WattMaster VAVBOX - Manual (Page 4)

Technical Guide
VAVBOX Controller 4
Figure 3: VAVBOX Controller Component Locations
Typical
Pin 1
Indicator
RAM
Chip
Snap Track
For Controller
Mounting
EPROM
Chip
PAL
Chip
Communications
Driver Chip
24 VAC Power
Terminals
Air Flow Sensor
Modular Connector
Room
Sensor Wiring
Terminals
Auxiliary
Wiring
Terminals
Communication
Wiring
Terminals
Expansion Board
Modular Connector
“SCAN” LED
“REC” LED
Power LED
Damper Actuator
Modular Connector
Damper Actuator
Positioning Relay
“Open”
Damper Actuator
Positioning Relay
“Close”
Address Switch
(Set Between 1 & 58)
CX6 SW1 U10
75176
EXP
ANSION
Q3
Q2
D3
VR1
7824
GND
R
SHLD
GND
GND
AUX2
AUX1
AUX
+VS
TMP
T
24VAC
R17
R16 U7
C7
R15
POWER
R21
R35
YS101
562
REV
3
D4
R26
LD3
L1
SCAN REC R12
C6
R1
1
TOKEN
NET
LD2
32
R14
R13
R100
LD1
C5
D1 K1
V2
V3
K2
D2
ACTUA
TOR
R10
R9
PJ2
V1
C4
EPROM
VREF ADJ
R23
C10
EWDOG
COMM
D7
CX10
R25
R28 T'STAT
U1
1
C15
R20
C1
1
R24
8
16
2
4
ADDRESS
ADD
1 U6
U5
R19
U9 CX9
R32
D5
C14
P.U.
R22
C13
R27
D5
RAM
C9
C8
80C55
2
CX5
PJ1
C3
R8
R7
R5
R6
R4
C2
C1
X1
U2
R1
R2
R3
CX2
Q1
16L8
R34
FLOW
U8
1
RN1
CX8 U4
R18
CX4
U3
CX3
U1
PA
L
CX1
Controller Overview
Figure 2: OE322 Output Expansion Boards