Discharge Air Controller (DAC) Manual
Input and Output Setup • 11
The normally-open relay outputs on each
connector share the same common and are not fused.
Make sure to use the same voltage for all loads
connected to the relays.
4.2.2. Wiring Analog Outputs on the
DAC
The analog outputs are located on a separate 12-
pin connector.
The DAC provides six opto-isolated analog
outputs. Because the analog outputs are opto-isolated,
they must be separately powered by a 24V supply.
For the outputs to function properly, connect a
24VAC supply (separate from the controller’s main
supply) to terminals 28 and 29. The same transformer
used to power the devices controlled by the analog
outputs (e.g., damper actuator) may be used to supply
power to terminals 28 and 29.
Figure 4-11
- Relay Output Wiring
Terminal Number
on Connector
Name
70
Relay 1
71
Common for Relays 1-3
72
Relay 2
73
Relay 3
76
Relay 4
77
Relay 5
78
Relay 6
79
Relay 7
80
Common for Relays 4-8
81
Relay 8
84
Relay 9
85
Relay 10
86
Common for Relays 9-10
87
Relay 11
88
Relay 12
89
Relay 13
90
Common for Relays 11-15
91
Relay 14
92
Relay 15
93
Table 4-7
-Digital Relay Output Connector Terminal Numbers
Figure 4-12
- Analog Outputs Connectors
Figure 4-13
- Analog Output Wiring
CAUTION! The devices controlled by these
analog outputs must be powered separately
with another transformer (do not use the same
secondary of the controller’s power) in order to prevent
the outputs from malfunctioning or being damaged.
Terminal Number
on Connector
Name
21
Analog Output 1
22
Analog Output 2
23
Analog Output 3
Table 4-8
-Digital Relay Output Connector Terminal Numbers
