The document describes the Dräger Safety REGARD gas detection control system. It is a modular system that can be customized for customer requirements. It monitors flammable, toxic and other gases. The system includes input cards that receive signals from gas detectors, output cards that control alarms and relays, and display cards that show gas readings. It allows remote monitoring over protocols like Modbus.

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REGARD
CONTROLLER

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System Solutions
Control systems
for all kinds of applications will be
supplied by the Dräger System
Centres tailored to the customers
requirements meeting the highest
demands.
REGARD is a modular gas detection control
System designed for the continuous monitoring
of flammable, toxic and/or other gases.
The base of REGARD is a special Cardframe
(rack) in combination with the different types of
Control-, Channel-Cards and Modules

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Input cards & modules
• 4..20 mA channel card
• SE EX channel card
• Optical card
• HART card
• 8 channel input module

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Output, control and display cards
• Master card
• Modbus card
• 8-channel display
card
• Relay display card
• Relay modules

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• Each channel card is connected to an individual
transmitter
• Each channel card provides alarm relays, an analog
output and a remote reset.
• A four character display indicates the gas concentration
of the connected transmitter.
• Push buttons at the front allow to display the gas name
and the measuring range as well as configuration of the
system.
General informationen

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4-20 mA / SE Ex channel cards
Four character LED-Display to show the current gas
concentration and the configuration commands.
Six LED´s to show A1, A2, A3/FAULT-STATUS,
POWER ON- and INHIBIT-STATUS.
Control buttons RESET,UP,DOWN for alarm
acknowledgement and Card-configuration.
4..20mA Card only:
One analog input for all 2- or 3-wire 4-20mA
measuring heads (24V DC max 700mA).
SE-Ex Card only:
One Analog input for all 3-wire SE-Ex
measuring heads (PELLISTOR) (max. 9V DC
at 100-350 mA).
Three Alarm Relay A2, A2, A3/ Fault.
Each relay provides a single pole change over contact
rated at 5 AMP 250 V AC.
One anlog output 4-20mA, 0-20mA, 1-5V AND 0-5V
for data processing to other systems.
Remote reset input.

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Master card
Provides common and voted alarms, common Reset
push button and a common remote Reset Input.
Four character Led-Display to show the configuration
commands.
Six Led´s to show MA1, MA2, MA3/FAULT-STATUS,
POWER ON- and INHIBIT-STATUS.
Control buttons RESET,UP,DOWN for alarm
acknowledgement and Card-configuration.
Three Alarm Relays MA1, MA2, MA3 for common or
voted alarms
Each relay provides a single pole change over contact
rated at 5 AMP 250 V AC.
Remote reset input.
Note:
Presently only a one way communication is provided.
A bi-dirctional communication will come later.

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Provides a interface for the REGARD-system with
the Modbus Protocol.
Other systems with the Modbus Protocol, for example
Foxboro or PC´s runnig Software like FIX-Intellution,
can read gas level information and alarm status out of
REGARD system.
Connection to the Modbus card is via RS-232, RS-422
and RS-485.
Fourt character Led-Display to show the configuration
commands.
Six led´s to show A1, A2, A3/FAULT-STATUS (no
funktion), POWER ON- and INHIBIT-STATUS.
Control buttons: RESET,UP,DOWN,LEFT,RIGHT for
card-configuration.
Modbus card

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HART card
•Eight character Led-Display to show the current
gas concentration of each Meassuring head
and the configuration commands.
•Six led´s to show A1, A2, A3/FAULT-STATUS,
POWER ON- and INHIBIT-STATUS.
•Control buttons: RESET,UP,DOWN,LEFT,RIGHT for
alarm acknowledgement, head selection and
card-configuration.
•Digital input to connect up to 9 Transmitter
POLYTRON 2 in HART-configuration ("Multidrop").
•Three Alarm Relay A1, A2, A3/ Fault.
Each relay provides a single pole change over contact
rated at 5 AMP 250 V AC.
•Remote reset input.

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8-channel display card & module
•Eight charater Led-Display to show the
current gasconcentration and the
card configuration.
•Module connection via
RS-485 link to the DISPLAY- CARD.
•Only 2 wires are neede.
•The distance between module and card
is up to 1000 m.
•Each Module has 8 inputs for
2- or 3-wire 4-20mA measuring heads.
• Three Alarm Relay A1, A2, A3/ Fault.
Each relay provides a single pole change over contact
rated at 5 AMP 250 V AC.

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Relay display card & module
•Eight charater LED-Display to show
relay on/off Status and card configuration.
•Module connection via RS-485 link to the DISPLAY-CARD.
•Only 2 wires are needed.
•The distance between module and card is up to 1000 m.
•Each Module has 16 Relays.
The RELAY-DISPLAY- CARD controls up to 16 MODULES
(256 relays).
•Each relay provides a single pole change over contact rated at
5 AMP 250 V AC.