Datalink Characteristics; Lon; Serial Interface (Rsxxx); Modems - Siemens DMS8000 Applications And Planning Manual

NK8000 Network planning
5.4

Datalink characteristics

5.4.1

LON

5.4.2

Serial interface (RSxxx)

Transceiver Media Max. Nodes
per Segment
RS 232 3 wires point-to-point
RS 422 2 twisted point-to-point
pairs
RS 485 1 twisted ~32, depending
master-slave pair on addressing
RS 485 2 twisted ~32
pair depending on
addressing
5.4.3

Modems

Transceiver Media Max. Nodes
per Segment
Tele- point-to-point
phone
Line cat.
3
Wireless
68
Building Technologies
Fire Safety & Security Products
LON transceiver type: FTT-10 topology:
–
Doubly terminated bus topology
–
Free topology
Speed: 78kbps (given by FTT-10)
Cable type: any kind of twisted pair cable, UTP (Unshielded Twisted Pair) preferred
Cable length: Depends on cable quality
–
Typ. 1'400m for doubly terminated bus topology (UTP Category 3), up to 2'400m
with perfect cabling
–
Typ. 500m for free topology (UTP Category 3)
Max. nodes per segment: 64
Max. nodes per sub-network: 128
Max. number of repeaters per sub-network: 4 (5 segments)
Detailed specifications:
http://www.echelon.com/Support/documentation/
Section: Engineering Bulletins → Media & Wiring
Topol- Max.
ogy Speed
PTP 115kbps
PTP 1Mbps*
bus 1Mbps*
bus 1Mbps*
Topol- Max.
ogy Speed
PSTN 56kbps
analog
64 kbps
ISDN basic
rate Inter-
face
GSM
DMS8000_Application_Specification_&_Planning_MP4.10_A6V10063710_a_en
Connector Max. Distance
Type without spe-
cial HW
D-Sub 9 15 Meter
D-Sub 25
RJ 45
1km*
1km*
1km*
Connector Max. Distance
Type without spe-
cial HW
World-wide
over the PSTN
(public
switched tele-
phone network)
World-wide
over the GSM
(Global System
for Mobile
communica-
tions)
Remarks URL
www.phoenixcontact.de
www.wut.de
* speed-
distance
trade-off
* speed-
distance
trade-off
* speed-
distance
trade-off
Remarks URL
www.westermo.se
www.blackbox.com
www.zyxel.com
06.2007