START-UP & COMMISSIONING
54
VCB-X Controller Field Technical Guide
Addressing, Baud Rate & Powering Up
Before Applying Power
In order to have a trouble free start-up, it is important to follow a
few simple procedures. Before applying power for the
fi
rst time, it
is very important to correctly address the controller and run through
a few simple checks.
Controller Addressing and Baud Rate
All VCB-X Controllers are equipped with address switches. If
the VCB-X Controller is to operate as a stand-alone system (not
connected to any other HVAC unit or VAV/Zone Controllers), the
controller address switch should be set for address 1. When using the
Modular Service Tool or System Manager to program and con
fi
gure
the VCB-X Controller, you would enter this address to communicate
with the controller. When the system is to be connected to other
HVAC unit controllers on a communication loop, each controller’s
address switch must be set with a unique address between 1 and 59.
Address switches 7 and 8 are used for the baud rate selection.
See
Figure 40
below for address switch and baud rate setting
information.
Power Wiring
One of the most important checks to make before powering up the
system for the
fi
rst time is to con
fi
rm proper voltage and transformer
sizing for each controller. Each VCB-X Controller requires 8 VA of
power delivered to it at 24 VAC. You may use separate transformers
for each device (preferred) or power several devices from a common
transformer. If several devices are to be powered from a single
transformer, correct polarity must be followed.
WARNING
: Observe Polarity! All boards must be wired with
GND-to-GND and 24 VAC-to-24 VAC. Failure to
observe polarity will result in damage to one or
more of the boards.
Check all wiring leads at the terminal block for tightness. Be sure
that wire strands do not stick out and touch adjacent terminals.
Con
fi
rm that all sensors required for your system are mounted in
the appropriate location and wired into the correct terminals on the
VCB-X Controller.
After all the above wiring checks are complete, apply power to the
VCB-X Controller.
Figure 40: VCB-X Controller Address Switch and Baud Rate Setting
VCB-X Controller
Note:
The Power To The Controller Must
Be Removed And Reconnected
After Changing The Address
Switch Settings In Order For Any
Changes To Take Effect.
Caution:
Disconnect All Communication Loop
Wiring From The Controller Before
Removing Power From The
Controller. Reconnect Power And
Then Reconnect Communication
Loop Wiring.
MADE IN USA
16
32
Baud 0
Baud 1
8
4
2
1
Address Switch Shown Is
Set For Address 1
Address Switch Shown Is
Set For Address 13
Controller
Address Switch
Address 1 @ 9600 Baud
ADD
ADD
ADD
The Address For Each Controller
Must Be Unique To The Other Controllers
On The Local Loop And Be Between 1 and 59
BAUD RATE SELECTION
Switch 7 Switch 8
9600
Baud
57600
OFF
OFF
ON
OFF
16
32
Baud 0
Baud 1
8
4
2
1
Address 5 @ 57,600 Baud
ADD
CommLink IV
Communication Setting
CommLink 5
BACNET
TB7
R68
T-
SH
R+
3650
X
ENTER
UP
DOWN
ALARM
CANCEL
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
www.orioncontrols.com
VCB-X CONTROLLER
Orion No.: OE335-26B-VCBX
AAON : V28940
AAON Coil: J00142
ANALOG INPUTS
AI1
= SPC (SPACE TEMP SENSOR)
AI2
AI3
AI4
AI5
BI1
BI2
BI3
BI4
AO1
AO2
AO3
TR1
= SAT (SUPPLY AIR TEMP SENSOR)
= OAT (OUTDOOR AIR TEMP SENSOR)
= DCT (DIGITAL COMP DISCH TEMP SENSOR)
= SPACE TEMPERATURE SLIDE OFFSET
= EMERGENCY SHUTDOWN
= PROOF OF FLOW
= DIRTY FILTER
= COIL TEMP SWITCH
= FAN VFD
= ECONOMIZER
= MOD HEATING
= DIGITAL COMP
UNLOADER
(24 VAC & UNLOAD
TERMINALS)
BINARY INPUTS
G OUTPUTS
TRIAC OUTPUT
ANALO
WattMaster Label
#SW000061
Rev.: 1A
E-BUS
EXPANSION
E-BUS
EXPANSION
+24
VAC
GN
D
FAN
RELAY 2
RELAY 3
RELAY 4
RELAY 5
RELAY 6
RELAY
COMMON
Revised 10/30/12
