Hardware Installation
32
Building Technologies
048_DMS_NK8000_ICC_MP4.40_A6V10062437_a_en.doc
Fire Safety & Security Products 06.2011
COM 1 … COM 4: RS232 connectors
RS232 lines are connected to 9pin D-Sub connectors, female type
Pin Assignment
NK822x COM 1-4 NK823x COM 1-2 NK8235.4: COM 3-4
1 CD CD
2 RXD RXD RXD
3 TXD TXD TXD
4 DTR DTR
5 GND GND GND
6 DSR DSR
7 RTS RTS
8 CTS CTS
9 RI RI
LON connection (CS6 Guarto)
NK822x - CN3: LON
LON connections
Pin Assignment
1
2
3
4 LON-A
5 LON-B
A LON TP/FT-10 network segment can be set up for bus- or free topology. LON
repeaters can connect the segments. Up to four LON repeaters (such as NK8020)
might be used to extend the size of a LON network.
See 4.5, “LON interface” on page 19 for additional information.
Characteristic Bus topology Free topology
Max. cable length (UTP Cat.4) [m] 1’400 500
Termination
2 100, 1/8W
at each end of segment
1 50, 1/8W
at centre of segment
Max. number of nodes per segment 64
Max. number of repeaters 4
Polarity insensitive Yes
NK822x has a built-in termination resistor (100Ω) for a doubly terminated bus to-
pology that can be enabled by closing the internal jumper JP6.
See Fig. 2 p. 18, and section 4.5 p. 19.
i
Please refer to the Echelon Manual for detailed specification on how to set up a
LON network: http://www.echelon.com/Support/documentation/
, section: Engi-
neering Bulletins → Media & Wiring
DIN Rail installation
The modules are supplied in a plastic box that can be easily attached to the DIN
rail by hooking it on the top of the rail and pressing it in on the opposite side. To
detach the box, pull downward on the tab located at the rear of the module. The I/O
modules are mounted the same way.
i
Before removing the box, carefully disconnect the flat cable (bus) of the I
2
C mod-
ule, as well as the power supply cables.
To Next Page
Loading...
