connecting serial control cables
6
DBC1220GL Installation Manual Rev I.docxx
Determine Your Requirements
Serial ports are used to interconnect other
dimmers, smart control panels, sensors and AV
controllers. Serial port devices can be identified by
4 terminals, labelled: GND, DATA+, DATA-, +VE.
Serial Cable Connections
There is one RS485 port for DyNet signals, in the
form of a RJ12 socket, on the front panel, which is
used for the temporary connection of a PC or a
DPP601 Portable Programmer. There are data
terminals on the control card, for permanent
connections. The recommended cable for
connections to the serial port is screened, stranded
RS485 data cable with three twisted pairs.
Recommended cable types include:
Belden:
9503
Dynalite:
DYNET-STP-CABLE
Garland:
MCP3S
Hartland:
HCK603
M&M Cable:
B2003CS
M&M Cable:
B9503CS
Multicables:
AWM E120236 2092 20
RS Components:
368-687
Dynalite
DYNET-STP-CABLE
One pair is paralleled for GND, one pair paralleled
for +VE and one pair used for DATA+ and DATA -.
Recommended
Cable Colour Coding
Green/White pair:
Paralleled for GND
Orange/White pair:
Paralleled for +VE
Blue/White pair:
Blue for DATA+
White for DATA-
Brown/White pair:
Spare or for Join
The colour-coding scheme used is not critical, as
long as the same scheme is used throughout the
installation.
Serial Cable Connecting Method
The recommended connecting method is to ‘daisy
chain’ devices (starting at the first device, then
looping in then out of devices, with a single cable
terminating at the last device. There should not be
any spurs or stubs, and only the first and last
device should terminate one cable. All other
devices should terminate two cables). Devices
may be wired in any order. The data cable should
be segregated from any mains cables.
A data
cable that is connected to an energised dimmer is
live. Do not cut or terminate live data cables
. If the
data cable has to cross over any mains cables, it is
recommended that it do so at a 90
angle.
RJ12 Socket Connections
Serial Cable Permanent Connections
Connect Data Cable in a ‘Daisy Chain’
