JOHNSON CONTROLS
76
FORM 100.50-NOM7 (808)
Service
Table 15 lists the description of the various inputs and outputs, and the respective connections to the MOD-DCU.
TABLE 15 – INPUT/OUTPUT TABLE
I/O NAME
1
INPUT TYPE SIGNAL LEVEL APPLICATION
Space Sensor AI 1 1K RTD ALL
Space Sensor Adjust AI 2 1.5K POT ALL
T’Stat Interface AI 3 0-5V ALL
CO2 AI 4 0-5V DEMAND VENTILATION
Return Temperature AI 8 1K RTD DIFF. ENTH. ECONO
Outside Air Temperature AI 6 1K RTD ALL
Return Air Humidity AI 7 0-10V DIFF. ENTH. ECONO
Outside Air Humidity AI 5 0-10V SINGLE ENTH. ECONO
Duct Static Pressure AI 9 0-5V VAV
Building Static Pressure AI 10 0-5V POWER EXHAUST
Supply Temperature AI 13 IK RTD ALL
* Compressor Circuit #1 Status BI 1 24VAC ALL
** Compressor Circuit #2 Status BI 2 24VAC ALL
Not Used BI 3 24VAC
Furnace Model #1 Status BI 4 24VAC GAS HEAT, 1 MODULE
Furnace Model #2 Status BI 5 24VAC GAS HEAT, 2 MODULE
Furnace Model #3 Status BI 6 24VAC GAS HEAT, 3 MODULE
G (fan) Supply Fan BI 7 24VAC ALL
Occupied/Unoccupied Switch BI 8 24VAC ALL
Shutdown BI 9 24VAC ALL
Smoke Purge BI 10 24VAC ALL
Supply Fan Status (fan proving) BI 11 24VAC ALL
Filter Status (dirty lter) BI 12 24VAC DFS OPTION
HW Freezestat BI 14 24VAC HW
Cool-Heat COR Status BI 15 24VAC ALL
VFD Bypass Input BI 16 24VAC VAV W/ VFD BYPASS
Supply Fan VFD AO 1 0-10V VAV
Exhaust Fan VFD or Damper AO 2 0-10V POWERED EXHAUST
OA / RA Damper & Full AMS AO 3 0-10V ALL
Heating Valve AO 6 0-10V HW
Cooling/Heating Stage #1 BO 1 ALL
Cooling/Heating Stage #2 BO 2 ALL
Cooling/Heating Stage #3 BO 3 ALL
Cooling/Heating Stage #4 BO 4 ALL
Cooling/Heating Stage #5 BO 5 30 TON UNITS
Cooling/Heating Stage #6 BO 6 30 TON UNITS
Cool/Heat Changeover Relay BO 7 ALL
Supply Fan BO 8 ALL
Exhaust Fan BO 9 POWERED EXHAUST
VAV Heat Relay BO 10 VAV
NOTES: AI = Analog Input
BI = Binary Input
AO = Analog Output
BO = Binary Output
* Compressors 1 & 2 combined.
** Compressors 3 & 4 combined.
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