Johnson Controls METASYS VAV110 Technical Manual page 27

Grounding and
3 3 F 3 4 F 3 5 F
Isolation
VAV100/101
L
N
See the CAUTION
below Figure 9
To
Load
Figure 8: Transformer and Relay Isolation Wiring Diagram for Series
Table 5: Actuator VA Requirements
Actuator
EDA-2040 (ATP-2040)
VA-7150
VA-7200
VA-8020
VA-8050
J Series Electric Zone Valve
M9100-A, M9200-A
M9100-G, M9200-G
VA-7152
VA-7202
VA-8022
VA-8052
On unit mounted controls, OEMs typically minimize
wiring between digital controls and equipment interface
relays by using one leg of the stepdown transformer
as common.
Power
Transformer
Contactor
Type
Incremental
Incremental
Incremental
Incremental
Incremental
On-Off
Floating
Proportional (Voltage or Current)
Voltage (0 to 10 VDC)
Voltage (0 to 10 VDC)
Voltage (0 to 10 VDC)
Voltage (0 to 10 VDC)
Isolation
Transformer
24/24
ZBUS
AREF
N2+
N2-
Isolation
Relay
100/101 VAV Controllers
VAV Controller—Variable Air Volume (VAV) Controller 27
VA Requirements
for 24 VAC Supply
3 VA
2.7 VA
5.5 VA
4 VA
6 VA
7 VA
6.5 VA
6.5 VA
4.7 VA
7.5 VA
4 VA
6 VA
+15VDC +15VDC
ZBUS
AREF
N2+
N2-
24VAC
24VAC
24VAC
24VAC
24VAC
24VAC
24VAC
24VAC
visoxfmr
VAV100 / 101