2800 Laura Lane • Middleton, WI 53562 | 800.288.9383 | www.tcsbasys.com
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Installation
QD3041 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 MS/TP communication address from 0 to 127.
Use 22 AWG, twisted shielded three-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.
Place a 120 Ω terminating resistor at each of the two ends of the network directly across the “A” and “B” wires.
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If the QD3041 will be at one end of the network, hard-wire a 120 Ω terminating resistor across the “A” and “B” termi
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“Three-Wire Network Wiring” on page 5
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If the QD3041 will be in the middle of the network, do not wire in the terminating resistor on the QD3041 terminal
block.
Connect one end (ideally the furthest end from the QD3041) of the shield wire of the network wiring to earth ground.
NOTE:
If you encounter issues with your network wiring or communications, contact TCS Technical Support (800-288-
9383, ext. 2).
Rx/Tx Activity LEDs
To Controllers
Not Used
USB PORT 2
USB PORT 1
USB PORT 4
USB PORT 3
L
C
ETHERNET 2
ETHERNET 1
POWER
(12VDC)
HDMI
DP
REF
REF
B
A
B
COM 1
COM 2
A
Not Used
Not Used
Local
Mgmt. Port
(Admin Only)
Monitor Ports
(Admin Only)
ETHERNET
CABLE
To Network Port or Cellular Modem
PO
WER
C
ORD
To Wall Outlet
