6
SmartSequencing™ 101
SmartSequencing requires that a pair of wires be connected between the
Primary OUT terminals of one sequencer to the Secondary IN terminals of
a second sequencer. SmartSequencing is polarity independent, so it does
not matter which terminals are used at the IN port or the OUT port. Two
wire runs connecting two or more units create a SmartSequencing chain.
Furman SmartSequencing™ products can be connected end-to-end to
form a chain of sequencers. Each Contractor Series unit has two com-
munication ports (OUT and IN) divided into 4 terminals, responsible for
half-duplex transmissions via two bi-directional current loops. The mes-
sages between connected devices are communicated in the form of ASCII
character strings utilizing a proprietary data link protocol.
The first SmartSequencer within a chain is referred to as the “Primary”
or “Primary Unit”. The Primary unit controls the other sequencers in
the chain. The other sequencers are termed “Secondary” or “Secondary
Units”. The Primary Unit only has one active current loop because the
Primary Unit only has one Secondary sequencer attached to it. Sec-
ondary units have two active current loops because they are inserted
between two sequencers. A chain of sequencers is created by connect-
ing the PRIMARY OUT terminals of one sequencer to the Secondary IN
of the next downstream sequencer.
A Furman SmartSequencing™ chain communicates using a bucket
brigade technique. A Primary Unit communicates to the first Secondary
Unit downstream by sending commands out of its Primary OUT terminals
to the Secondary IN terminals of the first downstream Secondary Unit. If
there is an additional Secondary Unit in the chain, the first Secondary Unit
will communicate to the additional Secondary Unit using its Primary OUT
terminals to the second Secondary Unit’s Secondary IN terminals. This
continues down the sequence chain until the last Secondary Unit. The
last Secondary Unit will receive commands into its Secondary IN terminal
port but will not use its Primary OUT terminal port (because there are no
Secondary Units after it). Please see figure above:
SmartSequencing™ commands between units are always accepted
when continuity exists, however SmartSequencing commands that control
the outlets are not always honored. This may occur if the Miniports
switch settings of conditions conflict with the requested SmartSequencing
command. For example: BYPASS switch, REMOTE Input, EVS, or FORCE
OFF may have priority over the SmartSequencing command.
Additional SmartSequencing™ information is available throughout this
manual and also on the website www.furmancontractor.com. Details
such as connection diagrams and a Quick Start Guide, etc., can also be
found at the website.
P
P
S
S
SMARTSEQUENCING
OUT
IN
P
P
S
S
OUT
IN
P
P
S
S
OUT
IN
PRIMARY
SECONDARY
SECONDARY
