Johnson Controls System 450 Series Installation Instructions Manual page 3

Active/Passive Sensor DIP Switches
DIP Switch 1 is Off; switch 2 is ON.
Figure 3: Example System 450 Heat/Cool System with Condenser Fan Speed Control
Table 1: System 450 Analog Output Control Module Terminal Wiring Information
Label Terminal Function
24V Accepts 24 VAC supply power, when a C450YNN power module is not connected,
and provides power terminal for 24 VAC (humidity) sensors.
5V Provides 5 VDC power for active sensors.
S1, S2, S3 Accepts passive or active (0-5 VDC) input signals from control sensors.
C Provide low-voltage Common connections for 24 VAC power and passive or active
(Three sensors connected to the 5V, Sn1, Sn2, and Sn3 terminals.
Terminals)
Note: The three C terminals are connected internally and can be connected to
ground in the field.
AO1, Provides a self-detecting analog output signal in conjunction with the COM
AO2 terminal; either 0–10 VDC or 4–20 mA.
COM Provides a self-detecting analog output signal in conjunction with the AO1 or AO2
terminal; either 0–10 VDC or 4–20 mA.
System 450™ Series Control Modules with Analog Outputs Installation Instructions
Analog Output
Signal
L1 L2
L1
L2
Wire Sizes
2
0.8 mm to 1.5 mm
28 AWG to 16 AWG
2
0.08 mm to 1.5 mm
28 AWG to 16 AWG
2
2
3