Dräger Regard 3900, Regard 3910, Regard 3920 Instructions For Use Manual
Regard 3900 Series
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Sixteen Channel Controller
Instructions for Use
WARNING
Strictly follow the Instructions for Use. The user must fully
understand and strictly observe the instructions. Use the
!
product only for the purposes specied in the Intended
Use section of this document.
Dräger. Technology for Life
®
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Contents
Contents
1 For your safety ................................................................................................................................................................4
1.1 General safety statements ................................................................................................................................................4
1.2 Definitions of alert icons ....................................................................................................................................................4
2 Description ......................................................................................................................................................................5
2.1 Product overview ..............................................................................................................................................................5
2.2 Intended use .....................................................................................................................................................................5
2.3 Limitations on use .............................................................................................................................................................5
2.4 Approvals ..........................................................................................................................................................................5
3 User information .............................................................................................................................................................7
3.1 Display screen ..................................................................................................................................................................7
3.2 Alarm, fault and active LEDs .............................................................................................................................................8
3.3 Power and inhibit LEDs .....................................................................................................................................................8
3.4 Internal sounder ................................................................................................................................................................8
3.5 External warning devices ..................................................................................................................................................9
3.6 Control buttons (and remote reset) ...................................................................................................................................9
3.7 LED and display screen test .............................................................................................................................................9
4 Technical information ...................................................................................................................................................10
4.1 General ...........................................................................................................................................................................10
4.2 Display board ..................................................................................................................................................................10
4.3 Input module ...................................................................................................................................................................11
4.4 Relay module ..................................................................................................................................................................11
4.5 Output module ................................................................................................................................................................12
5 Installation and set up ..................................................................................................................................................13
5.1 General instructions ........................................................................................................................................................13
5.2 Positioning and mounting the controller ..........................................................................................................................13
5.3 Cable entries ...................................................................................................................................................................14
5.4 Cable screen earthing plate ............................................................................................................................................14
5.5 Power supplies ................................................................................................................................................................15
5.6 Installing control modules ...............................................................................................................................................16
5.7 Connecting remote sensor transmitters ..........................................................................................................................20
5.8 Connecting other remote devices ...................................................................................................................................23
6 Conguringandcalibratingthecontroller .................................................................................................................25
7 Troubleshooting
7.1 Polytron remote sensor transmitter faults .......................................................................................................................27
8 Maintenance ..................................................................................................................................................................27
9 Disposal of electrical and electronic equipment .......................................................................................................27
10 Technical data ...............................................................................................................................................................28
10.1 Transfer function .............................................................................................................................................................29
11 Order list ........................................................................................................................................................................30
............................................................................................................................................................26
Annexe
A ConguringandcalibratingaRegard3920controller ..............................................................................................31
A.1 General ...........................................................................................................................................................................31
A.2 Main menu ......................................................................................................................................................................31
A.3 Information menu ............................................................................................................................................................32
A.4 Calibration menu .............................................................................................................................................................33
A.5 Settings menu .................................................................................................................................................................34
3Regard 3900 Series
For your safety
1 For your safety
1.1 General safety statements
● Before using this product, carefully read the Instructions for Use.
● Do not dispose of the Instructions for Use. Ensure that they are retained and appropriately used by the product user.
● Only fully trained and competent users are permitted to use this product.
● Comply with all local and national rules and regulations associated with this product.
● Only trained and competent personnel are permitted to inspect, repair and service the product as detailed in these Instructions
for Use (see Section 8 on Page 27). Further maintenance work that is not detailed in these Instructions for Use must only be
carried out by Dräger or personnel qualied by Dräger. Dräger recommends a Dräger service contract for all maintenance
activities.
● Properly trained service personnel must inspect and service this product as detailed in the maintenance section of this
document.
● Use only genuine Dräger spare parts and accessories, or the proper functioning of the product may be impaired.
● Do not use a faulty or incomplete product, and do not modify the product.
● Notify Dräger in the event of any component fault or failure.
1.2 Denitionsofalerticons
Alert icons are used in this document to provide and highlight text that requires a greater awareness by the user. A denition of
the meaning of each icon is as follows:
WARNING
!
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
!
Indicates a potentially hazardous situation which, if not avoided, could result in physical injury or damage to the product
or environment. It may also be used to alert against unsafe practices.
NOTICE
Indicates additional information on how to use the product.
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Regard 3900 Series
Description
2 Description
2.1 Product overview
The Dräger Regard 3900 series is a range of controllers that are used to continuously monitor up to sixteen 4–20 mA remote
sensor transmitters in order to warn of potentially dangerous or harmful conditions.
The series includes the Regard 3900, 3910 and 3920. The Regard 3900 and 3920 are sealed control panels, and the Regard
3910 is a modular system intended to be installed in a rack-based system. Other differences are explained in this document
where necessary.
The controller monitors the current signals from the remote sensor transmitters on input channels and provides warnings when
alarm or fault conditions occur. Each of the input channels can provide alarms for up to three gas levels (A1, A2 and A3) and two
fault conditions (F1 and F2). The gas-level alarms are congured to provide an indication of potentially dangerous or harmful gas
levels at the transmitter, and can be set to activate as the monitored gas levels are rising or falling. The faults (F1 and F2) operate
when the transmitter sends the relevant fault signal (F2 is only used when the transmitter provides a second fault signal).
The combination of internal control modules (input modules, relay modules and output modules) and the controller conguration
settings can be altered to meet the gas detection and warning requirements. Additionally the warning devices used with the
controller can be selected and congured as required by the user. The Regard 3900 series controllers are congured using a
Microsoft Windows
2.2 Intended use
Regard 3900 series controllers are used with 4–20 mA transmitters to provide stationary, continuous monitoring of ammable
or toxic gases and vapours, and oxygen deciency or enrichment. The controller is primarily intended for use as a part of a gas
detection system, but can be used with any remote sensor transmitter which uses a 4–20 mA source output (transmitters that
use a 4–20 mA sink output cannot be used). This document describes the Regard 3900 series used as a controller for a gas
detection system.
®
based software program. The Regard 3920 also has a built-in conguration system.
The controller is intended for use in residential, commercial and industrial environments to provide:
● Display of measured gas level.
● Visual and audible alarms at the controller and external warning devices.
2.3 Limitations on use
WARNING
The controller is not designed or approved for use in areas where combustible or explosive gases, vapours or dust mixtures
!
are likely to occur. Do not use the Regard 3900 series controller in areas subject to explosion hazards (“hazardous
areas”) without suitable protection. Contact Dräger for further information.
The controller cannot be used with three-wire transmitters that have a 4–20 mA sink output.
2.4 Approvals
The Regard 3900 series controller is certied according to the directive 94/9/EC (ATEX directive) to be operated with performance
approved 4–20 mA transmitters (EC-type examination certicate TRL 06 ATEX 21099X).
Output modules are not included in the scope of the Regard 3900 ATEX EC-type examination. Output modules shall not be used
for countermeasures against risk of explosion.
SpecialconditionsforsafeuseaccordingtoEC-typeexaminationcerticateTRL06ATEX21099X
1. Only remote sensor transmitters with valid and appropriate ATEX certication for safety and measurement performance shall
be connected to this control equipment. These connections may be via ATEX certied safety interface barriers.
2. Any cable used for interconnection of remote sensor transmitters should be selected to ensure that its resistance does not
have any adverse effects on the operation of the control unit.
Requirements of EN 60079-29-1
If a Regard 3900 series controller is used for ammable gas detection to protect against risk of explosion, at least one gas alarm
relay should be set latching. (See EN 60079-29-1:2007 Explosive atmospheres – Gas detectors – Performance requirements of
detectors for ammable gases.)
CEMarkingandATEXapproval
The Regard 3900 is CE marked to indicate conformity to the following directives:
● ATEX directive 94/9/EC
● EMC directive 2004/108/EC
● Low-voltage directive 2006/95/EC
5Regard 3900 Series
Description
NOTICE
Using a power supply unit (PSU) not supplied or installed by Dräger may require reassessment of the compliance of the
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controller with the EMC directive and/or the low-voltage directive.
ATEXMarking
The controller also has the following ATEX marking:
II (2) G
WARNING
This marking does not mean that the unit is “explosion proof”. The Regard 3900 series cannot be used in areas subject
!
to explosion hazards (“hazardous areas”) without suitable protection.
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Regard 3900 Series
3 User information
Regard 3920
User information
Regard 3900
Regard 3910
3825
3.1 Display screen
The display screen is a multi-line, 20-character, backlit, LCD screen that provides information about the gases that the controller
is monitoring. During the normal gas-level display, the screen shows four lines of text.
Channel
identity
▼
0 1 : 0 % L E L M e t h a n
0 2 : 0 . 0 1 p p m C h l o r i
0 3 : 0 . 1 p p m H 2 S
0 4 : 1 2 3 4 p p b G a s n a m
● Very low gas levels of ± 2% of the measuring range are displayed as zero (this is referred to as the zero clamp).
● The display screen contrast is adjustable. Contact a trained maintenance technician or Dräger if adjustment is required.
3.1.1 Display screen scrolling
The display screen shows the information from up to four channels at a time, and if there are more than four channels installed,
the display screen scrolls to show all channels sequentially.
● Press Hold / II / ▲ for <1 second to freeze the display screen (stop scrolling).
● Press Hold / II / ▲ again for <1 second to unfreeze the display screen (restart scrolling).
Gas level Measurement
▼
units
▼ ▼
Gas name
or measuring range
3.1.2 Gas name or measuring range
The display screen can toggle between the gas name and the measuring range. The default is the gas name.
● Press Hold / II / ▲ for >1 second to show the full-scale deection (FSD) (the example below shows measuring range of 0–2000).
0 2 : 1 2 3 5 p p m ( 2 0 0 0 )
3.1.3 Over-range
Over-range is displayed if the gas level increases above the measuring range (the transmitter signal is above 20 mA). The overrange indication is latching (i.e. it remains on-screen even if the gas level returns into the measuring range).
● Press Acknowledge / OK (or operate the remote reset if available) to clear an over-range indication. If it is pressed when the
gas level is above the measuring range, the indication clears when gas level falls into the measuring range.
0 2 : O v e r - r a n g e
7Regard 3900 Series
User information
3.1.4 Under-range
Under-range is displayed when the gas level is below the measuring range (the transmitter signal is below 3.8 mA – but not a
recognized maintenance or fault signal).
0 2 : U n d e r - r a n g e
3.1.5 Maintenance
Maintenance is displayed when transmitter maintenance is due (the transmitter signal is a recognized maintenance signal).
0 2 : M a i n t e n a n c e
3.2 Alarm, fault and active LEDs
WARNING
The alarm levels and the activation modes are congured to meet the requirements of the user. The actions and
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countermeasures to be taken when any alarm or fault LED activates must be dened by the person responsible for the
gas detection system.
Although there are up to three gas-level alarms (A1 to A3) and two fault alarms (F1 and F2), there are no LEDs on the controller
for alarm A3 or fault F2. Remote warning devices can be congured to provide indications for alarm A3 and fault F2 when
required.
LED Condition
Alarm A1 Flashing
Alarm A2 Flashing
Fault F1 Flashing
Active /
Steady
Off
Steady
Off
Steady
Off
Steady
Blinking (off every 30 sec)
Off
A1 alarm tripped
A1 alarm acknowledged but alarm condition present
No alarm condition
A2 alarm tripped
A2 alarm acknowledged but alarm condition present
No alarm condition
F1 alarm tripped
F1 alarm acknowledged but fault present
Channel healthy
Channel active
Alarms inhibited
Channel inactive
(see also Inhibit / LED in Section 3.3)
3.3 PowerandinhibitLEDs
The power supply to the controller can be from an AC or DC power source or both. When both are used, the DC power source
(usually a battery system) is used as a backup supply in case of AC power supply failure.
Power AC /
It is optional to connect this LED when the controller uses both AC and DC power sources. When the LED is connected, it is
illuminated when the controller is supplied from the (primary) AC supply, and is off when the controller is supplied from the
(backup) DC supply.
Power DC /
Illuminates when there is a 24 Vdc supply to the internal control modules. (Irrespective of the power supply to the controller, the
internal control modules require a 24 Vdc supply.)
Inhibit/ LED
Illuminates to indicate that the alarms are inhibited, and therefore the normal gas-level monitoring and warning functions of
the controller are inactive. When the LED is illuminated, the Active /
30 seconds. Any remote warning device congured to activate when the alarms are inhibited would also activate.
LED
LED
LEDs blink off and the internal sounder beeps every
The alarms are inhibited when an internal inhibit switch is set to the maintenance position: usually for maintenance or repair of
the controller.
3.4 Internal sounder
The internal sounder emits an audible warning tone when A1, A2, A3, or F1 activates (not when F2 activates). The sounder also
beeps every 30 seconds when alarms are inhibited.
● Press Acknowledge / OK (or operate the remote reset if available) to silence the sounder.
8
Regard 3900 Series
User information
3.5 External warning devices
External warning devices used with the Regard 3900 series controllers are activated by relays inside the controller, and are
congured to meet the user’s gas detection requirements. The relays can be congured to operate in a number of ways:
● Latching relays remain activated (in the alarm state) when an alarm condition has occurred but is no longer present.
● Non-latching relays deactivate (return to the non-alarm state) when an alarm condition is no longer present.
● Acknowledgeable relays can be manually deactivated (returned to the non-alarm state) when the alarm condition is still
present. This is used to switch off or silence external warning devices when the alarm condition is still present.
● Non-acknowledgeable cannot be deactivated when the alarm condition is present.
● Alarms inhibited relays activate when an internal inhibit switch is set to the maintenance position (see Inhibit / LED in
Section 3.3 on Page 4).
Latching or non-latching
Setting Meaning
Latching The relay requires manual action to reset after alarm activation.
Non-latching The relay automatically returns to the non-alarm state when the
Acknowledgeableornon-acknowledgeable
Press Acknowledge / OK or operate the remote reset:
• If the alarm condition is clear or if the relay is acknowledgeable,
the relay returns to the non-alarm state immediately.
• If the alarm condition is present, the relay returns to the non-
alarm state when the alarm condition clears.
alarm condition clears.
Setting Meaning
Acknowledgeable The relay can be reset manually when the alarm condition is
Non-acknowledgeable Relay cannot be reset manually. The relay automatically returns to
present.
Press Acknowledge / OK or operate the remote reset – the relay
returns to the non-alarm state.
the non-alarm state when the alarm condition clears.
3.6 Controlbuttons(andremotereset)
Acknowledge / OK
Acknowledges activated alarms, faults and display screen messages. When pressed, depending on the associated transmitter
signal and the controller settings:
● Alarm and fault LEDs on the controller extinguish or change to steady.
● The internal sounder is silenced.
● Display screen messages clear (for example: over-range).
● External warning devices remain activated or deactivate depending on the conguration.
Remote reset
A remote reset is a switch that performs the same functions as the Acknowledge / OK button, remotely from the controller.
Hold/II/▲
Controls the scrolling function and toggles between the gas name and the measuring range on the display screen.
● Press Hold / II / ▲ for <1 second to freeze and unfreeze scrolling (when more than four channels are used).
● Press Hold / II / ▲ for >1 second to toggle between the gas name and the measuring range.
Regard 3920 only
The ▲ / ▼ / OK buttons on Regard 3920 are also used to navigate and select settings within the built-in conguration menus
(see Annexe A on Page 30).
3.7 LED and display screen test
Pressing and holding two control buttons simultaneously tests the LEDs, display screen and internal sounder of the controller.
While the buttons are held, all LEDs illuminate (the Power AC /
segments ll and the sounder emits the alarm tone.
● Regard 3900: press Acknowledge and Hold
● Regard 3910: press OK and II
● Regard 3920: press OK and ▲
Use this function as a condence check of controller visual and audible outputs when required.
LED only illuminates if connected), all display screen
9Regard 3900 Series
Technical information
4 Technical information
WARNING
!
This section and all subsequent sections contain technical and set-up information for trained maintenance technicians.
The procedures should not be attempted by untrained personnel as it could make the controller or gas detection system
unsafe for use.
4.1 General
The controller has a display board and up to six control modules. The control modules are a combination of input modules,
relay modules and output modules, which is exible within the limitations of the controller. Internally, all control modules and the
display board are connected together using a ribbon cable.
The controller can be supplied from an AC or DC source or both, and irrespective of the power supply to the controller the internal
control modules receive a 24 Vdc supply. The following internal LEDs operate during use:
● A green LED on each of the control modules illuminates to indicate that the internal DC voltage is supplied.
● Two red LEDs on the right-hand side of the display board and each of the control modules icker during normal operation.
● A red LED next to each relay on an input module or relay module illuminates when the relay is energized.
4.2 Displayboard
The display board is tted inside the controller, and houses the display screen and the LEDs that are visible on the front panel.
The display screen and LEDs provide information and warnings in response to the conditions measured at the remote sensor
transmitters. Also on the display board are the inhibit switch and the contrast control.
4.2.1 Inhibitswitch
The inhibit switch is used during maintenance or repair of the controller to hold the controller relays in their current state, and
thereby prevent activation of the gas-level warnings. The inhibit switch operates as follows:
Position Effect
0 All relays operate normally
1 Relays congured as “alarms inhibited” energize (associated remote warning devices activate).
!
4.2.2 Contrast control
The display screen contrast can be adjusted using the contrast
control. When required, use a suitable screwdriver to turn
the control to adjust the contrast. Note that LCD screens are
affected by temperature and adjustment may be required to
suit very cold or very hot environments.
All other relays are held in their current state.
The Inhibit /
The Active / LEDs blink off and the internal sounder beeps every 30 seconds.
Output module signals freeze at their current level.
WARNING
Setting the inhibit switch to position 1 holds the controller relays in their current state and prevents activation of gas-level
warnings. Always return the switch to position 0 after the maintenance or repair task.
LED illuminates.
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3801
Regard 3900 Series
Technical information
4.3 Input module
An input module has four channels that can each monitor the current signal from a remote sensor transmitter. Each of the
channels can provide alarms for up to three gas levels (A1, A2 and A3) and two fault conditions (F1 and F2). The gas-level
alarms are congured to provide an indication of potentially dangerous or harmful gas levels at the transmitter, and can be set to
activate as the monitored gas levels are rising or falling. The faults (F1 and F2) operate when the transmitter sends the relevant
fault signal (F2 is only used when the transmitter provides a second fault signal).
Each input module has three relays that operate when an F1 (fault 1), A1 (alarm 1) and A2 (alarm 2) signal is received from any of
the channels monitored by the board. The relays are volt-free single-pole changeover type that can be used to activate external
warning devices. The fuse on the input module protects the module against a short circuit on the input channels (Ch1 to Ch4).
3802
3803
The input module terminals are:
● Ch1 to Ch4 are channels for two-wire or three-wire 4–20 mA remote sensor transmitters.
● A1, A2 and Fault (F1) are terminals for the input module relays.
● RR are the remote reset terminals that are used to connect a normally-open switch, remote from the controller, to perform the
same function as the Acknowledge / OK button.
During installation, each input module is congured with a different module number (1–4) in order to set the channel numbers
(1–16) within the controller system (see Section 5.6.2 on Page 17).
Each input module requires a 24 Vdc supply using cables that are supplied with the module (see Section 5.6.3 on Page 18).
4.3.1 Input module relay settings
Input module relays settings are preset or can be set during conguration as follows:
● All input module relays are non-acknowledgeable.
● A1 and A2 relays energize on alarm.
● F1 relay is always (preset) normally energized.
● Each relay can be set latching or non-latching during conguration.
4.4 Relay module
A relay module is used to activate external warning devices
(alarms, ventilators or other safety equipment) when alarm or
fault conditions are sensed at the Regard 3900 series controller.
The module has eight volt-free single-pole changeover relays
of which one is a non-congurable system-fault relay (RL1)
and seven are congurable relays (RL2 to RL8).
RL1 to RL8 are the terminals for the relay module relays.
During installation, each relay module is congured with
a different module number (1 or 2) in order to set the relay
numbers (1–16) within the controller system (see Section 5.6.2
on Page 17).
3804
11Regard 3900 Series
Technical information
4.4.1 Relay module relay settings
RL1 is used to indicate that a system-fault has occurred. For example: RL1 will de-energize if the ribbon cable is disconnected
from the relay module, or if an F1 fault signal is received from any remote sensor transmitter in the system. RL1 is preset to:
● Function: common F1
● Normally energized
● Latching
● Non-acknowledgeable
The other seven relays can be set during conguration to:
● Function: see table below
● Normally energized or energize on alarm
● Latching or non-latching
● Acknowledgeable or non-acknowledgeable
Function Relay changes state when
Common A1 A1 trips on any channel
Common A2 A2 trips on any channel
Common A3 A3 trips on any channel
Common F1 F1 trips on any channel
Common F2 F2 trips on any channel
Common A1, A2 or A3 A1 or A2 or A3 trips on any channel
Single A1 A1 trips on one specied channel
Single A2 A2 trips on one specied channel
Single A3 A3 trips on one specied channel
Single F1 F1 trips on one specied channel
Single F2 F2 trips on one specied channel
Voting A1 A1 trips on a specied number of channels in a group
Voting A2 A2 trips on a specied number of channels in a group
Voting A3 A3 trips on a specied number of channels in a group
Voting F1 F1 trips on a specied number of channels in a group
Voting F2 F2 trips on a specied number of channels in a group
Alarms inhibited
The inhibit switch on the display board is moved to position 1
No function Relay does not change state
4.5 Output module
An output module is used to send the current signals that are
received from the remote sensor transmitters to an external
monitoring device or system. The module has eight output
channels (Ch 1–8) that match the signals from the controller
input channels (either Ch 1–8 or Ch 9–16) (see Section 5.6.2
on Page 17).
+ Signal
- 0 V
The signal outputs and 0 V duplicate the input channel signals but are electrically isolated from the input channels. The signal
outputs are current source that will only work when connected to a passive load.
Input channel signal (mA) Display screen reading (0–100 range) Output channel signal (mA)
Below 3.8 Under-range or maintenance Matches input signal
1
3.8 to 4.2 0 4.0 (zero clamp
)
4.3 2 4.3
12 50 12
20 100 20
Above 20 Over-range Matches input signal
Input channel inactive Not applicable 0
Note 1: The zero clamp provides a 4 mA output signal for very low gas levels of ± 2% of the measuring range.
Alarmsinhibit
If the inhibit switch is set to position 1 the output signals freeze at their current level. When the inhibit switch is returned position 0
the output signals return to the normal level.
3805
Output module fault
If the output module has a fault, the output signal on all channels is 1 mA (± 0.3 mA).
12
Regard 3900 Series
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