Danfoss gas detection units - Types GD Basic and Basic+ Data Sheet

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Danfoss gas detection units - Types GD Basic and Basic+ Data Sheet | Manualzz

Data sheet

Danfoss gas detection units

Types GD Basic and Basic+

The Basic and Basic+ gas detection units are used for monitoring and warning of hazardous gas concentrations. They can be used for detecting commonly used refrigerants. Depending on the application, they are available with an electrochemical or a semiconductor sensor.

The Basic and Basic+ gas detection units are intended to be connected to a central system like

Gas Detection Controller Unit, or a PLC, by either

Analog or RS485 open Modbus communications.

The central system converts the alarm signal from the Basic unit to activation of alarm devices.

The gas detection units come with a factory default, 2-step alarm set-up ready for use. The integrated software enables the user to configure two individual alarm ranges. Alarm 1, a pre-alarm indicating the gas level has passed a predefined treshold 1, and - if the gas level passes predefined treshold 2 - the final alarm 2.

Features

© Danfoss | DCS (MWA) | 2018.09

• Digital, factory configured and pre-calibrated gas detectors for plug-and-play installation (no adjustment required)

• Easy configuration via intuitive user-interface; helps simplify operator handling and minimize risk of operational, settings and calibration errors

• Flexible connection - by either Analog or RS485 open Modbus communications

• Fieldbus wiring - connect and power up to 96 sensors, wire length max. 900 meter per segment; expansion modules permits additional segments

• Automatic self-diagnostics to ensure correct communication and operation

• Sensor seal cap to prevent premature exposure during installation

• Digital user interface ensures higher sensor accuracy

• Reduced risk of false alarms due to temperature compensated sensors

• Password protected alarm settings allowing authorized access only

• LED status signals and alarms

• Buzzer & Light option for local audio and visual alarms (Basic+)

• On-board acknowledge button to reset alarms and to verify the that no gas leaks are present

• Service alerts on unit, controller or both, readable via service tool Display

• Quick and precise calibration procedures - either by Plug & Play replacement sensors or calibration with gas. No potentiometers or multi-meters required

• For improved safety and to optimize the lifetime of the sensor, degenerated sensors with too low sensitivity (<30%) are rejected during calibration process.

• Conformity to EN 50271, EN 61010-1, ANSI/UL

61010 1, CAN/CSA-C22.2 No. 61010-1

• Enables regulatory compliance with EN

378:2016, ISO 5149:2014, IIAR 2-2017, and

ASHRAE 15:2016

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Data sheet | Danfoss gas detection units, types GD Basic and Basic+

Contents Page

Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Working principle/Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Service and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Fieldbus loop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Gas types and thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Alarm scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

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Data sheet | Danfoss gas detection units, types GD Basic and Basic+

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 configuration, 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.

Service and maintenance The Basic/Basic+ gas detection units are calibrated either by replacing of sensor heads or by calibration with gas.

Plug & Play replacement sensors are precalibrated and factory certified 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 configuration. If a different sensor head is installed, the GD unit will show a communication error.

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 significantly less calibration gas per calibration compared to traditional routines.

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Data sheet | Danfoss gas detection units, types GD Basic and Basic+

Specifications

Electrical

Power supply

Power consumption (24 V DC)

Outgoing line local bus

Power supply

19 – 29 V AC/DC, DC reverse-polarity protected

Max. 250 mA (6 VA)

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

Serial interface

Local bus

Fieldbus

Tool bus

Analog output signal

Proportional, overload and short-circuit proof, load ≤ 500 Ohm

4 - 20 mA = measuring range

3.0 < 4 mA = underrange

> 20 - 21.2 mA = overrange

2.0 mA = fault

Status LED / Buzzer & light (only Basic+)

Colour

Acoustic pressure

Frequency

Protection class

1-wire / 19200 baud

RS 485 / 19200 baud

2-wire / 19200 baud

General

Temperature range

Humidity range

Storage temperature

Storage time

Physical

Housing

Material

Burning behaviour

Housing colour

Dimensions (W x H x D in mm)

Weight (kg)

Protection class

Installation

Cable entry

Wire connection:

Power supply, fieldbus

-30 °C to +50 °C (-22 °F to 122 °F)

15 - 90 % RH not-condensing

+5 °C to +30 °C (41 °F to 86 °F)

12 months

Type A

Polycarbonate

UL 94 V2

Black

94 x 130 x 57

Approx. 0.3kg (0.8 lbs.)

IP 65

Wall mounting

2 x M12 / 3 x M20

Analog output

Local bus for sensor

Cable lengths local bus for remote sensor board

Screw-type terminals 0.25 to 2.5 mm2

(25 AWG to 14 AWG)

Screw-type terminals 0.25 to 1.3 mm2

(25 AWG to 17 AWG)

3-pin plug connector

Max. 5 m (16.4 ft.)

Directives

EMC directives 2014/30/EU

CE

Conformity to EN 50271, EN 61010-1

ETL listed to UL 61010-1 and CSA C22.2 No.61010-1

Enables regulatory compliance with EN 378:2016, ISO 5149:2014, IIAR 2-2017, and ASHRAE 15:2016

3 color light: Green, yellow, red

> 85 dB (A) (0.1 m distance)

2300 Hz

IP 65

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Data sheet | Danfoss gas detection units, types GD Basic and Basic+

Electrical connection

JP4*

Open: 4-20mA

5

4

GND

AO_01

X1 Analog Output

Status LED

Green/Yellow/Red

Ackn. -/Test button T1

X9

Service Tool

Jumper

J1

J2

J3

0 V DC

24 V DC

Buzzer &

3-light alarm

Status LED:

GREEN is power on.

- flashing if maintenance needed

YELLOW is an indicator of Error.

- when the sensor head is disconnected or not

the expected type

- AO is activated but nothing connected

- flashing when sensor is in special mode

(e.g. when changing parameters)

RED on alarm, similar to the buzzer & light alarm.

Ackn. -/Test button:

TEST - The button must be pressed for 20 sec.

- Alarm1 and Alarm2 is simulated, stop on

release

ACKN. - Pressed while Alarm2, the audible warning switches off and goes back on after

5 min. when the alarm situation is still active.

* JP4 open → AO 4-20 mA (Default)

JP4 closed → AO 2-10 Volt

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Data sheet | Danfoss gas detection units, types GD Basic and Basic+

Fieldbus loop Each GD controller can handle up to 96 sensors and handle any mix of individual Gas detection units of the types Basic, Premium and Heavy

Duty.

The max. recommended loop wire length is 900 meter (2953 ft) per segment.

With additional segments (and additional controller expansion modules) the max recommended loop wire length is 7200 meter

(23622 ft).

The controller and the last GDU in each segment must be provided with a resistor of 560 Ohm.

A Umin of 16 V DC must be secured at any spot in the loop.

Below figure shows how to make proper connections between the controller and each

GDU.

560 R

2

1

4

3

2

1

4

3

Controller unit

0 V DC

24 V DC

BUS_B

BUS_A

0 V DC

24 V DC

2

1

4

3

2

1

4

3

2

1

4

3

U min

= 16 V DC

Controller unit

R

Wire length max. 900 meter (2953 ft) per segment.

Additional power limitations must be calculated.

R

R

R

Controller unit

R

Danfoss

148H123_03-2018

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Data sheet | Danfoss gas detection units, types GD Basic and Basic+

General information • Cable gland not mounted but enclosed

• 4 mounting ears included

• Sensor head mounted bottom right

• Alarm device (Buzzer & Light) mounted bottom left (only Basic +)

Basic Basic +

Gas types and thresholds

Sensor

Ammonia EC 100

Ammonia EC 300

Sensor Type

Electrochemical

Electrochemical ppm range

0-100

0-300

Ammonia EC 1000

Ammonia SC 1000

HFC R404A, R507 SC2000

Electrochemical

Semiconductor

Semiconductor

0-1000

0-1000

0-2000

Hysteresis = 5% of Alarm1 (rounded up to the next higher integer)

Alarm 1

25 ppm

25 ppm

500 ppm

500 ppm

500 ppm

Alarm 2

35 ppm

150 ppm

900 ppm

900 ppm

900 ppm

Hysteresis

2 ppm

2 ppm

25 ppm

25 ppm

25 ppm

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Data sheet | Danfoss gas detection units, types GD Basic and Basic+

Alarm scheme

WAO

Buzzer &

3-light alarm

Very fast blinking (0.1 sec.)

Buzzer on

If ackn. button pressed after Alarm

If ackn. button pressed during Alarm2

If ackn. button not pressed

Time delay*

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Data sheet | Danfoss gas detection units, types GD Basic and Basic+

Ordering

Spare parts and accessories

Type

GDA

GDHF

Model

Basic

Basic+*

Basic

Basic+*

Basic

Basic+*

Basic

Basic+*

Basic

Basic+*

* incl buzzer & Light

Refrigerant

Ammonia

Ammonia

Ammonia

Ammonia

Ammonia

Ammonia

Ammonia

Ammonia

R404a, R507a,

R32, R125, R407c,

R434a, R488a,

R125

R404a, R507a,

R32, R125, R407c,

R434a, R488a,

R125

Sensor

Electrochemical

Electrochemical

Electrochemical

Electrochemical ppm range

0-100

0-100

0-300

0-300

Electrochemical 0-1000

Electrochemical 0-1000

Semiconductor 0-1000

Semiconductor

Semiconductor

0-1000

0-2000

Semiconductor 0-2000

Alarm ppm

25/35

25/35

25/150

25/150

500/900

500/900

500/900

500/900

500/900

Temp. Range

[°C]

-30 to +50

-30 to +50

-30 to +50

-30 to +50

-30 to +50

-30 to +50

-10 to +50

-10 to +50

-10 to +50

Temp. Range

[°F]

-22 to 122

-22 to 122

-22 to 122

-22 to 122

-22 to 122

-22 to 122

14 to 122

14 to 122

14 to 122

Code number

148H6000

148H6001

148H6008

148H6009

148H6014

148H6015

148H6023

148H6024

148H6045

500/900 -10 to +50 14 to 122 148H6046

Description

Replacement sensor - Ammonia EC 100

Replacement sensor - Ammonia EC 300

Replacement sensor - Ammonia EC 1000

Replacement sensor - Ammonia SC 1000

Replacement sensor - HFC R404A, R507 SC 2000

Controller unit

Controller solution (controller + enclosure)

Warning module (wire break monitoring module)

Controller expansion module

Service tool

PC tool

Calibration adapter

Buzzer & light - acoustic buzzer and optic led

Air duct set

Seal cap

Splash guard

Gateway for controller

Code number

148H6200

148H6201

148H6202

148H6203

148H6210

148H6231

148H6221

148H6223

148H6222

148H6224

148H6235

148H6232

148H6225

148H6236

148H6227

148H6226

148H6228

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Accessories overview Controller unit

Used for a centralized monitoring and warning.

The input signals for the controller are collected via RS485 Modbus or analog communication.

The controller can handle up to 96 digital sensors via Fieldbus and four (4) analog input.

An additional 28 analog input is possible using seven (7) expansion modules (4-20 mA signal interface). The total number of connected sensors should not exceed 128 sensors. The controller unit can be employed as pure analog controller, as analog/digital, or as digital controller. Configuration is menu-driven via the keypad. For fast and easy configuration, the PC

Tool is recommended.

Controller solution

Controller unit placed in an enclosure ready to be connected to a power source. A separate UPS for the controller is available.

Buzzer & light - acoustic buzzer and optic led

Can be installed in Basic or Premium units providing a local alarm.

Warning module (wire break monitoring module)

The warning module is used for monitoring the circuiting to the warning/alarm devices on a centrally controlled gas detection system. Wire breaks or wire interruptions in the alarm device loop will be reported to the central control.

Controller expansion module

The gas detection Controller Expansion module is used for expansion of the cable coverage in terms of number of loops and the total wire length. Each Controller Unit can handle up to

7 Expansion modules allowing additional 7 segments with a total of 7200 meters (23622 ft.) wiring and a total of 32 relays for alarm device circuits.

PC tool

The PC tool is a menu-driven and standalone software used for easy addressing, parameter setting, calibration, and data logging of the

Basic, Premium and Heavy Duty gas detection units, and the controller unit.

Calibration adapter

The calibration adapter is required for connecting the calibration gas container, via the flow regulator, to the sensor head on the gas detection units. (Two variants, One for Basic and

Premium plastic head sensors; one for heavy duty and Premium remote metal head sensors.).

Air duct set

The air duct set is specially designed to capture the airflow in air ducts. It can be connected to the standard sensor heads, except from Heavy

Duty gas detection units.

Seal cap

Airtight seal cap to protect the sensor head against premature exposure during installation.

The seal cap is mounted on new sensors

(complete units and replacement sensors) but is also available as an accessory.

Splash guard

To protect the sensor head against water exposure during wash-down cleaning and rinsing operations.

Service tool

For interface with units with no display (Basic,

Basic+, Premium, Premium+). Acts as a portable display and can be connected to all Danfoss gas detection units. (Heavy Duty w. adapter).

Gateway for controller

The gateway is an addition to the controller and used for communicating via Modbus TCP/IP.

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Questions and Answers

What is the purpose of the GD Basic and Basic+ gas detection units?
The GD Basic and Basic+ units are used for monitoring and warning of hazardous gas concentrations. They can be used for detecting commonly used refrigerants, and are intended to be connected to a central system like Gas Detection Controller Unit, or a PLC.
What types of sensors can be connected to the gas detection units?
Depending on the application, the units can be equipped with either an electrochemical or a semiconductor sensor.
How many alarm ranges can be configured on the gas detection units?
Each unit can be configured with two individual alarm ranges: Alarm 1 is a pre-alarm indicating the gas level has passed a predefined threshold 1, and Alarm 2 is the final alarm if the gas level passes a predefined threshold 2.
How are the gas detection units powered?
The units are powered by a 19 - 29 V AC/DC power supply, with reverse-polarity protection.
What is the maximum power consumption of the gas detection units?
The maximum power consumption is 250 mA (6 VA) at 24 V DC.
What types of communication interfaces do the units have?
The units have the following communication interfaces: Analog output (4-20 mA or 2-10V), RS485 open Modbus communication, Local bus for sensor, and Tool bus (2-wire / 19200 baud).
What is the maximum cable length for the local bus connecting the sensor board?
The maximum cable length for the local bus connecting the sensor board is 5 meters (16.4 ft.).
How are the gas detection units calibrated?
The units can be calibrated either by replacing the sensor heads or by calibration with gas using the Danfoss calibration adapter and calibration gas with the correct concentration.

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