Technical Guide
RS-485
Communications
Loop Connection
RS-485
Communications
Driver Chip
Comm
LED
Power
LED
Not
Diagnostic
Used
Blink Code
LED
Pull-up Resistors
For Analog Inputs
Analog Input
And Output
Terminal Block
Pressure Sensor
Modular Service
Tool - Mini Din
Connector
(AIN6 Modular Connection)
Typical
Pin 1
Indicator
RAM
Chip
EPROM
Chip
U3
1
RN1
CX1
U1
U2
CX2
U4
CX4
TB1
COMM
T
SHLD
R
CX5
LD6
COMM
LD7
PWR
1
U5
RS-485
COMM
HH
RAM EPROM
TUC-5R PLUS
(1 MEG)
YS101816 REV. 2
LD8
LED1
R1
C1
LD9
LED2
P1
+VREF
5.11V
TEST POINT
U7
RV1
VREF ADJ
EWDOG
R28
INPUTS
TB3
+VDC
RN5
AIN1
AIN2
AIN3
AIN4
AIN5
GND
C10
GND
AOUT1 C12
AOUT2
AIN7
GND
PJ1
C17
D15
C20
PU1
D6
PU2
D7
PU3
D8
PU4
D9
PU5
D11
PU7
D14
ADDRESS
SW1
ADD
1
2
4
8
16
32
TOKEN
NETWORK
JP1
X2
U13
CX13
U15
CX15
U6
U10
CX10
R15
C14
R19
U14
U12
CX14
C15
R22
R24
R25
CX6
CX12
1
U9
PAL
C7
1
D12
R13
SC1
D19
PRESSURE
SENSOR
R26
EXPANSION T'STAT
VR1
L1
VR2
PAL
Chip
COM1-3
R1
R2
R3
R4
R5
COM4-5
TB2
V4
V5
V1
V2
V3
U8
R6
C9
C13
C16
TB4
GND
24VAC
Real Time
Clock Chip
Expansion Board
(Modular Connection)
Figure 4: WMVAV Controller Component Locations
Not Used
Mounting Hole
Typ of 4
Mounting
Backplate
Relay Output
Terminal Block
Address Switch
EEPROM
24 VAC
Power Input
Controller Inputs and Outputs
General
The following inputs and outputs are available on the WMVAV controller and/or the various expansion boards that can be added to the main controller board expansion port. For component locations of the inputs on the WMVAV Controller see Figure 4. For wiring of inputs and outputs see Figure 5 and 6.
WMVAV Controller Analog Inputs:
Input #1: Space Temperature
The space temperature can be used for night setback control or it can be configured as the main control source instead of the default Supply Air
Temperature. If the optional push-button override sensor is installed, this input will detect user overrides from unoccupied back to occupied operation for a user adjustable amount of time. This sensor is not required if this is a cooling only air handler that doesn’t require night setback operation. The space temperature can also be configured to reset the Discharge Air Temperature Setpoint.
Input #2: Supply Air Temperature
The supply air is the default control source. This temperature is maintained at the Supply Air Cooling Setpoint during occupied hours of operation and during the Cooling Mode. If the unit is in Warm-Up or
Heating Mode, a separate Supply Air Heating Setpoint is maintained.
The air handler must always have a supply sensor installed.
WMVAV Controller
5
