7.3 System Behaviour; 7.3.1 System Behaviour Based On 4 To 20 Ma Signals - Dräger REGARD 3000 Mode D'emploi

7.3 System behaviour

7.3.1 System behaviour based on 4 to 20 mA signals

The following table describes the system behaviour in the various input signal areas.
0 mA to
0.1 mA
Measured
Display
value display
System infor-
mation display 4-20 mA sig-
nal fault
Gateway Mod-
2)
NaN
ule measured
value output
Gateway Mod- Error in the
ule system notification
information and confirma-
tion register
Relay config- Last switching
ured to alarms status is
3)
retained
Relay config- Fault relay
ured to spe- activated,
cial signals other relays
retain the last
switching state
0.1 mA to Underrange
minimum to
Underrange
minimum Underrange
maximum
Current mea-
Display
sured value
, , ,
Under range
1)
Current mea-
2)
NaN
sured value
Error, warn- None
ing, informa-
tion, Inhibit in
the notifica-
tion and confir-
mation
1)
register
Last switching Switching as
status is per configura-
tion
3)
retained
Depending on Information
the system relay acti-
configuration vated, no input
signal-depen-
dent switching
action in the
other relays
Underrange 4 mA to
maximum to 20 mA
4 mA
Current mea- Current mea-
sured value sured value
None None
Current mea- Current mea-
sured value sured value
None None
Switching as Switching as
per configura- per configura-
tion tion
No input sig- No input sig-
nal-depen- nal-depen-
dent switching dent switching
action action
20 mA to Overrange
minimum to
Overrange
minimum Overrange
maximum
Current mea-
Display
sured value
None
Over range
Current mea- Current mea-
sured value sured value
None Over range
notification in
the notifica-
tion and confir-
mation register
Switching as Switching as
per configura- per configura-
tion tion
No input sig- Information
nal-depen- relay acti-
dent switching vated, no input
action signal-depen-
dent switching
action in the
other relays
Overrange
maximum to
38 mA
Display
Measure-
ment signal
fault
2)
NaN
Error in the
notification
and confirma-
tion register
Last switching
status is
3)
retained
Fault relay
activated,
other relays
retain the last
switching state