10 • The DAC Outputs
026-1727 Rev 3
4.2. The DAC Outputs
The DAC has 15 relay outputs for connection to all
loads that are typically present for a rooftop unit. The
relay output type and function for each point must be
programmed in the DAC software by the installer.
The DAC supports the following relay outputs:
The DAC supports the following analog outputs:
For both relay and analog outputs, the DAC will
drive physical points as well as send the current
output value over MODBUS to E2.
4.2.1. Wiring Digital Loads on the
DAC
The digital output relays are located across four
separate connectors along the top side of the DAC.
Figure 4-9
- DAC Output Locations
Relay Output
Description
Alarm Active
Alarm Active Output
Cool Stage 1-4
Cool Stage Output
Dehumidifier Digital Dehumidification Active
Econ Enable
Economization Enabled
Fan Enable
Fan Enable
Primary Heat Stage 1-
2
Primary Heat Stage Output
Secondary Heat Stage
1-2
Secondary Heat Stage Out-
put
Reversing Valve
Heat Pump Reversing Valve
Output
Auxiliary (2)
Satellite Outputs Controlled
by E2
Reheat
Reheat Output
Table 4-5
- DAC Relay Outputs
Analog Outputs
Relay Outputs
Analog Output
Description
Mod Fan (VS)
Modulating Fan
Mod Cool (2)
Modulating Cool Stages
(including Digital Scroll
compressors)
Mod Heat
Modulating Heat
Mod Outdoor Air
Damper
Modulating Outdoor Air
Damper
Mod Return Air
Bypass
Modulating Return Air
Bypass
Mod Return Air
Damper
Modulating Return Air
Damper
Mod VAV Bypass
Damper
Modulating Variable Air
Volume Bypass Damper
Supply Air SP Reset Supply Air Setpoint Reset
Auxiliary (2)
Satellite Outputs Controlled
by E2
Table 4-6
- DAC Analog Outputs
Figure 4-10
- Digital Load Connectors
