Siemens AlgoRex CS1140, Planning, Page: 16 / 126

Bus systems
16
Building Technologies 008725_h_en_--
Fire Safety & Security Products 06.2011
6.1 Overview of buses
Features C bus I bus LON bus Data bus
Field of application local system bus internal in control panel local data bus for floor
repeater display
local data bus for parallel
display, mimic displays or
relays
Transfer speed 57 kbaud 1000 kbaud 78 kbaud SPI bus 2 kHz
Length of line max. 1000 m
(G51 Ø0.8: 1400m)
max. 3 m
(inside housing only)
max. 500 m as
free topology
max. 1000 m
as stub line
max. 1000 m
Number of participants
and/or addresses ... 16
C bus stations
... 16
I bus plug-in modules
... 32
LON bus devices
... 24
max. 8 addresses
Number of wires 2
(+3 wires for degraded
mode)
26 2 6
(+3 wires for supply)
Cable type twisted 1) flat cable twisted twisted
Loop line
4
– – –
T-branch
– –
4
see page 78
–
Short-circuit-proof yes
every participant with
isolator
– no yes
Network structure master/master master/slave master/slave master/slave
Prompt event-controlled,
presence-monitored
in cycles,
event-controlled
event-controlled
presence monitoring
(every 60 s)
in cycles
typ. every 250 ms
Principle serial bus
–
Cerberus protocol
– collision detection
– Manchester coding
C bus
–
Cerberus protocol
– SPI/Motorola
network
–
Echelon chip (LON
protocol)
– Cerberus specific
telegram
serial bus
–
Cerberus protocol
Special feature – – – –
Features D bus interactive AnalogPLUS bus Collective line FDnet
Field of application for interactive
detectors
for AnalogPLUS
detectors
for collective
MS6/7/9 detectors
for Sinteso
TM-
devices
Transfer speed 4.8 kbaud 2 messages/sec. (AC signal) 4 messages/sec.
Length of line see doc. 001508
(max. 120

/300 nF)
see doc. 001508
(max. 150

/300 nF)
see doc. 001508
(max.50/150/250

/4

F)
see doc. 001508
(max.210

/330 nF) 2)
Number of participants
and/or addresses ... 128
D bus devices
(interactive)
... 128
D bus devices
(AnalogPLUS)
1 address
(max. 25 detectors)
... 126
FDnet devices
(Sinteso)
Number of wires 2 2 2 2
Cable type twisted twisted
(untwisted permitted)
twisted
(untwisted permitted)
all cable types permitted
(twisted recommended)
Loop line
4 4
–
4
T-branch
4
any
– –
4
Only one T-branch per-
mitted between 2 devices
Short-circuit-proof yes
participants depending
on type
with/without isolators
yes
every participant
with isolators
no yes
every participant
with isolators
Network structure master/slave master/slave master/slave master/slave
Prompt in cycles
–
typ. every 3 sec.
– interrupt in event of
alarm
in cycles
–
typ. every 64 sec.
– interrupt in event of
alarm
– in cycles
–
typ. every 32 sec.
– interrupt in event of
alarm
Principle sensor/actor bus
–
Cerberus protocol
’K51’
– serial 8 bit
sensor/actor bus
–
Cerberus protocol ’K31’
– serial 8 bit
– starting up: daisy-chain
conventional
–
current gain principle
– voltage thresholds
sensor/actor bus
–
Siemens protocol ’P2’
– serial 32 bit
– starting up: daisy-chain
Special feature detector parameters
download
– – diff. parameter sets
can be chosen
1) calibrated for cable impedance: 50

(MICC) / 110

(G51, Ø0.8 mm not shielded)
2) 500 nF for unshielded cables