Dräger REGARD User manual

8-INPUT 4-20 MODULE
8-CHANNEL DISPLAY CARD
(ATEX VERSION)
REGARD
GAS DETECTION SYSTEM
INSTRUCTIONS FOR USE
B
A
0 V
24V
24V
0 V
24V
CH1
0 V
24V
CH2
0 V
24V
CH3
0 V
24V
CH4
0 V
24V
CH5
0 V
24V
CH6
0 V
24V
CH7
0 V
24V
CH8
0 V
8-CHANNEL DISPLAY
A2
A1
Power
Inhibit
R
SHIFT
h1 : 0
Fault
A3

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
2

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
3
CONTENTS
FOR YOUR SAFETY 5
OPERATION 6
Intended use 6
Description 6
General 6
Power-on sequence 6
Command mode 7
Master card 7
Modbus gateway card 7
Electromagnetic compatibility (EMC) 7
Display card front panel controls and indicators 8
Display 8
LEDs 8
Push buttons 8
Input module terminals 9
Operational faults 10
Operational fault codes 10
INSTALLATION 12
Install input module 12
Connect RS-485 output to display card 12
Connect transmitters to input module 13
Connect DC supply to module 15
Install 8-channel display card 15
Optional connections 16
A1, A2, Fault alarm relays 16
Remote reset 16
CONFIGURATION 17
Command mode 17
Function of front panel controls in command mode 17
Accessing command mode 18
Entering a password 18
Changing a password 18
Save configuration settings 19
Locking card in command mode 19
Quit command mode 19
Table of commands 19
Basic configuration 21
Set number of heads connected to module 21
Set gas name 21
Set gas units 22
Set measurement range (FSD) 23
Set alarm trip levels 24
Set rising or falling alarms 24
Set alarm latch mode 25
Set zero 26
Set span 26
Advanced configuration 27
Set Regard channel numbers 27
Set Regard communications checksum 27
Set over-range latch 28

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
4
Set relay energise state 28
Set zero drift band 29
Set under-range fault level 29
Set over-range fault level 30
Set alarm hysteresis 30
Set user-definable text 31
Gas level display on / off 31
Set LEDs to display master alarms or per head alarms 32
Display head number or channel number 32
MAINTENANCE 33
Recommended maintenance intervals 33
Commands for system maintenance 33
Test LEDs and display 33
Test remote reset 33
Test alarm relays 34
Test communications with 8-input module 34
Disable alarm relays 34
TECHNICAL DATA 35
CE marking and ATEX marking 37
Special conditions for safe use 37

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
5
FOR YOUR SAFETY
Follow the instructions
Follow the instructions for installation, operation and maintenance.
Use in areas subject to explosion hazards
The 8-input 4-20 module and 8-channel display card are not designed for use in a
flammable atmosphere without suitable protection.
Liability for proper function or damage
Liability for proper function of this apparatus is irrevocably transferred to the owner or
operator to the extent that the apparatus has been commissioned, serviced or repaired
by personnel not employed or authorised by Draeger Service, or when this apparatus
was used in a manner not conforming to its intended use.
Draeger Limited can not be held responsible for any damage caused by non-compliance
with the above recommendations. The warranty and liability provisions of the terms and
conditions of sale and delivery of Draeger Limited are likewise not modified by
recommendations given above.
Maintenance
This apparatus must be inspected and serviced by experts at regular intervals and a
record maintained of such inspections and servicing. Repairs and general overhaul of this
apparatus should only be carried out by competent personnel.
We recommend that either a training course or service contract is obtained from
DraegerService and that all repairs are carried out by them.

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
6
OPERATION
Intended use
The REGARD 8-channel display card and 8-input 4-20 module provide:
•Measurement and display of gas level with gas measuring heads (transmitters) such
as Polytron 2. The equipment can be used with any 4-20mA transmitter.
•Activation of alarms when pre-set gas levels are exceeded.
The input module and display card are intended for permanent installation in a non-
hazardous environment, such as a control room or marshalling cabinet.
Description
GeneralThe 8-input 4-20 module takes signals from up to eight 2-wire or 3-wire 4-20mA
measuring heads (transmitters). The module provides terminals for field cables and DC
power to the transmitters. Signals from the eight inputs are multiplexed onto an RS-485
connection for transmission to the 8-channel display card. The display card displays the
gas level of each head and indicates alarm and fault conditions.
The display card has three alarm relays for
•A1 gas alarm
•A2 gas alarm
•Fault alarm
Each 8-input module requires an 8-channel display card. Only one module can be
connected to a display card.
The input module and display card can be located in separate enclosures or buildings.
The maximum distance of the RS-485 cable between the module and display card is
1km.
Power-on sequence
When power is applied to the display card, it is immediately inhibited and put into its
default state, all relays are de-energised. After about two seconds, when the
configuration settings have been read from the non-volatile memory, these settings are
applied. So if the A1 and A2 relays are set normally energised, they will change state.
The display card remains inhibited for a user definable period (default is the minimum of
30 seconds) allowing time for heads connected to the input module to settle. During this
period no data from the input module is processed by the display card. Once this power-
on inhibit period has elapsed data begins to be read from the module and the display
card enters its normal operating state.

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
7
Command mode
Introduction
All card settings, such as measurement range, zero, span, alarm levels, gas name and
alarm operation, are set using the commands available in command mode.
There are three levels of access in command mode, two of which require the entry of a
password:
•Read level, in which configuration settings can be read but not altered, and basic
testing done (no password needed);
•Maintenance level, which allows access to commands used during regular calibration
and maintenance (requires maintenance password);
•Configuration level, which allows access to all commands used to set up the card
(requires configuration password).
Refer to the Configuration section for a detailed description of Command mode and the
commands available.
Alarm inhibit
When a card is put into command mode gas alarms (A1 and A2) are inhibited: the relays
will remain in their current state and will not change state unless changed manually. Any
relay already in its alarm state when the card enters command mode will remain in that
state. The Inhibit LED lights and the Fault relay trips to indicate that alarms are inhibited.
You can manually change the state of the alarm relays while in command mode using
commands 14–4 (A1 relay), 14–5 (A2 relay) and 14–6 (Fault relay).
Locking cards in command mode
Cards exit command mode automatically if no buttons are pressed for 10 minutes. To
lock a card in command mode use command 60–0. Note that this command is not
available in read mode.
Master card
The Regard Master card provides common and/or voted alarm outputs and advanced
setup facilities. For more information refer to the Regard Master Card Operating Manual.
Modbus gateway card
The Regard Modbus gateway interface card provides a Modbus interface for Regard
systems. For more information refer to the Regard Modbus Gateway Card Operating
Manual.
Electromagnetic compatibility (EMC)
The Regard 8-input 4-20 module and display card have been tested for compliance with
the EMC Directive. Take the following steps to ensure compliance:
•Installation must follow the instructions given in this manual.
•Installation must also follow the Draeger document “Guidelines for the construction
and installation of Regard systems to comply with the EMC Directive” which is
available separately.
•Observe instructions to use screened cable, where given
Instructions or precautions that are essential for electromagnetic compatibility are
identified by “EMC!” in the margin.

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
8
Display card front panel controls and indicators
Display Display normally shows gas level of each head in sequence. When an alarm occurs,
display shows gas level of head(s) in alarm only.
Display Meaning
h1:0 Gas level for head 1 (gas level is 0)
h8:3 Gas level for head 8 (gas level is 3)
36:12 Alternative display of gas level, showing Regard channel
number instead of head number.
(E.g. gas level of channel 36 is 12.)
h1:FSD (‘FSD’ blinking) indicates that head 1 is over-range, i.e. the
gas level exceeds the current FSD setting. See also Set
over-range latch on page 28.
12:HCAL Indicates that the head on channel 12 is in calibration mode
FAULT.. Operational fault
LEDs
LED State Meaning
A3 No function
A2, A1, Fault Off
Flashing
On
No alarm
Alarm tripped, not acknowledged
Alarm tripped & acknowledged
Power On
Flashing DC power on Operational fault
Inhibit
On
Blinking on (normally
off, on every 2.5 s)
Blinking off (normally
on, off every 2.5 s)
Relays inhibited
Relay(s) disabled
Relays inhibited + relays disabled
Push buttons
Function of front panel controls during normal operation:
Push button Function
Display gas name. E.g. h1:CO2
Display gas units. E.g. h2:PPM
SHIFT + Display A1 trip level.
Arrow after number indicates rising () or falling () alarm
E.g. h3:20
SHIFT + Display A2 trip level. E.g. h3:40
Display next head (channel).
Display previous head (channel).
+ Hold / release current channel.
(Press both push buttons at same time.)
RAcknowledge / reset alarm

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
9
Input module terminals
RS-485 OUTPUT
DC INPUT 1
DC INPUT 2
B
A
0 V
24V
24V
0 V
24V
CH1
0 V
24V
CH2
0 V
24V
CH3
0 V
24V
CH4
0 V
24V
CH5
0 V
24V
CH6
0 V
24V
CH7
0 V
24V
CH8
0 V
4-20mA INPUT 2
4-20mA INPUT 1
4-20mA INPUT 3
4-20mA INPUT 4
4-20mA INPUT 5
4-20mA INPUT 6
4-20mA INPUT 8
4-20mA INPUT 7

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
10
Operational faults
An operational fault is a failure in operation of either the display card or input module.
Operational faults are either
•critical – card may stop working, or
•advisory – card will continue to work safely, but its functions may be limited
When an operational fault occurs:
•Power LED flashes once a second
•If fault is critical, fault relay alternately energises and de-energises at 1Hz
•Display shows fault code alternately with normal display
In the situation where multiple faults occur consecutively, the first fault to occur will be
displayed. When that is cleared subsequent faults may be displayed if they are
unaffected by the clearing of prior faults.
In the situation where multiple faults occur simultaneously, only one will be indicated on
the display. The fault states are monitored continuously in the following order:
C, CM, BR, B, B, B, B, BS, BR, RR, D, E, I, L and H.
Any of these may be overridden by the hardware exception faults M and We.
Press Rto clear the fault. If fault will not clear, or recurs, call DraegerService.
Operational fault codes
(See table on next page.)

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
11
Fault code Meaning Remedy
FAULT BR
FAULT BS
FAULT B
FAULT B
FAULT B
FAULT B
Push button fault. Advisory.
Push button indicated appears to be continuously pressed. Check push buttons.
FAULT C Communications error – Regard. Critical.
Communication with the master card has failed. Gas level
display continues and alarm relays will continue to operate,
but functions controlled by master card may not operate.
Check RS-485 connection
between master card and
display card.
FAULT CM Communications error – module. Critical.
Communication between display card and input module has
failed. No gas level measurements are available.
Check RS-485 connection to
input module.
FAULT D Data error. Critical.
Configuration settings have been corrupted. Default
configuration settings will be used.
Check configuration settings.
FAULT E EEPROM failure. Critical.
Configuration data has been lost. Default configuration
settings will be used.
Replace card.
FAULT H Supply voltage too high. Critical. Reduce supply voltage.
FAULT L Supply voltage too low. Critical. Increase supply voltage.
FAULT M Microcontroller failure. Critical.
Display card or input module has stopped working. Hold down Rto reset the card.
FAULT I Configuration settings corrupted. Advisory.
Settings held in RAM differ from those in EEPROM. EEPROM data will be
automatically reloaded.
Press Rto clear fault. If it
persists replace card.
FAULT RR Remote reset fault. Advisory.
Remote reset terminals appear to be continuously shorted.
The remote reset input will be ignored.
Check connections to remote
reset input.
FAULT We Watchdog reset. Advisory.
Unknown error caused card to reset. Card will continue to
operate normally.
Check installation.

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
12
INSTALLATION
Install input module
Fit input module on 35mm symmetric or 32mm asymmetric DIN rail.
EMC! Install the input module and display card in an enclosure that gives protection against
electromagnetic interference.
Handle circuit boards with care during installation. Do not touch the circuit board or
components. Take anti-static precautions were necessary.
Connect RS-485 output to display card
Connect RS-485 output of input module to screw terminals on Regard rack
corresponding to position of 8-channel display card.
•Use twisted-pair cable
•Maximum length of connection is 1 km.
•Ensure that 0V potential between input module and display card is less than ±5V. Use
RS-485 isolator(s) if necessary.
Do not connect the RS-485 output of the module to the terminals for a single-
channel 4-20 card or Ex card, or a HART card: this will damage the module.
1
2
3
5
4
6
7
8
9
10
11
12
13
14
15
16
B
A
REGARD RACK
B
A
4-20 MODULE
0 V
24V
24V
0 V

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
13
EMC! If cable between module and display card is routed outside enclosure:
•Use screened twisted-pair cable
•Pass the cable through a ferrite tube between the cable entry and the input module,
and between the cable entry and the display card
•Keep distance between cable gland and ferrite tube short.
Position of ferrite tube for input module:
A
B
Connect transmitters to input module
Refer to transmitter installation instructions.
Transmitters must be connected to the input module starting from Channel 1 and then
consecutively until all heads are attached or all ports are used.
EMC! Use screened cable to connect transmitters. Connect cable screen to earth where it
enters the enclosure that contains the input module.
4-20 MODULE
24V
CH n
0V
2-WIRE
TRANSMITTER
+
–
24V
CH n
0V
3-WIRE TRANSMITTER
(CURRENT SOURCE)
+
–
4-20mA
4-20 MODULE

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
14
WARNING – when using 3-wire transmitters, in order to ensure that a short circuit
between the 4-20mA output and the zero volt line at the transmitter causes a fault
indication on the display card, the cable resistance must be kept below the values shown
in the following table.
For example:
the transmitter takes typically 80mA,
under range fault trip has been set to 3.5mA on the display card,
then the cable core resistance must be kept below 12 ohms.
The formula used to generate the values in the table is
faulttran
fault
cable II I
R×−
×
<2
255
where:
cableRis the resistance in ohms of one core of the cable running from the input module
to the transmitter,
faultIis the under range fault current in mA set at the display card,
tranIis the current supply in mA from the input module to the transmitter.
This formula assumes that the three cores of the connecting cable each have the same
resistance.
Maximum cable resistance per core (in ohms) for fault currents of:
Transmitter
current (mA) 3.5mA 3.0mA 2.5mA 2.0mA
40 27.0 22.5 18.2 14.2
50 20.8 17.4 14.2 11.1
60 16.8 14.2 11.6 9.1
70 14.2 12.0 9.8 7.7
80 12.2 10.3 8.5 6.7
90 10.8 9.1 7.5 5.9
100 9.6 8.1 6.7 5.3
110 8.7 7.4 6.1 4.8
120 7.9 6.7 5.5 4.4
130 7.3 6.2 5.1 4.0
140 6.7 5.7 4.7 3.8
150 6.2 5.3 4.4 3.5

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
15
Connect DC supply to module
Connect DC supply to DC input 1 or 2.
POWER SUPPLY
18 – 35V DC
B
A
4-20 MODULE
0 V
24V
24V
0 V
+
–
Other input can be used to connect DC supply another module. Maximum current
allowed through input terminals: 1A
Ensure that the 0V potential between input module and display card is less than ±5V. If
potential difference exceeds 5V, use RS-485 isolator between input module and card.
Install 8-channel display card
Insert 8-channel display card into slot in Regard rack wired to 8-input module.
EMC! Tighten the screws on the front panel fully.

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
16
Optional connections
A1, A2, Fault alarm relays
If required, connect using screw terminals on Regard rack.
RELAYS SHOWN
DE-ENERGISED
FAULT
A2
A1
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
Remote reset
If required, connect normally-open contact to 8-channel display card, to remotely
acknowledge or reset alarms. Connect using screw terminals on Regard rack.
EMC! Use screened cable.
REGARD RACK
1
2
3
5
4
6
7
8
9
10
11
12
13
14
15
16

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
17
CONFIGURATION
Command mode
Configuration and maintenance of the display card is performed using front panel controls
and display, by setting the card into command mode.
In command mode:
•Gas levels are no longer displayed.
•The Inhibit LED lights and the Fault relay trips to indicate that operation of the alarm
relays is prevented (“inhibited”).
•Transfer of alarm status information to the Regard master card (if present) is
prevented.
•A1, A2 and Fault LEDs do not flash.
Function of front panel controls in command mode
Key Function
RConfirm entry or selection
Select next command or option
Increase displayed value
Select previous command or option
Decrease displayed value
Select next head
Select previous head
EXAMPLE
•Commands that allow a setting to be made for each head show the
head number after the command number, e.g. command 04–0 04–0:h1
•Whenever head number (e.g. h1) is shown, press or to
select a different head number, e.g. head 2 04–0:h2
Display may show Regard channel number in place of head number, if card
is set to display channel numbers (command 60-2).
E.g. 04–0:22
•Press Rto select head shown. Display shows command name … GAS NAME
… and then shows current setting for that head, e.g. h2:H2S
•Head number is shown before the setting.
Different head number can be chosen by pressing or … h3:CO2
…or, if card is set to display channel numbers: 22:CO2

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
18
Accessing command mode
Access to commands is password protected. Passwords allow access to maintenance
commands and configuration commands. Without entry of a password, some
configuration settings can be examined, but not changed.
DISPLAY
•Press the Rpush button for 5 seconds, until the display shows: 00–0
Software version is shown briefly, e.g.: v2.5
•Press or to select command number.
Entering a password
PRESS DISPLAY
•Select command 00–1 R PASSWORD
Waiting for entry of password, first character flashing ????
•Select first character of password. e.g. C C???
•Confirm first letter. Second character flashes. R CC??
•Select and confirm remaining characters R CCCC
Display shows access level, and exits command CONFIG
00–1
Factory setting of passwords:
•Configuration level: CCCC
•Maintenance level: MMMM
Changing a password
The password being changed is determined by the current access level.
PRESS DISPLAY
•Select command 00–3 R CHG P.WD
Waiting for entry of password, first character flashing ????
•Select first character of password. e.g. C D???
•Confirm first letter. Second character flashes. R DD??
•Select and confirm remaining characters R DEFG
Display shows access level, and exits command CFG:NEW
00–3

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
19
Save configuration settings
PRESS DISPLAY
•Select command 00–2 R SAVE
Asking for confirmation to save settings SAVE:NO
If no settings have been changed, display shows: SAVE:NO!
•Select YES SAVE:YES
•Confirm action… R WAIT
…confirmation that settings have been saved… SAVED:OK
…command exits 00–2
Locking card in command mode
Display card automatically exits command mode if no buttons are pressed for 10 minutes.
To prevent card from automatically exiting command mode, use command
60–0.
PRESS DISPLAY
•Select command 60–0 R CMD LOCK
NO
•Select YES to lock in command mode YES
•Confirm selection and exit command R LOCKED
60–0
Quit command mode
PRESS DISPLAY
•Select command 00–0 R QUIT:NO
•Select YES QUIT:YES
•Confirm action… R h2:50
Table of commands
(See next page.)

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
20
Cmd. Command Function Command mode level Default
No. Name Read Maint. Config. Setting
00–0 CMD QUIT Quit command mode •••
00–1 PASSWORD Enter password •••
00–2 SAVE Save settings ••
00–3 CHG P.WD Change password ••
04–0 GAS NAME Set gas name oo•CH4
04–1 UNITS Set gas units o o •%LEL
04–2 FSD Set FSD (range) o o •100
04–3 FSD LOCK Set over-range latching o •YES
04–4 A1 ENER. Set relays normally energised or o •ON ALARM
04–5 A2 ENER. energise on alarm o •ON ALARM
10-0 SET ZERO Set zero o •
10-1 SET SPAN Set span o •
10–2 DRIFT Set zero drift band •0.0%
10–7 FLT U/R Set under-range fault level o o •2.0
10–8 FLT O/R Set over-range fault level o o •OFF
11–0 HYST Set alarm hysteresis
•1.0%
11–1 A1 TRIP Set A1 alarm level o o •20
11–2 A2 TRIP Set A2 alarm level o o •40
11–4 A1 MODE Set A1 rising/falling o o •RISE
11–5 A2 MODE Set A2 rising/falling o o •RISE
11–7 A1 LATCH Set relays latching, non-latching, o •DNAK
11–8 A2 LATCH delay-latching, acknowledgeable, o •DNAK
11–9 F LATCH non-acknowledgeable o •DNAK
14–0 LED TEST Test display & LEDs •••
14–1 RMT TEST Test remote reset •••
14–4 A1 TEST Test A1 relay ••
14–5 A2 TEST Test A2 relay ••
14–6 F TEST Test Fault relay ••
14–8 TEST MOD Test input module communications ••
52–0 HEADs Set number of heads o o •h1 – h8
52–1 CARDs Set channel numbers o o •Ch0
52–4 USER Set user definable text
•????
52–6 CHECKSUM Set communications checksum
•CRC
60–0 CMD LOCK Lock card in command mode ••NO
60–1 DISPLAY Gas level display on / off
•ON
60–2 LEDs Set function of LEDs o o •COMMON
60–3 HEAD NUM Display head or channel number o o •HEAD h_
60–4 A1 DIS. Disable A1 relay ••NO
60–5 A2 DIS. Disable A2 relay ••NO
Key:
•Command available at this level, and setting can be changed
oCommand available at this level, but setting cannot be changed