81VCCX-454 Controller Technical Guide
APPENDIX C: BACNET GUIDE
BACnet Connection to MS/TP or IP Network
MS/TP connection
to BACnet network
Wiring Notes:
1. All wiring to be in accordance with local and national electrical codes and specifications.
2. All communication wiring to be 18-gauge minimum, two-conductor, twisted pair with shield.
Use Belden #82760 or equivalent.
18-30 VAC
GND
Line Voltage
Size Transformer For
Correct Total Load.
VCCX-454 Controller = 15 VA
Programming Note:
Use Settings Menu in the LCD display
to program the BACnet settings.
®
SH
T -
R +
Typical Terminal Blocks. All
Wiring To Be R+ To R+, SH
(G)To SH (G) &T-ToT-
Ethernet connection
to BACnet network
ALARM
UP
DOWN
ENTERMENU
LT1785
LT1785
RELAY CONTACT
RATING IS 1 AMP
MAX @ 24 VAC
RS-485 COMM
LOOP WIRE
“R” TO “R”,
“T” TO “T”,
“SHLD” TO “SHLD”
24 VAC POWER
ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
www.aaon.com
VCCX-454
CONTROLLER
AAON P/N: ASM07503
BINARY INPUTS
BI1 = PROOF OF AIRFLOW
BI2 = DIRTY FILTER
BI3 = HOOD ON/OFF
BI4 = REMOTE OCCUPIED
BI5 = A2L AIRSTREAM LEAK DETECT
BI6 = A2L CABINET LEAK DETECT
BI7 = NOT USED
BI8 = EMERG SHUTDOWN
ANALOG INPUTS
AI1 = SPACE TEMPERATURE
AI2 = SPACE SLIDE OFFSET
AI3 = SUPPLY AIR TEMPERATURE
AI4 = RETURN AIR TEMPERATURE
AI5 = BUILDING PRESSURE
AI6 = SUPPLY AIR TEMP RESET
AI7 = OUTDOOR AIR TEMPERATURE
AI8 = NOT CONNECTED USE DUCT
STATIC CONNECTOR
LABEL P/N
G127590
DUAL
E-BUS
+24 VAC
GND
MAIN FAN
RELAY 2
RELAY 3
RELAY 4
RELAY 5
RELAY 6
RELAY 7
RELAY 8
RELAY
COMMON
BACNET +
MAIN SUPPLY FAN VFD
ECONOMIZER/WSE
MOD HEATING
FAN VFD
EXHAUST/RETURN
BACNET SHIELD
BACNET –
= SH
= R
DUCT
STATIC
10/100
ETHERNET
USB FLASH
ONLY
= T
= AO2
= AO1
= AO3
= AO4
4
5
4
Figure 32: VCCX-454 BACnet Connection to MS/TP or IP Network
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