Omron G3PX 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 Open 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
• OMRON’suniquedesignandcarefully-selectedmaterialsmade
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.
12 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 Device 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-kΩVariable Resistor
V2K: 2-kΩVariable Resistor
12
3
G32X-@@
1234
G32X-@@@
12
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. For a rated voltage 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. For a rated voltage 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. For a rated voltage 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 Ambient 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 short-
circuited when the supply frequency is 60 Hz.
2. Use the G32X-V2K 2-kΩVariable Resistor for external main setting on EUN, EC, and EHN (G32X-V3K 3-kΩfor 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 Device Cartridge 20 A G3PX-220E@@ G32X-A20
40 A G3PX-240E@@ G32X-A40
60 A G3PX-260E@@ G32X-A60
Item G3PX-
220EUN/
240EUN/
260EUN
G3PX-
220EH/
240EH/
260EH
G3PX-
220EHN/
240EHN/
260EHN
G3PX-
220EC/
240EC/
260EC
Rated voltage 100/110, 200/230 VAC
Frequency 50/60 Hz (See note 1.)
Input
signal for
control
External main
setting
(See note 2.)
2 kΩ(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: 250Ω) (See note 3.)
Voltage ON/
OFF input 5 to 24 VDC (Input impedance: approx. 20 kΩ)
External duty
setting 3 kΩ(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@N100/110, 200/230 VAC (50/ 60 Hz) 1 to 20 A (See note.) 220 A (60 Hz, 1 cycle) Single
G3PX-240E@
G3PX-240E@N1 to 40 A (See note.) 440 A (60 Hz, 1 cycle)
G3PX-260E@
G3PX-260E@N1 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 voltageadjustable
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
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 MΩmin. (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/s2
Shock resistance Malfunction: 300 m/s2
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 MΩmin. (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/s2
Shock resistance Malfunction: 300 m/s2
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 (%)
In
p
ut current
(
mA
)
G3PX-EC Models G3PX-EUN/EH/EHN Models
Output voltage (%)
In
p
ut current
(
mA
)
100%
60%
40%
20%
Output voltage (%)
In
p
ut current
(
mA
)
G3PX-2@0EUN Models
Output voltage (%)
In
p
ut 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 soft-
start 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 Function
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 SHORT indicator are lit. When you 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
5G3PX
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 singleTemperature
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
5G3PX 3 5G3PX 3 5G3PX
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.
Turn 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-kΩtype) 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 1/6πor more in width.
2. Besure toprepareterminals18and19correspondingtothe
supply frequency of 50 Hz or 60 Hz. Otherwise, a setting
error will result in a malfunction regardless ofthe 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 overcurrent 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 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. 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 Variable 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 kΩG32X-V3K (See note 2.)
2 kΩG32X-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 attention 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