Hybrid Analog And High Input Signal Selection Control System Example - Johnson Controls Penn System 450 Series Technical Bulletin

Hybrid Analog and High Input Signal Selection Control System Example

Figure 13 shows a System 450 hybrid analog output control system example using
a C450CPW-100 control module with the hybrid analog output controlling the
speed of an EC condenser fan motor (for the cooling equipment condenser) based
on condenser pressure.
This example uses two P499 pressure transducers and the High Input Signal
Selection feature to control the condenser fan speed based on the highest pressure
sensed by the two transducers. The cooling equipment is controlled by an A99
temperature sensor.
Figure 13 also shows a System 450 control system that is set up to use the High
Input Signal Selection feature to control the hybrid analog output signal and the
motor speed of an EC condenser fan motor on the cooling equipment condenser.
Figure 14 shows the System 450 UI Main screens, System Status screens, and
System Setup screens for the control system example in Figure 13.
* Connect cable shields at only one
point to any "C" terminal on the
Input Terminal Block.
Active/Passive Sensor DIP Switches
DIP Switch 1 and 2 are OFF; switch 3 is ON.
Figure 13: System 450 Hybrid Analog Output Control System Example with
Condenser Fan (EC) Motor Speed Control, High Input Signal Selection
32 System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin
C450CPW-100
Control Module
OUTA1
WIRING WIRING
24V Sn2 24V Sn2
C C
C C
Sn1 Sn3 Sn1 Sn3
5V 5V
C C
Electronically Commutated
(EC) Motor Speed Control
Input Circuit
C450SBN-x
Expansion Module
OUTR2
240 120
VAC VAC
L1
L2
L1 L2