Dräger REGARD 7000 - Prerequisites for plants conforming to NFPA 72

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Operation
– For the alarm with the highest safety-oriented significance, only
acknowledgement types LNAK and LPAK are approved. For further information,
see the following chapter: "Alarm confirmation modes", page 66
With multiple outputs for the highest alarm, deviations are permitted (e.g. for
acoustic alarm devices).
– Follow the REGARD 7000 Safety Manual (order no. 90 33 497) for a system in
the field of functional safety. The REGARD 7000 Safety Manual can be
downloaded from Dräger ServiceConnect
®
(https://www.serviceconnect.draeger.com).
– Safety-oriented switch operations are only permitted to be triggered via the
REGARD 7000 relay outputs.
– All controls, including digital inputs and Modbus inputs, should be protected
against incorrect operation and unauthorised access.
7.3 Prerequisites for plants conforming to NFPA 72
– The installation of plant components and lines must be carried out in accordance
with NFPA 72.
– The lines between the relay output and actuator must be monitored for short
circuits, line breaks and earth faults (Ground Fault).
– Lines are not permitted to be used for fire and gas warning devices and other
plants simultaneously.
– Acknowledgement options are only permitted to be set up in the control room.
– An insulation monitoring relay (Ground Fault Detector) should be installed
between the power supply and REGARD 7000.
Dräger recommends using the insulation monitoring relay CM-IWS.1 type P or S
from the firm ABB.
For perfect insulation monitoring, all system components being monitored
should be operated free of earth potential. For further information, see the
instructions for use for the insulation monitoring relay.
– Alarms for fire and carbon monoxide should be identified accordingly.
– For outputs for alarms (Fire / Carbon Monoxide Alarm), errors (Trouble Signal)
and warnings (Supervisory Signal), the alarm repetition (Resound) must be
activated.
– The power supply for Dashboards should be kept separate from the power
supply of the Docking Stations.
The concepts for the status messages below differ on the NFPA 72 and on the
REGARD 7000. The table below shows the unique assignment of the terms:
NFPA 72 REGARD 7000
Fire Alarm Alarm
Trouble Signal Fault
Supervisory Signal Warning
Silence Acknowledge