Analog Inputs - Johnson Controls METASYS VAV110 Technical Manual

Power, Zone
4 2 F 4 3 F 4 4 F
Bus, and N2
Connections

Analog Inputs

4 5 F 4 6 F 4 7 F
36 VAV Controller—Variable Air Volume Controller
The 24 VAC power connection to VAV100/101 is at the quick connects
identified as 24 VAC Power and Common. The 24 VAC power connection
to VAV110/111 or VAV140/141 is at the far left two positions of the 3-
position screw terminal block. The removable terminal block also allows
you to disconnect power to the VAV without disrupting the 24 VAC that is
daisy-chained to other controllers.
Zone Bus may be hard-wired to the VAV Controller instead of using the
phone jack as described later in this technical bulletin. The Zone Bus
connection to VAV100/101 is at the far left position of the 4-position
terminal block identified as ZBUS/COM-N2 REF/N+/N2-. The Zone Bus
connection to VAV110/111 or VAV 140/141 is at the far right position of
the 3-position screw terminal block identified as 24 VAC/COM/ZBUS.
For all VAVs, the other side of the two wire Zone Bus, the common side,
may be connected to any available Common terminal.
The N2 connection to VAV100/101 is at the 4-position screw terminal
block identified as ZBUS/COM-N2 REF/N2+/N2-. The N2 connection to
VAV110/111 or VAV140/141 is at the 3-position screw terminal block
identified as REF/N2-/N2+. The N2 screw terminal block is removable to
allow you to disconnect the communication trunk without disrupting the
N2 that is daisy-chained to other controllers.
The six analog input terminals, their power supply, and their common
points occupy the terminal strip. These inputs may be of two types:
resistive or voltage. The VAV Controller processes and controls the
configured control strategy. It reads the analog inputs through the analog
input DIP switches located directly above the analog input terminals.
You use these switches and HVAC PRO for Windows to select the type of
analog input. Use T for all RTD temperature sensors and setpoint
potentiometers. Use 10V for DPT-2015 differential pressure transmitters.
For 3-wire voltage transmitters such as the DPT-2015 Series, use the
15 VDC power supply terminals next to the inputs for AI 6. You can
source 90 mA from 15V supply. The following table shows each
configuration.
Table 9: Analog Input Configurations
AI Type
Voltage (V)
Voltage (V)
Resistance
Slaving
Range
0 to 2 VDC
0 to 10 VDC
(T)1000 ohm Nickel,
Platinum, Silicon,
2k Potentiometer
(T)1000 ohm Nickel,
Platinum, Silicon,
2k Potentiometer
Switch Position-Set
SW1 SW2
V 2 V
V 10 V
T 2 V
V 2 V