2800 Laura Lane • Middleton, WI 53562 | 800.288.9383 • | www.tcsbasys.com
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Installation
QD2040C/D Power and Communication Connections
Power and Communication Connections
RS-485 Network Wiring
All controllers connected to the network must be programmed with the same communication baud rate as well as a
unique communication address from 0 to 255, excluding 248. On controllers with displays, this can be done from the
controller using its keypad and display, by using TCS Insight software, or by calling TCS Technical Support (800.288.9383,
ext. 2). TCS Technical Support can access the QD2040C/D online and change the address of a controller.
Use 22 AWG, twisted shielded three-conductor or two-conductor cable for network wiring. Network wiring should start
at one controller and go to the next and then go to the next, 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 connected to “REF” wires.
NOTE:
“A” refers to the negative (–) RS-485 connection and “B” refers to the positive (+) RS-485 connection.
A 120 Ω terminating resistor should be placed at each of the two ends of the network directly across the “A” and “B” wires.
•
If the QD2040C/D will be at one end of the network, hard-wire a 120 Ω terminating resistor across the “A” and “B”
terminals of the QD2040C/D (See
“Three-Wire Network Wiring” on page 5
).
If the QD2040C/D will be in the middle of the network, do not wire in the terminating resistor on the QD2040C/D terminal
block.
Connect one end (ideally the furthest end from the QD2040C/D) of the shield wire of the network wiring to earth ground.
NOTE:
If you encounter time-out errors, contact TCS Technical Support (800.288.9383, ext. 2).
PO
WER
C
ORD
USB
CABLE
ETHERNET
CABLE
Rx/Tx Activity LEDs
To Wall Outlet
To Internet
To Controllers
Not Used
USB PORT 2
USB PORT 1
USB PORT 4
USB PORT 3
CLOUD
ETHERNET 1
POWER
(12VDC)
HDMI
DP
REF
REF
B
A
B
COM 1
COM 2
A
USB
CABLE
To RS-485 Converter
(QD1010)
Local
Management
Port
Monitor Ports
(Admin Only)
LOCAL
ETHERNET 2
