System 450 Standard Control Modules - Johnson Controls Penn System 450 Series Technical Bulletin

System 450 Standard Control Modules

A System 450 standard control system can provide the following types of control
to your application equipment:
• On/Off Control, including multi-stage control for temperature, pressure, and
humidity applications. (See Relay Outputs on page 18 for more information.)
• Proportional Analog Control, including multi-stage control for temperature,
pressure, and humidity applications. (See Analog Outputs on page 20 for more
information.)
• Combination of On/Off Relay and Analog Output Control, with up to 10
outputs per control system and any combination of relay and analog outputs.
• Multi-Stage Control (Relay or Analog) for temperature, pressure, and
humidity applications.
• Multi-Purpose Control, including simultaneous control of temperature,
pressure, and humidity conditions.
• Stand-Alone Control. A single standard control module can be quickly and
easily configured to replace a wide variety of specialized controls in the field.
• Direct and Reverse Action Proportional Control. See Direct and Reverse
Control Actions for Analog Outputs on page 20 for more information.
• Proportional Plus Integral Control. See Proportional Plus Integral Control
and Integration Constants on page 23 for more information.
• High Input Signal Selection allows you to monitor a condition with two or
three identical sensors at different locations in your controlled system and
control system outputs according to the highest condition value sensed by the
sensors. See High Input Signal Selection on page 24 for more information.
• Differential Control allows you to monitor and control a condition differential
in a controlled system; for example, the water pressure drop across an in-line
water filter. See Differential Control on page 25 for more information.
• Hybrid Analog Output Control on C450CPW-100 control modules enables
an analog VDC output to transition to a pulse output at low signal levels,
providing more efficient low-speed control of Electronically Commutated
(EC) motors in condenser fan applications. (See Hybrid Analog Output on
page 14 for more information.)
Note: System 450 standard control modules do not include reset control,
real-time clock, setback scheduling control, or load balancing capabilities.
These features are available on the System 450 reset control modules only.
Refer to the System 450 Control Systems with Reset Control Modules
Technical Bulletin (LIT-12011842) for more information about reset control
modules and reset control systems. Only the C450CPW-100 model
provides a hybrid analog output for direct control of EC motors. See
Hybrid Analog Output on page 14 for more information.
System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin 9