Ground fault monitoring (FM compliance)
26
Building Technologies
001260_k_en_--.doc
Fire Safety & Security Products
02.2005
6.2
Programming ground fault monitoring
CT
CC
CC
B3Q...
J1
J2
X30
E3X10.
J1
J2
X30
X60
E3X10.
J1
J2
X30
X60
E3I040
X30
E3G080
X2
2)
1)
3)
3)
Emergency operation circuit
C-Bus
I-Bus
I-Bus
CT
Galvanically isolated circuits
Control unit
1) Ground fault monitoring 'control unit' (jumper 'X60') may only be active
within an electrically connected C-Bus network. (preferably always
in the station with C-Bus address 1)
once
2) The C-Bus potential shall only be allocated to system ground in
(jumper 'X30'). (preferably always in the station with
C-Bus address 1)
one station
3) The jumper must be inserted
at each LON-Bus module so
that the ground fault monitoring
'LON-Bus' is active.
B3Q...
J1
J2
X30
E3G070
X60
1)
2)
C-Bus
I-Bus
B3Q...
J1
J2
X30
CI
CT
CT
I-Bus
Stations which have their own power supply and
which are not linked together by the emergency
operation circuit are regarded as separate circuits
with their own ground fault monitoring.The jumper
'X60' must be inserted
.
at each station
CC
B3Q...
J1
J2
X30
E3X10.
J1
J2
X30
X60
2)
1)
CT
B3Q...
J1
J2
X30
E3G070
X60
1)
2)
CI
I-Bus
I-Bus
C-Bus
B3Q...
J1
J2
X30
B3Q...
J1
J2
X30
E3X10.
J1
J2
X30
X60
CC
E3M140
C-Bus
interactive line E3M071
E3M071/E3M140
integrated ground
fault monitoring
E3I020
RS232
E3I020
RS232
Ground fault
monitoring active,
detected at the
main board
LON-Bus
RS232 interface
monitored
not monitored
2)
1)
2)
2)
LON-Bus
LON-Bus
2)
1)
2)
2)
2)
E3M...
E3G...
E3L...
E3M071
Emergency operation circuit
Emergency
operation
circuit
z
Outgoing lines which are activated by galvanically isolated contacts cannot influ-
ence the control unit in the event of ground fault, and therefore, they don't need
to be monitored!
z
If a connection is security-relevant, and an RS232 interface is being used, be
sure to make an optical link.
z
If galvanically isolated relays are used, make sure that the 3
rd
party system takes
over the ground fault monitoring function.
z
Ground fault monitoring reacts if the resistance is:
a)
≤
4 k
Ω
from positive potential to ground, or
b)
≤
16 k
Ω
from negative potential (system ground) to ground