Siemens Cerberus CS1140 Manual page 157

Building Technologies
Fire Safety & Security Products
12 Test LED "H5": For fault diagnosis LON interface
LED "H5" Error diagnosis of communication to B3Q440 control console
Function
LED on continuously
LED flashes
LED inactive
13 Jumper "X2": Ground fault monitoring 'LON-Bus'
'out' = inactive (factory setting)
'in' = active
(for details application –> see chapter 6)
14 Resistor "R151": Line termination element for the communication circuit to the
B3Q440 control console
The LON communication circuit must be terminated at both ends with a resistor
100 Ω.
Resistor R151 inserted
–
Resistor R151 not inserted
–
Unit at end of the line
E3G080
R151
100Ω
E3G080 Control module "Extinguishing"
Status
program in LON-IC not loaded
network parameter LON not loaded
LON normal operating mode
= unit at end of the line
= no unit at end of the line
B3Q440
R2
Unit at end of the line
B3Q440
R2
100Ω
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02.2005