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Gas Detection
User guide
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Danfoss Gas Detection User guide

User Guide
Danfoss Gas Detection
Controller unit and Expansion module
GDIR.danfoss.com
Contents Page
1 Intended use .....................................................................................4
2 Description .......................................................................................4
2.1 Normal Mode ...............................................................................4
2.2 Alarm Mode ................................................................................4
2.3 Special Status Mode.........................................................................4
2.3.1 Fault Mode................................................................................5
2.3.2 Restart Mode (Warm-up Operation)........................................................5
2.3.3 Service Mode .............................................................................5
2.3.4 UPS Functionality .........................................................................5
3 Wiring configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4 Operation ........................................................................................7
4.1 Function of the keys and LEDs on the keypad ................................................7
4.2 Setting / changing of parameters and set points .............................................7
4.3 Code Levels.................................................................................8
5 Menu Overview...................................................................................9
5.1 Fault Management........................................................................ 10
5.1.1 Acknowledge a Fault ....................................................................10
5.1.2 Error Memory ........................................................................... 10
5.1.3 System Messages and Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2 Status Alarm .............................................................................. 13
5.3 Relay Status............................................................................... 13
5.4 Menu Measuring Values ...................................................................13
5.5 Maintenance Information ................................................................. 14
5.6 Display Parameter......................................................................... 15
5.6.1 Software Version ........................................................................ 15
5.6.2 Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.6.3 Service Phone Number .................................................................. 16
5.6.4 System Time, System Date ............................................................... 16
5.6.5 Error Time Delay......................................................................... 16
5.6.6 X Bus Slave Address ..................................................................... 16
5.7 Parameters................................................................................17
5.7.1 Display Parameter ....................................................................... 18
5.7.2 Menu Relay Parameter................................................................... 19
5.7.2.1 Relay Mode............................................................................ 20
5.7.2.2 Relay Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.7.2.3 Relay Function Static / Flash............................................................ 20
5.7.2.4 Alarm Trigger Quantity................................................................. 20
5.7.2.5 Horn Function (not safe output circuit because resettable) ..............................20
5.7.2.6 External Override of Alarm / Signal Relay via DI ......................................... 21
5.7.2.7 External Override of Alarm / Signal Relay via DI ......................................... 21
5.7.2.8 OR Operation of Fault to Alarm / Signal Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.7.2.9 OR Operation of Maintenance to Alarm / Signal Relay ..................................22
5.7.3 Menu MP Parameters.................................................................... 23
5.7.3.1 Activate – Deactivate MP............................................................... 25
5.7.3.2 Lock or Unlock MP .....................................................................25
5.7.3.3 Selection Gas Type with Unit ...........................................................25
5.7.3.4 Measuring Range Definition ........................................................... 25
5.7.3.5 Threshold / Hysteresis..................................................................26
2 | BC272555441546en-000201
© Danfoss | CLimate Solutions | 2022.03
User Guide | Danfoss Gas Detection - Controller unit and Expansion module
Contents Page
5.7.3.6 Delay for Alarm ON and/or OFF for Current Value Evaluation ............................26
5.7.3.7 Average Overlay (VDI 2053 Functionality)............................................... 26
5.7.3.7 Latching Mode Assigned to Alarm ..................................................... 26
5.7.3.8 MP Fault Assigned to Alarm ............................................................26
5.7.3.9 Alarm Assigned to Alarm Relay......................................................... 26
5.7.3.10 MP Signal Assigned to Analog Output................................................. 26
5.7.4 Menu System Parameters................................................................ 27
5.7.4.1 System Information.................................................................... 27
5.7.4.2 Maintenance Interval .................................................................. 27
5.7.4.3 Power On Time ........................................................................ 27
5.7.4.4 Analog Output ........................................................................ 28
5.7.4.5 Relay Multiplication.................................................................... 29
5.7.5 Test Function of the Alarm and Signal Relays ............................................. 30
5.7.6 Test Function of the Analog Outputs ..................................................... 30
© Danfoss | CLimate Solutions | 2022.03
BC272555441546en-000201 | 3
1 Intended use
2 Description
The Danfoss gas detection controller unit is controlling one or multiple gas detectors, for monitoring, detection and warning of toxic and flammable gases and vapours in the ambient air. The controller unit meets the requirements according to EN 378 and the guidelines “Safety requirements for ammonia (NH3) refrigeration systems”.
The controller unit is a warning and control unit for the continuous monitoring of different toxic or flammable gases and vapours as well as of HFC and HFO refrigerants. The controller unit is suitable for the connection of up to 96 digital sensors via the 2-wire bus. Up to 32 analog inputs for the connection of sensors with 4 to 20 mA signal interface are available in addition. The controller unit can be employed as pure analog controller, as analog/digital or as digital controller. The total number of connected sensors, however, may not exceed 128 sensors.
Up to four programmable alarm thresholds are available for each sensor. For binary transmission of the alarms there are up to 32 relays with potential-free change-over contact and up to 96 signal relays.
The intended sites are all areas being directly connected to the public low voltage supply, e.g. residential, commercial and industrial ranges as well as small enterprises (according to EN 5502). The controller unit may only be used in ambient conditions as specified in the technical data.
The controller unit must not be used in potentially explosive atmospheres.
Comfortable and easy operation of the controller unit is done via the logical menu structure. A number of integrated parameters enables the realisation of various requirements in the gas measuring technique. Configuration is menu-driven via the keypad. For fast and easy configuration, you can use the PC based configuration software, included in the PC tool.
Prior to commissioning please consider the guidelines for wiring and commissioning of the hardware.
2.1 Normal Mode
2.2 Alarm Mode
2.3 Special Status Mode
In normal mode, the gas concentrations of the active sensors are continuously polled and displayed at the LC display in a scrolling way. In addition, the controller unit continuously monitors itself, its outputs and the communication to all active sensors and modules.
If the gas concentration reaches or exceeds the programmed alarm threshold, the alarm is started, the assigned alarm relay is activated and the alarm LED (light red for alarm 1, dark red for alarm 2 + n) starts to flash. The set alarm can be read from the menu Alarm Status.
When the gas concentration falls below the alarm threshold and the set hysteresis, the alarm is automatically reset. In latching mode, the alarm must be reset manually directly at the alarm triggering device after falling below the threshold.
In the special status mode there are delayed measurements for the operation side, but no alarm evaluation. The special status is indicated on the display and it always activates the fault relay.
The controller unit adopts the special status when:
- faults of one or more active devices occur,
- the operation starts up after return of voltage (power on),
- the service mode is activated by the user,
- the user reads or changes parameters,
- an alarm or signal relay is manually overridden in the alarm status menu or via digital inputs.
This function is obligatory for flammable gases detected by catalytic bead sensors generating a falling signal at too high gas concentrations.
4 | BC272555441546en-000201
© Danfoss | CLimate Solutions | 2022.03
User Guide | Danfoss Gas Detection - Controller unit and Expansion module
2.3.1 Fault Mode
2.3.2 Restart Mode (Warm-up Operation)
2.3.3 Service Mode
If the controller unit detects an incorrect communication of an active sensor or module, or if an analog signal is outside the admissible range (< 3.0 mA > 21.2 mA), or if there are internal function errors coming from the self-control modules incl. watchdog and voltage control, the assigned fault relay is set and the error LED starts to flash.
Gas detection sensors need a running-in period, until the chemical process of the sensor reaches stable conditions. During this running-in period the sensor signal can lead to an unwanted release of a pseudo alarm.
Depending on the connected sensor types, the longest warm-up time must be entered as power­on time in the controller.
This power-on time is started at the controller unit after switching on the power supply and/or after the return of voltage.
This operation mode includes commissioning, calibration, testing, repair and decommissioning.
The service mode can be enabled for a single sensor, for a group of sensors as well as for the complete system. In active service mode pending alarms for the concerned devices are held, but new alarms are suppressed.
The error is displayed in the menu Error Status in clear text. After removal of the cause, the error message must be acknowledged manually in the menu Error Status.
While this time is running out, the gas controller unit does not display any values and does not activate any alarms; the controller system is not yet ready for use.
The power-on status occurs on the first line of the starting menu.
2.3.4 UPS Functionality
The supply voltage is monitored in all modes. When reaching the battery voltage in the power pack, the UPS function of the controller unit is enabled and the connected battery is charged.
If the power fails, the battery voltage drops down and generates the power failure message.
At empty battery voltage, the battery is separated from the circuit (function of deep discharge protection).
When the power is restored, there will be an automatic return to the charging mode.
No settings and therefore no parameters are required for the UPS functionality.
© Danfoss | CLimate Solutions | 2022.03
BC272555441546en-000201 | 5
Rela y
Service
24
AP 05 AP 06 AP 07 AP 08
Rela y
Rela y
Rela y
148H138_01-2018
Rela y
24
AP 01 AP 02 AP 03 AP 04
Rela y
Rela y
Rela y
148H144_02-2018
Rela y
3 Wiring configuration
Fault
AR 01
AR 02
AR 03
AR 04
VDC
0 VDC
Power/
X10
Main Bus
1
tool
X_Bus
+-
2
3152
X_Bus
0 VDC
Main Bus_A
3
Main Bus_A
A
X2X1 X2
Relay
Main Bus_B
4
< 24 VDC
1 2 3 4
X11
Main Bus_B
X2X1 X2
28
511
39
7
612
13410
14
15
D1 D2 D3 D4
D RF
Digital output
Controller unit
Power Analog
24 VDC
0 VDC
<
24 VDC
0 VDC
0 VDC
Field Bus_A
Field Bus
Field Bus_A
1
X12
Field Bus_B
B
AR 05
28
511
39
612
AR 06
7
Field Bus_B
2
Analog
input
AI_01
AI_02
46
3
24 VDC
4-20 mA
AR 07
output
AI_03
AI_04
578910 11 12
24 VDC
4-20 mA
AR 08
13410
14
15
AO_01
4-20 mA
AO_02
24 VDC
DI_01
4-20 mA
Digital
input
DI_02
24 VDC
DI_03
Danfoss
DI_04
VDC
0 VDC
Power/
X10
D1 D2 D3 D4
Digital output
Danfoss
Expansion Module
Main Bus
+
-
Field Bus_A
4
3
1
2
Field Bus_A
Field Bus_B
B
Field Bus_B
X11
Field Bus
Power
24 VDC
0 VDC
< 24 VDC
1 2 3 4
<
24 VDC
0 VDC
0 VDC
C
560 R
Field Bus_A
Field Bus_B
X12
Analog
input
AI_01
AI_02
1
2
46
3
24 VDC
4-20 mA
Analog output
AI_03
AI_04
AO_03
AO_04
578910 11 12
24 VDC
24 VDC
4-20 mA
24 VDC
4-20 mA
4-20 mA
6 | BC272555441546en-000201
© Danfoss | CLimate Solutions | 2022.03
User Guide | Danfoss Gas Detection - Controller unit and Expansion module
4 Operation
4.1 Function of the keys and LEDs on the keypad
The complete configuration and service are made via keypad user interface in combination with the LC display screen. Security is provided via three password levels against unauthorized intervention.
Exits programming, returns to the previous menu level.
Enters sub menus, and saves parameter settings.
Scrolls up & down within a menu, changes a value.
Moves the cursor position.
LED light red: Flashes when alarm one or more alarms are active. LED dark red: Flashes when alarm two and alarms of higher priority are active. LED yellow: Flashes at system or sensor failure or when maintenance date exceeded or in voltage-free status with the option power failure flashing light. LED green: Power LED
4.2 Setting / changing of parameters and set points
Open desired menu window. Code input field opens automatically, if no code is approved.
After input of valid code the cursor jumps onto the first position segment to be changed.
Push the cursor onto the position segment, which has to be changed.
Set the desired parameter / set point with the keys.
Save the changed value, confirm storage (ENTER).
Cancel storage / close editing / go back to next higher menu level (ESCAPE function).
© Danfoss | CLimate Solutions | 2022.03
BC272555441546en-000201 | 7
4.3 Code Levels
According to the regulations of national and international standards for gas warning systems, all inputs and changes are protected by a four-digit numeric code (= password) against unauthorised intervention. The menu windows of status messages and measuring values are visible without entering a code.
The release of a code level is cancelled if no button is pushed within 15 minutes.
The code levels are classified in order of priority: Priority 1 has top priority.
Priority 1: (code 5468, not changeable)
Code level priority 1 is intended for the service technician of the installer to change parameters and set-points. This password allows working on all settings. For opening the parameter menus you must first activate the service mode after code release.
Priority 2: (code 4009, not changeable)
With code level 2, it is possible to lock / unlock transmitters temporarily. This password is only given to the end user by the installer in problem situations. In order to lock / unlock the sensors you must first activate the service mode after code release.
Priority 3: (code 4321, is settable in the maintenance information menu)
It is only intended to update the maintenance date. Normally the code is only known by the service technician who has last changed it since it can be changed individually via priority 1.
Priority 4: (password 1234) (code not changeable)
Code level priority 4 allows the operator:
- to acknowledge faults,
- to set date and time,
- to configure and to operate the data logger option, after activation of the operation mode “Service Mode”:
- to read all parameters,
- to manually operate test function of the alarm relays (functional test of the connected units),
- to manually operate test function of the analog outputs (functional test of the connected units).
8 | BC272555441546en-000201
© Danfoss | CLimate Solutions | 2022.03
User Guide | Danfoss Gas Detection - Controller unit and Expansion module
5 Menu Overview
Menu operation is done via a clear, intuitive and logical menu structure. The operating menu contains the following levels:
• Starting menu with indication of the device type if no MP is registered, otherwise scrolling display of the gas concentrations of all registered sensors in 5-second intervals. If alarms are active, only the values of the sensors currently in alarm status are displayed.
• Main menu
• Submenu 1 to 3
Power On Time 19s
Starting menu
After 30 sec.
Danfoss
19.04.18 10.55
Main menu Submenu 1
System Errors
Status Alarms
Display of
or
gas concentration
Reading and reset of errors See from point 5.1
Display of the status of actual alarms See point 5.2
Alarm Relays Status
Signal Relays Status
Measuring Values
Maintenance Information
Data Logger
Display of the alarm relays status Manual operation of the relays See from 5.3
Display of the signal relays status Manual operation of the relays See from 5.3
Display of measuring values See from 5.4
Information about the connected devices See from 5.5
Reading and change of the data logger parameters See from 4.6
© Danfoss | CLimate Solutions | 2022.03
Display Parameters
Parameters
General display parameters without safety relations See from 5.6
Reading and change of the relay, measuring point and system parameters (security­relevant) See from 5.7
BC272555441546en-000201 | 9
5.1 Fault Management
5.1.1 Acknowledge a Fault
5.1.2 Error Memory
The integrated fault management records the first 100 faults with date and time stamps in the menu „System Errors“. Additionally a record of the faults occurs in the “Error memory”, which can only be read and reset by the service technician.
A pending fault activates the fault indication relay. The yellow LED (Fault) starts to flash; the fault is displayed in plain text with date and time in the starting menu.
According to the directives of the gas measuring technique, accumulated errors are allowed to be acknowledged automatically. The automatic acknowledgment of a fault is only possible after having removed the cause!
The menu „Error Memory“ in the main menu “System Error” can only be opened via the code level priority 1.
In the error memory, the first 100 faults that have occurred and have already been acknowledged in the menu “System Error” are listed for the service technician in a power failure safe way.
Error Memory
Select menu “Error Memory”
In case of the fault of a connected sensor the alarms defined in the menu “MP Parameter” are activated in addition.
Attention:
This memory should always be read during maintenance, relevant faults should be tracked and entered in the service logbook, and finally the memory should be emptied.
DP1 Error
05.02 10:38
DP1 Error Reset?
DP1 Error cancelled
Fault acknowledged
Example: Communication error DP01 Error
Acknowledge the fault message?
Fault message acknowledged
10 | BC272555441546en-000201
© Danfoss | CLimate Solutions | 2022.03
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