Penn System 450 Series Installation Instructions

System 450™ Series Control Modules with Analog Outputs Installation Instructions
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Binary Input Control for Relay Outputs
You can connect a binary input (dry contacts) to any of the three System 450 control module inputs (Sn1, Sn2, or
Sn3) and control the output relays in your control system based on the binary input’s state (open or closed).
An input (Sn-1, Sn-2, or Sn-3) that is set up as a binary input can only be referenced by a relay output. Inputs set
up as binary inputs are not available for selection on analog outputs.
When a relay output references a sensor that is set up as a binary input, the On and OFF parameter screens are
not available as you set up the output. The relay output’s On/Off state is controlled by the binary input’s Closed/
Open state and any of the timer parameters (ONT, OFFT, ONd, or OFFd) that you set up for the relay output. Refer
to the Binary Input Control for Relay Outputs section of the System 450™ Series Modular Control Systems with
Standard Control Modules Technical Bulletin (LIT-12011459) for more information.
High Input-Signal Selection
The High Input-Signal Selection feature enables a System 450 control system to monitor a condition (temperature,
pressure, or humidity) with two or three sensors (of the same type) and control relay, analog, or both outputs based
on the highest condition value sensed by the two or three referenced sensors.
In two sensor applications (HI-2), Sn-1 and Sn-2 must be the same Sensor Type. In three sensor applications
(HI-3), Sn-1, Sn-2, and Sn-3 must be the same Sensor Type.
A System 450 control system that uses High Input-Signal Selection can monitor the outlet pressures of two
condenser coils in a multi-circuit condensing unit using two pressure sensors of the same type—one connected to
each coil outlet.

Penn System 450 Series Specifications

General

Brand	Penn
Model	System 450 Series
Category	Control Unit
Language	English