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MODEL PXU - TEMPERATURE/PROCESS CONTROLLERS

GENERAL DESCRIPTION

The PXU controller accepts signals from a variety of temperature sensors

including thermocouple or RTD. The controller can also be configured for

process inputs including 0 to 5/10 VDC, 0/4 to 20 mA DC, or 0 to 50 mV DC.

The PXU can provide an accurate output control signal (time proportional or DC

Analog Output) to maintain a process at a determined setpoint value. Dual

4-digit display readings allow viewing of the temperature/process and setpoint

value simultaneously. Front panel indicators inform the operator of alarm and

control output status. Comprehensive programming features allow this controller

to meet a wide variety of application requirements.

MAIN CONTROL

The PXU allows the user to select between PID, On/Off and Manual control

mode. The PXU has the ability to provide 2 control outputs. The control outputs

can be individually configured for Reverse or Direct (heating or cooling)

applications. The PID tuning constants can be established via on-demand auto-

tune. The PID constants can also be programmed, or fine-tuned, through the

front panel or a PC and then locked out from further modification.

ALARMS

Alarm(s) can be configured independently for absolute high or low acting

with balanced or unbalanced hysteresis. They can also be configured for

deviation and band alarm. In these modes, the alarm trigger values track the

setpoint value. Adjustable alarm hysteresis can be used for delaying output

response. The alarms can be programmed for Automatic or Latching operation.

A selectable standby feature suppresses the alarm during power-up until the

temperature stabilizes outside the alarm region.

CONSTRUCTION

The PXU is constructed of a lightweight, high impact, black plastic textured

case with a clear display window. Modern surface-mount technology, extensive

testing, plus high immunity to noise interference makes the controller extremely

reliable in industrial environments.

SAFETY SUMMARY

All safety related regulations, local codes and instructions that appear in the

manual or on equipment must be observed to ensure personal safety and to

prevent damage to either the instrument or equipment connected to it. If

equipment is used in a manner not specified by the manufacturer, the protection

provided by the equipment may be impaired.

Do not use this unit to directly command motors, valves, or other actuators not

equipped with safeguards. To do so can be potentially harmful to persons or

equipment in the event of a fault to the controller. If redundant safeguards are not

in place, an independent and redundant temperature limit indicator with alarm

outputs is strongly recommended.

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PID CONTROL

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ACCEPTS TC and RTD

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ACCEPTS 0-10 V, 0/4-20 mA or 0-50 mV SIGNALS

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FUNCTIONS AS A DIGITAL POT

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ON DEMAND AUTO-TUNING OF PID SETTINGS

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DC ANALOG CONTROL OUTPUT (OPTIONAL)

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2 USER PROGRAMMABLE FUNCTION BUTTONS

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PC (MODELS WITH RS 485) OR FRONT PANEL PROGRAMMING

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1/16, 1/8 or 1/4 DIN

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CONTROLLERS MEET IP65 REQUIREMENTS

Bulletin No. PXU-D

Drawing No. LP0932

Released 09/15

Tel +1 (717) 767-6511

Fax +1 (717) 764-0839

www.redlion.net

C

US LISTED

UL

R

13RW

PROCESS CONTROL EQUIPMENT

(48.0)

1.89

1.89

(48.0)

(45.0)

1.77

1.77

(45.0)

6

5

4

3

2

1

12

11

10

9

8

7

15

14

13

16

17

18

0.26

(6.70)

3.14 (79.70)

0.31

(7.80)

0.47 (11.88)

0.83 (21.0)

DIMENSIONS In inches (mm) - 1/16 DIN

PANEL CUT-OUT

CAUTION: Risk of electric shock.

When the power is on, DO NOT touch the AC terminals, an electric shock may

occur. Make sure the power is disconnected when you check the input power

supply.

1. Prevent dust or metallic debris from falling into the controller and causing malfunctions. DO

NOT modify the controller.

2. The PXU is an open-type device. Make sure it is installed in an enclosure free of dust and

humidity in case of an electric shock.

3. Wait for one minute after the power is switched off to allow the unit to discharge. DO NOT

touch the internal wiring within this period of time.

CAUTION: Risk of Danger.

Read complete instructions prior to

installation and operation of the unit.