Fuji Electric PXZ Operating Manual

TABLE OF CONTENTS

Model Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Outer Dimensions and Panel Cutout Size . . . . . . . . . . . . . . . . . . . . . . . . 5

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Wiring Instructions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Front Panel Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Front Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Autotuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Programming

1. Primary Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2. Secondary Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Appendix A: Autotuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Appendix B: Manual Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Appendix C: Heater Break Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Appendix D: Heat/Cool Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Quick Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1

PXZ SERIES

Operation
Manual

PID Autotune
Controllers
Featuring Fuzzy Logic

P X Z

V

1

Front panel size Code
1/16 DIN 4
1/8 DIN 5
72mm 7
1/4 DIN 9

Kinds of input Code
Thermocouple (°C) T
Thermocouple (°F) R
RTD/Pt100 (°C) N
RTD/Pt100 (°F) S
4-20mA DC, 1-5V DC B
0-20mA DC, 0-5V DC A

Control output 1 Code
Relay contact (reverse action) A
Relay contact (direct action) B
SSR/SSC driver (reverse action) C
SSR/SSC driver (direct action) D
4 to 20mA DC (reverse action) E
4 to 20mA DC (direct action) F

Control output 2* Code
None Y
Relay contact (reverse action) A
Relay contact (direct action) B
SSR/SSC driver (reverse action) C
SSR/SSC driver (direct action) D
4 to 20mA DC (reverse action) E
4 to 20mA DC (direct action) F
*not available on PXZ-4 type

Alarm Options Code
Heater break alarm* 2
Process alarm & Heater break alarm* 3
None 4
Process alarm 5
*not available on PXZ-4, or with 4-20mA DC output

Power Supply Option Code
24V AC/DC Supply D

MODEL CONFIGURATION

ACCESSORIES (Sockets: only for PXZ-4 and sold separately)

____________________________________________________

8-pin sockets (for PXZ-4 without H / L Alarm Option)
ATX1NS Solder Type Socket (UL)
PG-08 Screw-down type (terminals on back)
ATX2PSB Screw-down type socket (terminals on back) (UL)
TP28X Screw-down type socket (terminals on front) (UL)
11-pin sockets (for PXZ-4 with H / L Alarm Option)
PG-11 Screw-down type (terminals on back)
TP311SB Screw-down type socket (terminals on back)
TP311S Screw-down type socket (terminals on front)

Heater Break Current Sensing Transformer:

CTL-6-SF For heater current (1 to 30 amps)
CTL-12-S36-8F For heater current (20 to 50 amps)
____________________________________________________

Free Technical Support:

1-800-235-8367 U.S. & Canada

802-863-0085 Int’l

8:30 A.M.- 6:00 P.M. E.S.T.

V4.98.5

SAFETY PRECAUTIONS

Before using this product, the user is requested to read the following
precautions carefully to ensure safety. The safety requirements are
classified as either “warning” or “caution” according to the following
explanations:

Warning

Wiring

1. If there is danger of serious accident resulting from a failure or
defect in this unit, provide the unit with an appropriate external pro­tective circuit to prevent an accident.

2. The unit is normally supplied without a power switch or a fuse. Use
power switch and fuse as required (Rating of the fuse: 250V, 1A)

Power supply

1. Be sure to use the rated power supply voltage to protect the unit
against damage and to prevent failure.

2. Keep the power off until all of the wiring is completed so that elec­tric shock and trouble with the unit can be prevented.

General

1. Never attempt to disassemble, modify, or repair this unit. Tampering

with the unit may result in malfunction, electric shock, or fire.

2. Do not use the unit in combustible or explosive gaseous atmos-

pheres.

Caution

Installation

1. Avoid installing the unit in places where:

• the ambient temperature may reach beyond the range of -10 to
50°C (32 to 122°F) while in operation

• the ambient humidity may reach higher than 90% RH while in oper­ation

• a change in the ambient temperature is so rapid as to cause con­densation

• corrosive gases (sulfide and ammonia gas, in particular) or com­bustible gases are emitted

• the unit is subject to vibration or shock

• the unit is likely to come in contact with water, oil, chemicals,
steam, or vapor

• the unit is exposed to dust, salt, or air containing iron particles

• the unit is subject to interference with static electricity, magnet­ism, or noise

• the unit is exposed to direct sunlight

• heat may be accumulated due to radiation

Maintenance

1. Do not use organic solvents such as alcohol or benzene to wipe this
unit. Use a neutral detergent.

2. Three-year warranty is guaranteed only if the unit is properly used.

FEATURES

• Fuzzy Logic Control

• PID Autotune with manual override - heating or cooling

• Programmable control action - reverse or direct

• Programmable cycle time

• Programmable inputs - Thermocouple/RTD, or,
Current/ and Voltage

• Sensor burn-out protection

• Input calibration by user

• Outputs: Relay, Solid-state relay drive, and 4-20mA DC

• Secondary output for
cooling (optional)

• High/low alarm
outputs (optional)

• Heater break alarm (optional)
(only on PXZ-5, 7, 9)

• Menu driven format

• Setting – touch keys on front panel

• Programmable 8-segment ramp/soak function

• Digital filtering (to suppress factory noise)

• Adjustable setpoint range

• Selectable °F/°C

• Offset adjustments

• Programmable decimal point

• Programmable lock-up feature

• Advanced security options to prevent unauthorized parameter
changes

• 4-digit, LED indication

• Output status indication

• Fault indication

• Non-volatile memory

• 1/16, 1/8, 1/4 DIN and 72mm panel mount package

• NEMA 4X faceplate

• ABS plastic housing

• Termination—screw-down type (PXZ-5, 7, 9) or socket with screw­down terminals (PXZ-4)

• Metal mounting bracket; plastic bracket for PXZ-4

• 85 to 264V AC free voltage power supply

• 24V AC/DC power supply (optional)

• UL, C-UL, and CE approvals

• 3-year warranty

2

INTRODUCTION

Thank you for purchasing the Fuji Electric PXZ controller. All of these
controllers are PID Autotune controllers that employ Fuji Electric’s
patented fuzzy logic algorithms.

It is a fully programmable temperature/process controller incorporat­ing many user-friendly features. The following easy-to-use instruc­tions are intended to help you understand, set up, effectively operate,
and achieve optimal performance from your PXZ controller. When
programmed and operated within the guidelines set up for them in this
manual, your PXZ controller will give you years of precise, reliable
control. If needed, we will provide free technical support throughout
the life of the controller.

Warning

Caution

suggesting that the user's mishandling can
result in personal death or serious injury.

suggesting that the user's mishandling can result
in personal injury or damage to the property.

3

SPECIFICATIONS

INPUT RANGE TABLE:

________________________________________________________
Input Signal Input Range Input Range Remarks

(°C) (°F)

________________________________________________________

Thermocouple

J 0~800 32~1472 Cold Junction
K 0~1200 32~2192 compensating
R 0~1600 32~2912 function built-in
B 0~1800 32~3272
S 0~1600 32~2912
T -199~200 -328~392
T -150~400 -238~752
E -199~800 -328~1472
N 0~1300 32~2372
PL2 0~1300 32~2372

________________________________________________________

RTD

Pt100 -150~850 -238~1562 Allowable wiring

resistance 10 ohms
max (per wire).

________________________________________________________

DC Voltage/
Current

1-5V Scaling Range: -1999 to 9999 For current input,

0-5V Engineering Units use the 250Ω

resistor to
4-20mA obtain 1-5V DC or
0-20mA 0-5V DC input.

________________________________________________________

CONTROL FUNCTION

(SINGLE OUTPUT)
________________________________________________________

Control action PID control with auto-tuning

Fuzzy control with auto-tuning

________________________________________________________
Proportional band (P) 0-999.9%, of full scale (FS), setting in 0.1% steps

________________________________________________________
Integral time (I) 0-3200 sec, setting in 1 sec steps

________________________________________________________
Differential time (D) 0-999.9 sec, setting in 0.1 sec steps

________________________________________________________
P,I,D = 0: 2-position action
I,D = 0: Proportional action

________________________________________________________
Proportional cycle 1-150 sec, setting in 1 sec steps, for relay contact

output and SSR/SSC drive output only

________________________________________________________
Hysteresis width 0-50% FS, setting in 1 E.U. (Engineering Units)

steps, 2-position action only

________________________________________________________
Anti-reset wind up 0-100% FS, setting in 1 E.U. steps, auto-setting

with auto-tuning

________________________________________________________
Input sampling cycle 0.5 sec

________________________________________________________
Control cycle 0.5 sec

________________________________________________________

CONTROL FUNCTION

(DUAL OUTPUT) (Heat/Cool Type)

________________________________________________________
Heating Proportional band P x 1/2 (P= 0-999.9%)

________________________________________________________
Cooling Proportional band Heating proportional band

x Cooling proportional band coefficient
Cooling proportional band coefficient= 0-100
0: 2-position action

________________________________________________________
Integral time 0-3200 sec for heating and cooling

________________________________________________________
Differential time 0-999.9 sec for heating and cooling

________________________________________________________
P,I,D= 0: 2-position action (without dead band) for heating and cooling
I,D= 0: Proportional action

________________________________________________________
Proportional cycle 1-150 sec, for relay contact output and SSR/SSC

drive output only

________________________________________________________
Hysteresis width 2-position action for heating and cooling: 0.5% FS

2-position action for cooling: 0.5% FS

________________________________________________________
Anti-reset wind-up 0-100% FS, setting in 1 E.U. steps, auto setting

with auto-tuning

________________________________________________________
Overlap/dead band ±50% of heating proportional band

________________________________________________________
Input sampling cycle 0.5 sec

________________________________________________________
Control cycle 0.5 sec

________________________________________________________

OUTPUT

(Single Output)

________________________________________________________
Control output One of the following three types is selected:

(1) Relay contact (SPDT)

220V AC/30V DC, 3A (resistive load)
Mechanical life: 10

7

times (under no load)

Electrical life: 10

5

times (under the rated load)

(2) SSR/SSC drive (voltage pulse):

15-30V DC at ON/0.5V DC or less at OFF.

Current 60mA or less.

(3) 4-20mA DC:

Allowable load resistance– 600Ω or less.

________________________________________________________

OUTPUT

(Dual Output)

________________________________________________________
Control output For dual output type, one of the following three

types is selected on both heating and cooling
types:
(Not available on PXZ-4 type)
(1) Relay contact (SPDT):

220V AC/30V DC, 3A (resistive load)

(2) SSR/SSC drive (voltage pulse):

15-30V DC at ON/0.5V DC or less at OFF.
Current: 60mA or less

(3) 4-20mA DC:

Allowable load resistance – 600Ω or less

(Note: When SSR/SSC drive output for heating/
cooling side is selected, the total current should
be less than 60mA)

________________________________________________________

SETTING AND INDICATION

________________________________________________________
Parameter setting method PXZ: digital setting with eight keys

________________________________________________________
PV/SV display method PXZ-4: PV/SV red LED display, 4 digits

PXZ-5, 7, 9: PV/SV individual LED display,
4 digits each, PV= red, SV=green

________________________________________________________
Status display Control output, alarm output, heater break alarm

output.

Setting accuracy 0.1% FS
________________________________________________________

Indication accuracy Thermocouple: ± 0.5% FS ± 1 digit ± 1°C

(at 23°C) R thermocouple: 0-400°C; ± 1% FS ± 1 digit ± 1°C

B thermocouple: 0-500°C; ± 5% FS ± 1 digit ± 1°C
RTD, voltage, current: ± 0.5% FS ± 1 digit

________________________________________________________

ALARM

________________________________________________________
Alarm output Relay contact (SPST),

220V AC/30V DC, 1A (resistive load)
PXZ-4 type: 1 point
Other types: 2 points

________________________________________________________
Heater break Relay contact (SPST),
alarm output 220V AC/30V DC, 1A (resistive load)

PXZ-4 type: not available

________________________________________________________

STRUCTURE

_______________________________________________________
Mounting method Panel flush mounting or surface mounting

Surface mounting: PXZ-4 type only

_______________________________________________________

External terminal PXZ-4 type: 8-pin or 11-pin socket

Other types: screw terminal (M3.5 screw)

_______________________________________________________
Enclosure Black ABS plastic

_______________________________________________________
Dimensions PXZ-4 48 x 48 x 85.7mm (1/16 DIN)

PXZ-5 52.5 x 100.5 x 95.8mm (1/8 DIN)
PXZ-7 76.5 x 76.5 x 95.8mm (72 mm)
PXZ-9 100.5 x 100.5 x 95.8mm (1/4 DIN)

_______________________________________________________
Weight PXZ-4 approx. 150g

PXZ-5 approx. 300g
PXZ-7 approx. 300g
PXZ-9 approx. 400g

_______________________________________________________

Protective structure Front panel water-proof structure;

NEMA 4X (equivalent to IEC standards IP66)
Rear case: IEC IP20

_______________________________________________________

DELIVERY

_______________________________________________________
PXZ-4 type: controller, panel mounting bracket, socket (when specified),

water proof gasket, 250Ω precision resistor (when required), instruction

manual. Other types: controller, panel mounting bracket, water-proof gasket,

250Ω precision resistor (when required), instruction manual.

_______________________________________________________

4

GENERAL SPECIFICATIONS

_______________________________________________________
Rated voltage 85-264V AC or 24V AC/DC

_______________________________________________________
Power consumption 10VA or less (100V AC)

15VA or less (240V AC)

_______________________________________________________

Insulation resistance 50MΩ or more (500V DC)

_______________________________________________________
Withstand voltage Power source-Earth: 1500V AC, 1 min

Power source-input terminal: 1500V AC, 1 min
Earth-relay output: 1500V AC, 1 min
Earth-Alarm output: 1500V AC, 1 min
Between other terminals: 500V AC, 1 min

_______________________________________________________

Input impedance Thermocouple: 1MΩ or more

Voltage: 450KΩor more
Current: 250Ω (external resistor)

_______________________________________________________

Allowable signal Thermocouple: 100Ω or less
source resistance Voltage: 1KΩ or less

_______________________________________________________

Allowable wiring RTD: 10Ω or less per wire

resistance
_______________________________________________________

Reference junction ± 1 °C (at 23°C)
compensation accuracy

_______________________________________________________
Process variable offset ±10% FS

_______________________________________________________
Setpoint variable offset ± 50% FS

_______________________________________________________
Input filter 0-900.0 sec, setting in 0.1 sec steps

(primary lagging filter)

_______________________________________________________
Noise rejection ratio Normal mode noise (50/60Hz): 50dB or more

Common mode noise (50/60Hz): 140dB or more

_______________________________________________________

POWER FAILURE PROTECTION

_______________________________________________________
Memory protection: Non-volatile memory. Parameter values

remain unchanged with disruption of power.
Ramp/soak function has to be re-initiated.

_______________________________________________________

SELF-CHECK

_______________________________________________________
Method: Watchdog timer monitors program error.

_______________________________________________________

OPERATION AND STORAGE CONDITIONS

_______________________________________________________
Operating temperature -10 to 50°C (14 to 122°F)

_______________________________________________________
Operating humidity 90% RH or less (non-condensing)

_______________________________________________________
Storage temperature -20 to 60°C (-4 to 140°F)

_______________________________________________________
Installation category II

_______________________________________________________
Pollution degree 2

_______________________________________________________

OTHER FUNCTIONS

_______________________________________________________
Parameter mask function Parameter display is disabled by software

_______________________________________________________
Ramp soak function 4-ramp/4-soak

_______________________________________________________

5

PXZ 5,7,9

F

C1

PV

SV

A

B

95.8

DC

C2 H HBL

PXZ-

SEL DATA ENTSV

16.2

18.7

Panel

Gasket

Model

PXZ5
PXZ7
PXZ9

A

52.5

76.5

100.5

B

100.5

76.5

100.5

C

90.5

67

90.5

D

114.5
91

114.5

E

45
68
92

0.6

-0

0.7

-0

0.8

-0

F

92
68
92

0.8

-0

0.7

-0

0.8

-0

G

120Min.

96Min.

120Min.

H

92Min.

116Min.

140Min.

E

F

G

H

Unit: mm
Panel thickness: 1 to 8 mm

Panel cutout size: when installing
“n” numbers of units.

OUTER DIMENSIONS AND PANEL CUTOUT SIZE

PXZ 4

Mounting bracket

Panel cutout size: when installing
“n” numbers of units.

63 or more

63 or more

45 -0

0.5

45 -0

0.5

Unit: mm
Panel thickness: 1 to 8 mm

Gasket

NEMA 4X Integrity

The front side of this instrument conforms to NEMA 4X. To ensure the
waterproofness between the instrument and the panel, use the gasket
that is provided with the unit according to the installation procedure
described below.

How to install the unit

For PXZ-5/7/9, install the two metal brackets, one on the top and the
other on the bottom, and tighten the screws to a torque of about 14.7N­cm (1.5kg-cm). For PXZ4, install the unit in the panel as shown below,
and tighten the screws on the mounting bracket until the unit is secure.
Make sure there is no space between the front side of the unit and the
gasket, and between the gasket and the panel.

Figure 1 Figure 2

Unit

Front Gasket Case

Unit

Panel Panel Mounting bracket Screw

Caution: After the mounting bracket is installed, check the gasket for
displacement and detachment as shown in Figure 3.

INSTALLATION

48

CPVH L

SV

48

F

SEL DATA ENTPV/SV

PXZ-4

Gasket

48

57

Panel

71.5

85.7

7

9.5

57

44.8

Gasket Gasket

Case Case

(Bad) (Good)

Figure 3

6

Wiring Power to Controllers

• Be sure to use the rated power supply voltage and polarity for the
unit to protect it against damage and to prevent the occurrence of
failure.

• Keep the power off until all of the wiring is completed to prevent
electric shock and abnormal operation.

• Keep the power supply wires separated from the input and output
wires.

• Power connections should be made with 18-gauge or larger insulat­ed wire. Stranded wire improves noise immunity. Noise filters and
isolation transformers are recommended in case of noisy power
lines.

• When the Heater Break option is selected, use the same power line
for both the controller and the heater.

Wiring Inputs

There are two input categories available: Thermocouple/RTD or cur­rent/voltage. Make sure you have the right type before wiring the
inputs. Refer to Table of Input Type Codes and set the parameter
“P-n2” accordingly.

Note: In order to minimize the risk of high frequency noise induced by
coils and windings in relays, solenoids, and transformers, use leads
which have braided sheath and ground one end of the sheath. Keep
your input leads separate from power and output leads. If you have
to bring the input signal from a long distance, a signal transmitter
might be needed to maintain an accurate reading; in this case, a unit

WIRING INSTRUCTIONS

Be sure to use the rated power supply voltage and polarity

PXZ4 socket type (with alarm)

1

2

3

4

5

6

7

8

9

10

11 ~

+

–

B
B

A

–

+

Current output, SSR/SSC driving output

Contact output

*Voltage/

current

Alarm output

Thermocouple
input

Power supply

When alarms are provided

(viewing from the back of instrument)

–
+

RTD

* For current input, install the 250Ω precision

resistor (accessory) before using the unit.

that accepts current/voltage input would be necessary.

Thermocouple

• Connect thermocouples directly to the input terminals whenever
possible.

• If using extension wires, make sure they are of the same thermocou­ple material and grade; any dissimilar metal junctions will lead to
erroneous readings.

• Ungrounded thermocouples are recommended for optimal perfor­mance and to prevent ground loops.

• Make sure the polarity is correct.

RTD Pt100

• Use a 3-wire Pt100Ω RTD whenever possible. All three wires must
have low lead resistance (less than 10Ω) and no resistance differen­tials among them.

• If using a 2-wire RTD, jumper the two B-legs with a wire of equal
resistance.

• Make sure A and B leads are connected to the right terminals.

Current/Voltage

• The controller accepts 1-5V, 0-5V, 4-20mA, and 0-20mA DC signals. If
wiring for a voltage input, feed the signal directly to the input termi­nals. For current inputs, first connect the 250Ω precision resistor
that comes with the unit.

• Make sure the polarity is correct.

+

4

3

2

1

(viewing from the back
of instrument)

–

Contact output

5

6

7

~

Power supply

8

PXZ4 socket type (standard)

Current output, SSR/SSC driving output

*Voltage/current

RTD

B

–

B

–

A

+

When no alarms are provided

+

Thermocouple
input

PXZ7

Current output,
SSR/SSC driving output

+

1

Control output 1

3

–

Power supply

PXZ5, PXZ9

*Voltage/

Current input

~

RTD

A

7

7

B

8

8

B

9

–

+

1
2
3

4
5
6

T.C.

7
8
9

10
11
12

Control output 2(on the cooling side)

1012

–

+

Alarm 1
(Upper limit alarm)

13

Alarm 2

14

(Lower limit alarm)

15

Heater break
alarm output

16

Common

17

CT input

18

Current output, SSR/SSC
driving output

250Ω

–

*Voltage/

Current

input

1

Current output
SSR/SSC driving output

+

2

Control output 1

Power supply

T.C.

RTD

A

+

1

B

–

2

B

3

+

5

7

–

~

1
2
3
4
5
6
7
8
9

Current output, SSR/SSC
driving output

10
11
12
13
14
15
16
17
18

+

10

Control output 2
(on the cooling side)

12

–

Alarm 1 (upper limit alarm)
Alarm 2 (lower limit alarm)
Heater break alarm output
Common

CT input

7

Wiring Outputs

Before wiring the outputs, make sure the unit has the right kind of
control output, and that all the load handling devices conform to the
controller specifications. Note that it takes 5 seconds for the outputs
to activate after the power is turned on.
Refer to parameter “P-n1” and to the Table of Output Type Codes to
choose the preferred type of control action– reverse acting or direct
acting. If using two outputs in a heat/cool type control, please refer to
Appendix D for more details.

Relay

• Connecting a load to full capacity of the relay will shorten the relay
life, especially if it is operated at a rapid rate. To protect the output
relay, an external relay or a contactor
should be used. If a higher current rating
is required, a solid-state relay driver type
output is recommended.

• Connect the load between the normally
opened contacts of the relay.This way, if
power to the controller is disrupted, the
output circuit would open, preventing the
load from running out of control.

• Set the proportional time cycle parameter, “TC” to 30 secs. or more.

• Use of “Z-trap” (manufacturer: Fuji Electric Co.) is recommended to
protect the relay against switching surges and to ensure the prod­uct’s long life. Connect it between the contacts of the relay as
shown in the example.

Part No.:
ENC241D-05A

(power supply voltage: 100V)

ENC471D-05A (power supply voltage: 200V)

SSR/SSC Driver (Pulsed DC Voltage)

• The non-isolated DC output is used to drive an external load-han­dling device such as Solid-State Relay(SSR) or Solid-State
Contactor(SSC).

• The total current drawn, for both single and dual outputs, should be
within the allowed value.

• Make sure the polarity is correct.

• Set the proportional time cycle parameter, “TC” to 1 sec. or more.

4 to 20mA DC

• The output is a non-isolated analog signal used to drive a variety of
output devices such as SCRs and valve actuators.

• The load resistance must be less than 600Ω.

• Make sure the polarity is correct.

• The proportional time cycle parameter, “TC” is set to 0, and is not
displayed on the programming menu.

Wiring Alarms

• Make sure the load does not exceed the rated capacity of the relay.

• Several types of alarm configurations can be programmed and does
not require a change in the wiring. Refer to parameters AL, AH, P-
AH, P-AL, P-An.

• For details on Heater Break alarm, please refer to Appendix D and
the Heater Break Alarm Setpoint parameter “Hb” in the program­ming section.

6543

5
6
7
8
9

PXZ4
(8-pin)

PXZ9

System Wiring Diagram

Example:

L

120V AC

N

PXZ4-RAY1-4V

Fuse

Heater (3A or less)

3

–

2

+

Thermocouple

Input

Contact

Output

4

5

8

1

Fuse

6

7

Power

85 to 264 VAC

50/60Hz