calibration interval

60 months

12 months

6 months

Measuring range

0 – 20000 ppm

0 – 2000 ppm

0 – 5000 ppm

Default alarm threshold

5000 ppm

500 ppm

800 ppm

Compliance

EN61010-1

No61010-1

B&L - Buzzer and Light (option by
product selection)

Light (LED): Red / yellow /green (alarm - fault - operation - service)
Buzzer: >85 dB (A) (0.1 distance ) 2300 Hz

Gas detecting sensor, type DGS

Product specication

Technical Data

Table 1: Technical data

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