R
2800 LAURA LANE • MIDDLETON, WI 53562 • (800) 288-9383 • FAX (608) 836-9044 • www.tcsbasys.com
3
RS-485 Controller Network
Wiring & Setup
All controls connected to the network will need to be
programmed with the same communication baud rate as
well as a unique communication address from 0 to 255,
excluding 248. 9600 Baud is recommended. On control-
lers with displays, this can be done using the keypad and
display, or using TCS Insight software, or by calling TCS
Technical Support. TCS Technical Support can access
the QWL 3.1 Rev 2 Series Panel online and change the
address of a controller.
Use 22 AWG, twisted shielded 3-conductor cable for
network wiring. Network wiring should start at one con-
troller and go to the next and then go to the next, and
so on until the final controller is reached. Wiring is such
that all "A" wires are connected to "A" wires, all "B" wires
are connected to "B" wires, and all "REF" wires are con-
nected to "REF" wires.
A 120 Ω terminating resistor should be placed at each of
the two ends of the network directly across the "A" and
The QWL 3.1 Rev 2 Series Panel at
end of the network.
The QWL 3.1 Rev 2 Series Panel in
the middle of the network.
1
3
2
Shielded, twisted 3-conductor com-
munications wiring with one end earth
grounded. (120
Ω
balancing resistors
provided.)
Can use up to the total of 64 controllers.
For more controllers, will need to add
another QD1010 to the QWL 3.1 Rev 2
Series Panel.
4
NOTES:
1. If using more than 64 control-
lers, use additional QD1010
adapters.
2. Each controller must use the
same baud rate and be assigned
a unique address.
"B" wires. If the QWL 3.1 Rev 2 Series Panel will be at
one end of the network, hard wire a 120 Ω terminating
resistor across the "A" and "B" terminals at the QWL 3.1
Rev 2 Series Panel (See 1 below).
If the QWL 3.1 Rev 2 Series Panel will be in the middle
of the network, do not wire in the terminating resistor on
the QWL 3.1 Rev 2 Series Panel terminal block (See 2
below). Finally, connect one end (ideally the furthest end
from the QWL 3.1 Rev 2 Series Panel) of the shield wire
of the network wiring to earth ground. TCS recommends
a 250 milliseconds time out period for all wired networks,
and 1000 milliseconds for wireless networks. If you
encounter timeout errors please contact tech support.
NOTE:
In the middle of the network, all network wiring
shields should be twisted together and taped off to pre-
vent accidental grounding. More than one ground on the
shield can result in communication failure.
NOTE:
A maximum of 2 terminating resistors can be
used. See below.
A
B
REF
Shield
A
B
REF
A
B
REF
Earth Ground
Only at one end
Drain
Wire
Last in Daisy Chain
120
Ω
Terminating
Resistor
...
COM 1
REF
REF
A
A
B
B
Drain
Wire
..
.
120
Ω
Terminating
Resistor
A
B
REF
A
B
REF
A
B
REF
.
.
.
Last in Daisy Chain
Shield
Last in Daisy Chain
Earth Ground
Only at one end
120
Ω
Terminating
Resistor
A
B
REF
A
B
REF
A
B
REF
Shield
Drain
Wire
COM 1
REF
REF
A
A
B
B
120
Ω
Terminating
Resistor
1
2
3
3
4
4
4
To RS-485 port on
panel board (see
panel wiring)
