Omron G3PX-220EH-CT03, G3PX-220EUN, G3PX-220EH-CT10, G3PX-240EH-CT03, G3PX-240EH-CT10 User Manual

Power Controllers G3PX 67

Power Controllers

G3PX

• Refer to Warranty and Application Considerations (page 1), Safety

Precautions (page 4), and Technical and Safety Information (page 6).

• Refer to Heater Control Types and G3PX Control Methods (page 23).

■Single-phase Models

EUN Series

AC Power Controllers with Phase-control
System Allow Precise Temperature Control
Models with Base-up and Soft-start
Functions

EH Series

Phase Control System Makes It Possible to
Detect Single Heater Op en Circuit (EH
Series) and Multiple Heater Open Circuits
(EHN Series)

EC Series

Optimum Devices for Controlling Input
Power for Pure Metal Heater, and
Incorporating Overcurrent Detecting and
Single Heater Open Circuit Detecting
Functions

• OMR ON’s un ique design and carefu lly-selected materials m ade
it possible to produce a compact and lightweight Power
Controller.

• Replaceable, easy-to-install Power Device Cartridge assures
ease of maintenance.

• Detecting component failures and operating errors.

• Certified by UL and CSA.

Model Number Structure

■Model Number Legend

1. Basic Model Name

G3PX: Power Controller

2. Rated Load Power Supply Voltage

2: 100/110 VAC and 200/230 VAC

3. Rated Load Current

20: 20 A
40: 40 A
60: 60 A

4. Number of Phases

E: Single

5. Functions

UN: Simple models
H: Single heater open circuit detection function
HN: Multiple heater open circuit detection function
C: Constant-current function

6. CT Unit Type
Note: Refer to CT Unit on page 70.

1

2 3 4 5 6

G3PX-@@@@-@

68 Power Controllers G3PX

G3PX Cartridge

1. Basic Model Type

G32X: Accessory for G3PX

2. Basic Model Name

A: Power Devi ce Cartridge

3. Rated Load Current

20: 20 A
40: 40 A
60: 60 A

CT Unit

1. Basic Model Type

G32X: Accessory for G3PX

2. Basic Model Name

CT: CT Unit

3. Length of Lead Wires

03: 30 cm
10: 100 cm

4. Series

Blank: Series for single heater open circuit detection
HN: Series for multiple heater open circuit detection
C: Series for constant current

Variable Resistor

1. Basic Model Type

G32X: Accessory for G3PX

2. Basic Model Name

V3K: 3-k

Ω Variable Resistor

V2K: 2-k

Ω Variable Resistor

12

3

G32X-@@

1

2

3

4

G32X-@@@

1

2

G32X-@

Power Controllers G3PX 69

Ordering Information

■List of Models

EUN Series

Note: 1. The base-up output with a 0-mA temperature controller output (i.e. the temperature controller is OFF) differs from that with a 4-mA

temperature controller output. Refer the Characteristics data on page 73.

2. When ordering, make sure that the rated voltage is 200/230 VAC. F or a rated v oltage of 200/220 VAC, the G3PX is available.

EH Series

Note: 1. EH- and EHN-series models are provided with a CT incorporating 30- or 100-cm-long lead wires and Power Device Cartridge. When

ordering, specify the length of the lead wires by adding a code to the model number as shown below.
G3PX-2@0EH-CT03: CT with 30-cm-long lead wires
G3PX-2@0EH-CT10: CT with 100-cm-long lead wires

2. Adjusts the multiple heater open circuit detection sensitivity of EHN-series models. Enables single heater open circuit detection in control
of a maximum of five heaters.

3. When ordering, make sure that the rated voltage is 200/230 VAC. F or a rated v oltage of 200/220 VAC, the G3PX is available.

EC Series

Note: 1. EC-series models are provided with a CT Unit with lead wires (30- or 100- cm in length). When ordering, specify the length of the lead

wires by adding a code to the model number as shown below.
G3PX-2@0EC-CT03: CT with 30-cm-long lead wires
G3PX-2@0EC-CT10: CT with 100-cm-long lead wires

2. When ordering, make sure that the rated voltage is 200/230 VAC. F or a rated v oltage of 200/220 VAC, the G3PX is available.

Phase Applicable load Level indicator Base-up function

(See note 1.)

Soft-start time Carry

current

Rated voltage Model

Single Resistive load

Heater

Yes Yes Approx. 0.5 to 10 s 20 A 100/110 VAC

200/230 VAC
(See note 2.)

G3PX-220EUN
40 A G3PX-240EUN
60 A G3PX-260EUN

Phase Applicable load Level indicator Single heater

open circuit

detection

Multiple heater

open circuit

detection

Carry

current

Rated voltage Model

(See note 1.)

Single Resistive load

Heater

Yes Yes No 20 A 100/110 VAC

200/230 VAC
(See note 3.)

G3PX-220EH-CT03
G3PX-220EH-CT10

40 A G3PX-240EH-CT03

G3PX-240EH-CT10

60 A G3PX-260EH-CT03

G3PX-260EH-CT10

Yes (See note 2.) Yes 20 A G3PX-220EHN-CT03

G3PX-220EHN-CT10

40 A G3PX-240EHN-CT03

G3PX-240EHN-CT10

60 A G3PX-260EHN-CT03

G3PX-260EHN-CT10

Phase Applicable

load

Level indicator Constant-current

function

Single heater

open circuit

detection

Carry

current

Rated voltage Model

(See note 1.)

Single Resistive load

Heater

Yes Yes Yes 20 A 100/110 VAC

200/230 VAC
(See note 2.)

G3PX-220EC-CT03
G3PX-220EC-CT10

40 A G3PX-240EC-CT03

G3PX-240EC-CT10

60 A G3PX-260EC-CT03

G3PX-260EC-CT10

70 Power Controllers G3PX

■Accessories (Order Separately)

CT Unit

Power Device Cartridge

Note: The G32X-A is a dedicated Power Device Cartridge for the G3PX.

Refer to Replacement Parts on page 81.

Specifications

■Ratings (at an Ambie nt Temperature of 25°C)

Control

Note: 1. 50/60 Hz (no selector required) (EUN Series)

Terminals 18 and 19 of EHN/EC-series models must be open when the supply frequency is 50 Hz. These terminals must be short­circuited when the supply frequency is 60 Hz.

2. Use the G32X-V2K 2-k

Ω Variable Resistor for external main setting on EUN, EC, and EHN (G32X-V3K 3-kΩ for EN-series models).

3. Input 4 to 20 mA or 1 to 5 VDC linear input to the 4 to 20 mA current input terminal.

Output

Name Length of lead wires Solderless terminals Applicable models Model

CT Unit 30 cm Yes G3PX-2@@EH G32X-CT03

100 cm G32X-CT10
30 cm G3PX-2@@EHN G32X-CT03HN
100 cm G32X-CT10HN
30 cm G3PX-2@@EC G32X-CT03C
100 cm G32X-CT10C

Name Carry current Applicable models Model

Power De vice Cartridge 20 A G3PX-220E@@ G32X-A20

40 A G3PX-240E@@ G32X-A40
60 A G3PX-260E@@ G32X-A60

Item G3PX-

220EUN/
240EUN/

260EUN

G3PX­220EH/
240EH/

260EH

G3PX­220EHN/
240EHN/

260EHN

G3PX­220EC/
240EC/

260EC

Rated voltage 100/110, 200/230 V AC
Frequency 50/60 Hz (See note 1.)
Input

signal for
control

External main
setting
(See note 2.)

2 k

Ω (type B, 2 W min.) 3 kΩ (type B, 2 W min.) 2 kΩ (type B, 2 W min.)

Current input 4 to 20 mA (at 1 to 5 VDC) (Input impedance: 250

Ω) (See note 3.)

Voltage ON/
OFF input

5 to 24 VDC (Input impedance: approx. 20 k

Ω)

External duty
setting

3 k

Ω (type B)

Relay output for alarm --- SPDT: 8 A at 250 VAC/30 VDC

Model Applicable load

Rated load voltage Load current Inrush current Number of phases

G3PX-220E@
G3PX-220E@N

100/110, 200/230 VAC (50/
60 Hz)

1 to 20 A (See note.) 220 A (60 Hz, 1 cycle) Single

G3PX-240E@
G3PX-240E@N

1 to 40 A (See note.) 440 A (60 Hz, 1 cycle)

G3PX-260E@
G3PX-260E@N

1 to 60 A (See note.) 440 A (60 Hz, 1 cycle)

Power Controllers G3PX 71

Note: The G3PX-2@@EHN (model with multiple heater open circuit detecting function) and G3PX-2@@EC (constant-current model) require 20%

min. of the rated current to detect a short mode failure. EC-series models detect an open mode failure if the load current has dropped to
80% of the rated value. A short mode failure will be detected if the current has risen to 20% of the rated value.

■Characteristics

EU/EH Series

Note: 1. Duty setting does not complete to the OFF state (i.e. 10% remains).

2. The start-up time is factory-set to 1 s on the EH Series, approx. 0.5 s on the EHN and EC Series.

3. This is the initial start-up time with a 100% duty setting.

4. Detection is effective when the set current is reduced by 20% or more.

5. The minimum set value in the G3PX-220EHN is 6 A. If a lower value is required, increase the number of wiring turns around the CT.

Item G3PX-220EUN/

240EUN/260EUN

G3PX-220EH/240EH/260EH G3PX-220EHN/

240EHN/260EHN

Operating voltage range

±10%

Operating frequency
range

±1 Hz

Output voltage adjustable
range

0% to 95%

Internal duty setting
range

0% to 100% 10% to 100% (See note 1.) 0% to 100%

External duty setting
range

0% to 100% 10% to 100% (See note 1.) 0% to 100%

Start-up time
(See note 2.)

Approx. 0.5 to 10 s
(See note 3.)

Approx. 0.1 to 1 s
(See note 3.)

Approx. 0.5 to 10 s
(See note 3.)

Base-up range 0% to 90% ---
Multiple heater open cir-

cuit detection

--- 20% max. (See note 4.)

Min. phase detection --- Approx. 1/6

π

Min. phase setting --- --- Approx. 1/6 π
Min. load current for ON

error detecting

--- 1 A 30% max. of rated current
(See note 5.)

Abnormality detection
time

--- 0.1 s max. 1 s max.

Voltage drop with output ON1.6 V max. (RMS)

Leakage current 10 mA max. at 100/110 VAC, 20 mA max. at 200/230 VAC
Insulation resistance 100 M

Ω min. (at 500 VDC)

Dielectric strength 2,000 VA C, 50/60 Hz for 1 min.
Vibration resistance

Malfunction: 10 to 55 to 10 Hz, 100 m/s

2

Shock resistance

Malfunction: 300 m/s

2

Ambient temperature Operating: –25°C to 65°C (with no icing or condensation)

Storage: –10

°C to 55°C (with no icing or condensation)

Ambient humidity Operating: 45% to 85%
Weight G3PX-220EUN: approx. 1.1 kg

G3PX-240EUN: approx. 1.4 kg
G3PX-260EUN: approx. 1.7 kg

G3PX-220EH: approx. 1.1 kg
G3PX-240EH: approx. 1.4 kg
G3PX-260EH: approx. 1.7 kg

G3PX-220EHN: approx. 1.2 kg
G3PX-240EHN: approx. 1.5 kg
G3PX-260EHN: approx. 1.8 kg

72 Power Controllers G3PX

EC Series

Item G3PX-220EC G3PX-240EC G3PX-260EC

Operating voltage range

±10%

Operating frequency range

±1 Hz

Output voltage adjustable range 0% to 95%
Internal duty setting range 0% to 100%
External duty setting range 0% to 100%
Start-up time Approx. 0.5 to 10 s
Min. load current for ON error

detecting

20% max. of rated current

Current limit range 0% to 100%
Excess current detection Peak current of 110 A within

1cycle

Peak current of 220 A within
1cycle

Peak current of 330 A within
1 cycle

Constant current

±3% max. with 10-time increment of load value
±3% max. with ±10% change of voltage

Abnormality detection time 1 s max.
Voltage drop with output ON 1.6 V max. (RMS)
Leakage current 10 mA max. at 100/110 VAC, 20 mA max. at 200/230 VAC
Insulation resistance 100 M

Ω min. (at 500 VDC)

Dielectric strength 2,000 VAC, 50/60 Hz for 1 min.
Vibration resistance

Malfunction: 10 to 55 to 10 Hz, 100 m/s

2

Shock resistance

Malfunction: 300 m/s

2

Ambient temperature Operating: –25°C to 65°C (with no icing or condensation)

Storage: –10

°C to 55°C (with no icing or condensation)

Ambient humidity Operating: 45% to 85%
Weight G3PX-220EC: approx. 1.1 kg

G3PX-240EC: approx. 1.4 kg
G3PX-260EC: approx. 1.7 kg

Power Controllers G3PX 73

Engineering Data

The following data is for an ambient temperature of 25°C.

Output Characteristics Duty Setting

Base-up Characteristics

Load Current vs. Ambient Temperature

100%

60%

40%

20%

G3PX-EUN/EH/EHN Models

Output voltage (%)

Input current (mA

)

G3PX-EC Models G3PX-EUN/EH/EHN Models

Output voltage (%)

Input current (mA

)

100%

60%

40%

20%

Output voltage (%)

Input current (mA

)

G3PX-2@0EUN Models

Output voltage (%)

Input current (mA

)

Load current (A)

G3PX-220E@ Models

Ambient temperature (°C)

G3PX-240E@ Models G3PX-260E@ Models

Ambient temperature (°C) Ambient temperature (°C)

Load current (A)

Load current (A)

74 Power Controllers G3PX

One Cycle Surge Current: Non-repetitive

Inrush current (A.Peak)

Inrush current (A.Peak)

Inrush current (A.Peak)

G3PX-220E@ Models

Energized time (ms)

G3PX-240E@ Models G3PX-260E@ Models

Energized time (ms) Energized time (ms)

Note: The above are possible on condition that the G3PX is in non-repetitive operation. If the G3PX is in repetitive operation,

reduce the applied current to half.

Power Controllers G3PX 75

Nomenclature

G3PX-2@0EUN

POWER indicator

BASE-UP adjuster

Level indicator

G3PX-2@0EH-CT@@

Level indicator

POWER indicator

CT Unit

G3PX-2@0EHN-CT@@

POWER indicator

Level indicator

RESET switch

G3PX-2@0EC-CT@@

POWER indicator

CT Unit

Level indicator

Single-function Model
(EUN-series Model)

Multiple Heater Open Circuit
Detection (EHN-series Model)

TIME adjuster
(for Extended
soft-start time)

DUTY adjuster
(for internal
slope setting)

Power Device
Cartridge

RUN/SET switch for setting condition for
multiple heater open circuit detection.

SHORT indicator
(for short-mode
failure detection)

Power Device
Cartridge

TIME adjuster
(for extended soft­start time)

DUTY adjuster
(for internal slope
setting)

ALARM adjuster
(for multiple heater
open circuit detection)

OPEN indicator
(for multiple heater
open circuit detection)

Single Heater Open Circuit
Detection (EH-series Model)

SHORT indicator
(for short-mode
failure detection)

CT Unit

OPEN indicator
(for single heater
open circuit
detection)

DUTY adjuster
(for internal
slope setting)

TIME adjuster
(for soft-start
time)

Reset
switch

Power
Device
Cartridge

Constant-current Model
(EC-series Model)

SHORT indicator
(for short-mode
failure detection)

OPEN indicator (for single
heater open circuit
detection)

CURRENT limit adjuster
(for limiting current)

DUTY adjuster
(for internal slope
setting)

TIME adjuster
(for extended
soft-start time)

RESET
switch

Power
Device
Cartridge

76 Power Controllers G3PX

Operation

■Error Detecting Fu nction

Wiring

Single-phase Models

All G3PX-2@0EH/EHN/EC-series models incorporate terminals 11
and 12 for the CT Unit, 13 and 14 for the external reset switch, and
16 and 17 for relay output as well as power/input terminals 1 through

10.

Output

Single-phase Models

The following illustrations show the condition of the G3PX LED
indicators when the G3PX detects heater open circuit, a short-mode
failure (ON failure of components), or overcurrent (EC-series
constant-current models only). The indicator and relay output signals
are reset with the internal or external reset switch provided that the
error condition has been remedied.

1. When EH/EHN/EC-series models detect single or multiple heater
open circuit, the OPEN indicator is lit and the SPDT relay output
is ON.

Note: When the G3PX detects heater open circuit, the Level indicator

will be OFF regardless of the G3PX input condition. The red
OPEN indicator will be lit. EHN-series models, however, will
continue operating with level indication.

2. When EH/EHN/EC-series models detect a short-mode failure, the
SHORT indicator is lit and the SPDT relay output is ON.

Note: When the G3PX detects a short-mode failure, all LEDs of the

Level indicator and red SHOR T i ndicator are lit. When y ou use
a breaker to disconnect the load with the relay output, all LEDs
of the Level indicator will be OFF regardless of the input to the
G3PX.

3. When EC-series models detect an overcurrent, the Level
indicator will flash and the SPDT relay output is ON. The input
signal will be shut off.

Note: When resetting, leave power supply terminals 10 to 9 or 8 ON.

11

12

13

14

15

16

17

G3PX-2@0EH

CT Unit
G32X-CT@@

3. For more than one heater.

Load 1

Load 2

CT Unit

Relay output
(SPDT)

Load

(see note 1)

(see note 2)

(see note 3)

External reset
switch

Note: 1. Connect either the black or white lead wire of the CT

Unit to terminal 11 and the other lead wire to terminal

12. The G3PX will malfunction if you do not connect
the CT Unit to the G3PX.

2. The rated current and voltage of G3PX models when
reset are as follows:

EH-series models: 12 mA at 12 VDC

EHN- and EC-series models: 1 mA at 12 VDC

Load

With continuous load current.

With load current shut off.

Power Controllers G3PX 77

■Wiring

Main Circuit

Single-phase Models

The following illustrations show connection examples:

Setting Circuit

Analog Control

Single-phase Models

1. A Temperature Controller with an output of 4 to 20 mA is used to control the G3PX.

2. A Temperature Controller with an output of 4 to 20 mA is used with the G3PX to change the duty.

G3PX

1
2
3
4
5
6
7
8
9

10

Note: Use a single power supply for the G3PX and the load.

Load 1

Load 2

Load

200/230 VAC
100/110 VAC

1
2
3
4
5
6
7
8
9

10

G3PX

(250

Ω*)

4

5

G3PX

4
5

(250 Ω*)

G3PX

(600 Ω*)

+

−

+

−

Load 1

Load 2

4 to 20 mA

4 to 20 mA

*Impedance

Note: Two G3PX models can be connected in series to OMRON's single Temperature

Controller (with an internal impedance of 600 Ω) with a current output.

E5@K
Temperature
Controller

Temperature
Controller

+

−

G3PX

1
2
3
4
5
6
7
8
9

10

3
2
1

Load 1

Load 2

4 to 20 mA

DUTY

Note: You can change the duty with the external or internal ramp adjuster.

Internal DUTY
adjuster

E5@K
Temperature
Controller

G32X-V3K External Variable
Resistor (3 kΩ) for duty setting

78 Power Controllers G3PX

ON/OFF Control

Single-phase Models

1. A Temperature Controller is used to change the duty of G3PX.

2. A Temperature Controller (with a voltage output) is used to control several G3PXs.

Connection Example

3. A Temperature Controller (with a relay output) is used to vary the duty of G3PX.

Temperature Controller specifications No. of G3PX

E5@K: 40 mA at 12 V 20 sets
E5@N: 20 mA at 12 V 20 sets
20 mA at 5 V 20 sets
10 mA at 5 V 20 sets

1
2
3
4
5
6
7
8
9

10

3
2
1

G3PX

+

−

Load 1

Load 2

DUTY

Note: You can change the duty with the external or internal variable resistor.

Internal DUTY
adjuster

5/12/24 VDC
ON/OFF

E5@N
Temperature
Controller

G32X-V3K External
DUTY Adjuster (3 kΩ)

−+

3
5

G3PX

3
5

G3PX

3
5

G3PX

Temperature
controller

3
2
1

Load 1

Load 2

G3PX

1
2
3
4
5
6
7
8
9

10

DUTY

Temperature
controller

Internal DUTY
adjuster

G32X-V3K External
DUTY Adjuster (3 kΩ)

Power Controllers G3PX 79

Manual Control

Single-phase Models

Two-position Control

Single-phase Models

■Setting of Base-up Output (G3PX-2@0EUN Series)

The base-up output can be adjusted with the base-up adjuster knob. It is also possible to control the base-up output for the full scale of 4 to
20-mA input current by adjusting the duty adjuster. Refer to Engineering Data on page 73 for the base-up characteristics.

■G3PX-2@0EHN Series (Multiple Heater Open Circuit Detection Model)

Setting

1. Use the G32X-CT@@HN CT Unit and make sure that the G3PX is

wired correctly.

2. The G3PX initially set is shown in the following illustration.
Make sure that the RUN/SET switch has been set to SET.
Make sure that the DUTY adjuster has been turned clockwise to
the maximum.

3. Adjust the sensitivity.
T urn the ALARM adjuster and set to the position where the OPEN
indicator is lit. Stop turning the ALARM adjuster as soon as the
indicator is lit to complete the setting.

3
2
1

G3PX

1
2
3
4
5
6
7
8
9

10

3
2
1

Load 1

Load 2

DUTY

G32X-V3K or G32X-V2K
External DUTY Adjuster

G32X-V3K External DUTY
Adjuster (3 kΩ) for duty
setting

Internal DUTY
adjuster

Note: Delicate duty adjustment is possible with the external or

internal resistor. Use a right DUTY adjuster (2- or 3-kΩ
type) according to the G3PX model as follows:
G32K-V3K (3 kΩ) for EH-series models
G32X-V2K (2 kΩ) for EUN-, EHN-, and EC-series models

G3PX

1
2
3
4
5
6
7
8
9

10

RY

Load 1

Load 2

H (High)

L (Low)

G32X-V3K or G32X-V2K
External DUTY Adjuster

Note: 1. A temperature controller with relay output or a single relay can be used with the G3PX

in two-position (high-and low-position) control, in which case the relay contact current is
30 mA at 12 VDC with the External DUTY Adjuster set to 0 Ω.

2. Use a right DUTY adjuster (2- or 3-kΩ type) according to the G3PX model as follows:
G32X-V3K (3 kW) for EH-series models
G32X-V21K (2 kW) for EUN-, EHN-, and EC-series models.

80 Power Controllers G3PX

4. Set the RUN/SET switch to RUN.

When all settings have been finished, the OPEN indicator is OFF.

Note: 1. The G3PX can control any part of the phase as long as the

controlled phase is approximately 1/6

π or more in width.

2. Be sure to prepare terminals 18 and 19 corresponding to the
supply frequency of 50 Hz or 60 Hz. Otherwise, a setting
error will result in a malfunction regardless of the RUN/SET
switch setting.
When the error has occurred, turn the ALARM adjuster
counterclockwise to the minimum setting, reset the G3PX,
and readjust.

Power Controllers G3PX 81

■Replacement Parts

G32X-A Power Device Cartridge

The temperature indicator will be lit in red if the power element is damaged. If the power element is damaged due to ov ercurrent or other reasons,
the power element and its peripheral parts can be replaced.
The power element and its peripheral parts can be replaced without disconnecting the wires of the G3PX.
Improve the heat radiation of the G3PX before replacing the Cartridge.
The temperature indicator will not be lit in red if the G3PX has overcurrent due to load short-circuiting or other reasons over a short time.

Appearance

Replacement of G32X-A20 Power
Device Cartridge

Use the special tool (provided) to extract the Cartridge for
replacement with a new one.

Extraction

Follow the procedures below to dismount the Power Device
Cartridge from the G3PX.

1. Switch off the power.

2. Remove the terminal cover.

3. Hook the tool on the indented portions of the Power Device

Cartridge as shown in the illustration below and pull up the Power
Device Cartridge vertically.

Mounting

The procedures for mounting the Power Device Cartridge are as
follows:

1. Apply silicone grease (provided with the G32X-A) to the entire
surface of the heat sink.

2. Make sure there is no dust or pieces of wire on the heat sinks of
the G32X-A or the G3PX.

3. Insert the Cartr idge into the opening of the G3PX so that the
letters on the Cartridge and those on the G3PX are in the same
direction and sides A and B are even.

4. Attach the terminal cover.

5. Switch on the power and check the G3PX to be sure it works

properly.

G32X-A40/60

The G32X-A40 and G32X-A60 are secured with screws.

Extraction

The procedures for dismounting the Power Device Cartridge are as
follows:

1. Switch off the G3PX.

2. Remove the terminal cover.

3. Be sure to turn off the G3PX and loosen the screws located in the

upper center and lower center. These screws are connected to
terminals 1 and 2.

G32X-A20 G32X-A40 G32X-A60

Special tool

Terminal cover

Indented
portions

A

B

Loosen

Loosen

82 Power Controllers G3PX

4. Loosen the screws on both corners.

5. Hold the indented part of both corners to dismount the Cartridge.

Mounting

1. Apply silicone grease (provided with the G32X-A) to the entire

surface of the heat sink.

2. Make sure there is no dust or pieces of wire on the heat sinks of
the G32X-A or the G3PX.

3. Insert the Cartridge into the opening of the G3PX so that the
letters on the Cartridge and those on the G3PX are in the same
direction and sides A and B are even.

4. Tighten the screws on both corners with a tightening torque of

0.59 to 0.78 N·m.

5. Tighten the center screws of the G3PX with a tightening torque of

0.59 to 0.78 N·m.

6. Attach the terminal cover.

7. Switch on the power and check the G3PX to be sure it works

properly.

■External Variab le Resistor

The G32X-V3K and G32X-V2K are provided with a set consisting of
adjuster, knob, and nameplate.

Note: 1. The G32X-V3K is equivalent to the conventional G32X-VR.

2. Resistive Value

Loosen

Loosen

A

B

Resistive value

(See note 1.)

Model

3 k

Ω G32X-V3K (See note 2.)

2 k

Ω G32X-V2K

The resistance is
read on the back of
the variable resistor.

2.5±1

10±1

20±1

1.6±0.2

1±0.1

M9P0.75

12±0.2

1

7

14

6.5

1.6

13.4

26

34

12±0.2

G32X-VR

100

%

48

48

External DUTY Adjuster Knob

Mounting Holes Nameplate

31±1 dia.

15 min.

17 max.

R26 max.

2.8±0.2 dia.

12±0.2

30 max.

6 dia.

0

−0.1

3 dia. hole

9.5 dia. hole

Filled with
white resin

Power Controllers G3PX 83

Dimensions

Note: All units are in millimeters unless otherwise indicated.

■Single-phase Models

140±0.3

65±0.3

119

108

120

109.8

8.6

8.6

140±0.2

50±0.2

130

119

108

120

13

13

109.8

140±0.2

65±0.2

130

140±0.3

50±0.3

7.6

7.6

G3PX-220E@ Series

G3PX-240E@ Series

Mounting Holes

Two, M4 screws

70 max.

130 max.

150 max.

130 max.

65±0.2

85 max.

Two, M5 screws

150 max.

Mounting Holes

Four, 4.5 dia.
or M4 holes

Two, 4.6 dia.
holes

Two, R2.3
holes

Four, 4.5 dia.
or M4 holes

Two, 4.6 dia.
holes

Two, R2.3
holes

84 Power Controllers G3PX

140±0.3

80±0.3

114

108

120

17

17

140±0.2

130

109.8

80±0.2

7.6

G3PX-260E@ Series

Mounting Holes

130 max.

150 max.

Two, M6 screws

100 max.

Two, 4.6 dia.
holes

Two,
R2.3
holes

Four 4.5-dia.
or M4 holes

50

±0.2

50

30

9.5

24

35

14

55

40

17

G32X-CT03@ Series
G32X-CT10@ Series

Mounting Holes

Two 4.5-dia. or M4 holes

60 max.

(see note 2)

17 dia. hole
(15 dia., see
note 1)

Note: 1. Color of the hole

EH Series: Black
EHN Series: White
EC Series: Light gray
The size of the hole of CT Units for EC- and EHN-series models is 15 dia.

2. The G32X-CT03@ incorporates 30-cm solderless terminals and the G32X-CT10@
incorporates 100-cm solderless terminals.

Power Controllers G3PX 85

Installation

■Terminal Arrangement

Single-phase Models

Note: Open the terminals for 50 Hz or short-circuit the terminals for 60 Hz. When the product is shipped, the terminals are short-circuited using a

short-circuiting bar to set to 60 Hz. When using at 50 Hz, remove the short-circuiting bar.

G3PX-220EUN
G3PX-240EUN
G3PX-260EUN

G3PX-220EH
G3PX-240EH
G3PX-260EH

1

2

3

4

5

6

7

8

9

10

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

W

B

(1 to 5 VDC)
(Voltage)

5 to 24 VDC
INPUT

SOURCE

(1 to 5 VDC)
(VOLTAGE)

5 to 24 VDC
INPUT

SOURCE

RESET

CT UNIT
G32X-CT

ALARM

External main setting
3 kΩB 2 W
MAN SET

Voltage ON/OFF input
VOLTAGE IN

Current input
4 to 20 mA DC CURRENT

External duty setting
3 kΩB
MAN DUTY SET

200/230 VAC
50/60 Hz

100/110 VAC
50/60 Hz

2 kΩB, 2 W for
EUN-series models

Internal contact
configuration

External main setting
3 kΩB 2 W
MAN SET

Voltage ON/OFF input
VOLTAGE IN

Current input 4 to 20 mA
DC CURRENT

External duty setting 3 kΩB
MAN DUTY SET

200/230 VAC
50/60 Hz

100/110 VAC
50/60 Hz

G3PX-220EHN/220EC
G3PX-240EHN/240EC
G3PX-260EHN/260EC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

W

B

18

19

(1 to 5 VDC)
(VOLTAGE)

5 to 24 VDC
INPUT

SOURCE

RESET

CT UNIT
G32X-CT

ALARM

Internal
contact
configuration

OPEN 50 Hz
SHORT 60 Hz
(see note)

External main setting
2 kΩB 2 W
MAN SET

Voltage ON/OFF input
VOLTAGE IN

Current input 4 to 20 mA
DC CURRENT

External duty setting
3 kΩB
MAN DUTY SET

200/230 VAC
50/60 Hz

100/110 VAC
50/60 Hz

86 Power Controllers G3PX

Safety Precautions

■Precautions for Correct Use

Please observe the following precautions to prevent failure to
operate, malfunction, or undesirable effect on product performance.

Load

Only resistive loads can be connected to the G3PX. Contact your
OMRON representatives if it is necessary to connect inductive or
transformer loads.

Mounting

Pay utmost attent ion when mounting the G3PX so that the G3PX will
not fall thus resulting in injury.

Wiring

Make sure that the lead wires are thick enough according to the
current.

Be sure to turn off power to the G3PX when wiring. The G3PX has
current leakage although the G3PX is turned off if the power supply
is connected to the G3PX, which may give an electric shock.

Do not wire power lines or high-tension lines along with the lines of
the G3PX in the same conduit, otherwise the G3PX may be
damaged or malfunction due to induction. Be sure to wire the lines of
the G3PX separated from power lines or high-tension lines or laid in
an exclusive, shielded conduit.

Tightening Torque

Apply the following tightening torque.
Output terminal:
20-A model: 1.47 N·m
40-A model: 2.45 N·m
60-A model: 4.12 N·m
Terminal block:
Single-phase model: 0.98 N·m
Be sure to protect the terminals with the protective cover after wiring.

Wiring for Error Detection

If a contactor is employed and operated with the relay output signal
of the G3PX for error detection, make sure that the G3PX is closer to
the power supply than the contactor.

Instruments

The instruments are used for displaying root-mean-square voltage
and current values of the AC circuitry.

Operation Monitoring

The level indicator just indicates the phase of the load and it is not
highly precise.

Ramp Setting

There is a decrease in ramp if the internal DUTY adjuster is turned
counterclockwise.

If the External DUTY Adjuster is used, set the Internal DUTY
Adjuster to 100%.

Vertical Mounting

Horizontal Mounting

Note: In the case of flat mounting, the 30%

derating of the load current is required.

10 mm10 mm

50 mm

10 mm 10 mm

Close Mounting Example (Single-phase Models)

Note: Make sure that there is a space of at least 50 mm

vertically and at least 10 mm horizontally between
adjacent single-phase models.

Instrument Remarks

Thermal type Available
Digital type displaying root-mean-square

values
Moving-iron type
Rectifier type Not available (not precise

enough)

Multimeter
Digital multimeter

100% 10%

DUTY DUTY

Power Controllers G3PX 87

CT Unit

The CT Unit varies with the G3PX-series model. Use the following
CT Units in combination with the G3PX models.

G3PX-2@0EH Series: G32X-CT@@
G3PX-2@0EHN Series: G32X-CT@@HN
G3PX-2@0EC Series: G32X-CT@@C

If any of the following models is used and the actual load current is
50% of the maximum rated load current or lower, increase the
number of turns of the wire around the CT Unit.
G3PX-20EHN Series (multi-heater open circuit detective models)
G3PX-20EC Series (constant current)

For example, make two turns if the actual load current is 50% of the
maximum rated load current and four turns if the actual load current
is 25% of the maximum rated load current.

If the G3PX is a constant current model, do not increase the number
of turns of the wire around the CT Unit excessively, otherwise the
overcurrent detective function may operate by mistake.

External DUTY Adjuster

Use the External DUTY Adjuster with a resistance of 2 kΩ or that
with a resistance of 3 k

Ω according to the G3PX-series model in use.

Refer to the following combinations.
G3PX-2@EH Series: G32X-V3K (3 k

Ω)

G3PX-2@0EUN Series
G3PX-2@0EC Series

Base-up Function

If the model in use has the model number suffix “EUN,” the base-up
function is available.

The base-up output of the G3PX with a temperature controller output
of 0 mA (i.e., the temperature controller is turned off) and that of the
G3PX with a temperature controller output of 4 mA are different from
each other.

Power Device Cartridge

Do not apply power to the G3PX with the Power Device Cartridge
dismounted.

Heater Open Circuit Detection

EH and EHN Models

The heater open circuit detective function is not available for detect­ing the phase less than the following.

Power Supply

Single-phase Mode ls Only

Do not apply 200 V to the 100-V terminals, otherwise the thermal
fuse of the built-in transformer will be blown and the G3PX will not
operate.

Others

It is not possible to use three single-phase models for three-phase
load control.

If three-phase power supply is used for single-phase models
operating in parallel, make sure that the two phases supplied to all
the single-phase models are the same.

Troubleshooting

Check the following if the G3PX does not operate or has difficulty in
temperature control.

• The load does not turn on with 100% input.
Check the default internal ramp setting.

Also check the current limit adjuster if the G3PX is a constant DC
model.

• The G3PX does not operate or is in abnormal operation.
Make sure that all input terminals are connected properly with no

mistakes in polarity.
Make sure that the internal DUTY adjuster is not set to the farthest

clockwise position.
Make sure that the frequency used by the G3PX (i.e., 50 or 60 Hz)

is set properly. (This applies to the EC, and EHN models.)

• The G3PX malfunctions if the external adjusters are turned.
Make sure that the numbers on the external adjusters coincide with

the corresponding terminal numbers on the G3PX.
Make sure that the 2-k

Ω and 3-kΩ DUTY adjusters are connected

correctly.

• Temperature control with a Voltage-output Temperature Controller

is not smooth.

Make sure that the controlled soft-start up/down time has been
adjusted properly. If not, turn the TIME adjuster counterclockwise
to the minimum setting to reduce the controlled start-up/down time.

G3PX-20EH Series: π/8 or less
G3PX-20EHN Series: Approx. π/6 or less

Phase not detectable

DUTY

Make sure that the adjuster
is set to the farthest
clockwise position.

CUR LIM

External main setting External duty setting

(Positive) (Positive)

Note: 1, 2, 3, 5, 6, and 7 are terminal numbers

of the G3PX.

TIME

TIME

Input signal

Reduce this period.

Input signal

Controlled
soft-start
up

Controlled
soft-start
up

88 Power Controllers G3PX

In the interest of product improvement, specifications are subject to change without notice.

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

Cat. No. K076-E1-04

• The Level indicator is not OFF with a 0% input signal (G3PX­2@0EUN Series).

Make sure that the BASE UP adjuster has been turned counter­clockwise to the minimum setting.

• The OPEN indicator of a multiple heater open circuit detection
model is lit at the initial stage (G3PX-2@0EHN Series).

Make sure that the initial settings are OK. If not, readjust the
G3PX.
Make sure that terminals 18 and 19 are open if the supply
frequency is 50 Hz. These terminals must be short-circuited if the
supply frequency is 60 Hz.

Make sure that the load current is large enough.

• The Level indicator LEDs of a constant-current model are all lit and
no power control operation is possible.

Make sure that the load current is large enough.
Countermeasure 1: Adjust the CUR LIM adjuster so that the LED

on the farthest right of the Level indicator is OFF.

Countermeasure 2: When the supply current is less than 50%,
increase the number of turns. When the supply current is 50% of
the rated current, the wires must be coiled twice on the CT Unit.
When the supply current is 25% of the rated current, the wires
must be coiled three to four times on the CT Unit.

• No reset will be performed even if the RESET button is pressed.
Check whether the RESET button is pressed while there is nothing
input into to power supply terminals 8 and 10 or 9 and 10 of the
G3PX.

Be sure to press the RESET button with power supplied to the
G3PX.

The following wiring will be required if the breaker or contactor
connected between the power supply and the G3PX is operated
by the relay output of the G3PX.

BASE UP

Make sure that the
adjuster is turned
counterclockwise to the
minimum setting.

Adjust so that this LED is OFF.

CUR LIM adjuster for limiting current

Load

Magnet
contactor