OMRON G3PW Power Controllers

Product Overview

Omron G3PW is a single-phase thyristor power controller used for precision temperature control, receiving 4-20mA/1-5VDC analog or switch signals to achieve power regulation.

Model classification:

Standard type (EU): No constant current detection

Constant Current (EC): Built in CT, supports constant current, wire breakage detection RS-485

Electrical specifications:

Parameter values

Rated voltage 100-240VAC

Frequency 50/60Hz

Rated current 20A/45A/60A

Control mode: phase/optimal period/on-off control

Communication RS-485 (CompoWay/F), constant current only

Core functions

control mode

Phase control: precise temperature control, suppression of surges

Optimal cycle control: zero crossing switch to reduce noise

On/off control: adapted to switch signal

Protection and regulation functions

Soft start/soft stop: adjustable from 0.0 to 99.9s, default is 0.5s

Output limiting: upper limit 0-100%, lower limit 0-100%

Base value function: 0-100%, maintains the lowest output when inputting 0%

Constant current control: only constant current, fluctuation ± 2% FS

Heater wire breakage detection: based on resistance changes, with an accuracy of 10% FS

monitoring function

Monitoring items: input value, output value, phase angle, load current, total operating time

Alarm: 2-channel open collector output, classified into lethal/non lethal levels

Installation specifications

Environmental Requirements

Indoor use only, -15~55 ℃, humidity 5% -95%

Stay away from water, oil, dust, corrosive gases, and sources of vibration

Installation spacing

Leave * * ≥ 100mm * * heat dissipation space on top and bottom respectively

Left and right ≥ 20mm, multiple units arranged side by side require forced air cooling

Fixed requirements

Screw: M5, torque 2.3-2.5N · m

Vertical installation ensures natural convection heat dissipation

Wiring specifications

Power and load wiring

Power supply connected to terminals 4 (N)/5 (L), load connected to T1/L1, same phase matching

Load side equipped with fast fuses: 20A with CR6L-20, 60A with CR6L-75

Control wiring

Analog quantity: 4-20mA (terminal 2/3), 1-5V (terminal 1/3)

Communication: RS-485 (±), maximum distance 500m, nodes ≤ 31

grounding

Grounding resistance * * ≤ 100 Ω * *, use a heat sink to install screws for grounding

Wire gauge and torque

Terminal type, wire gauge, torque

Load terminal (20A) AWG10-18 1.8N · m

Control terminal AWG26-16 0.22N · m

Parameter settings

Initial setting level (long press LVL ≥ 2s)

P02: Output mode (phase/voltage/square voltage/constant current)

P04: Input type (linear/switch quantity)

P10: Load current upper limit (0-66A, constant current)

P14: Wire breakage alarm level

P19-P26: Communication parameters (default 57.6kbps, 7-bit data, even parity)

Adjust setting level (short press LVL)

DTY: Internal duty cycle (0-100%)

BUP: Base Value (0-100%)

SUP/SDN: Soft Start/Soft Stop Time

OLU/OLL: Output upper and lower limits

Safety and fault handling

Safety Warning

Do not dismantle or touch terminals with electricity to prevent electric shock

Prohibited for use in flammable and explosive environments

Tighten terminal screws to prevent sparking

Common Faults

Solution to the cause of code malfunction

E10 SSR short circuit/wiring error check wiring, heater, reset

E40 heater wire breakage, replace heater, re teach

E70 communication timeout check line, resend command

Reset method: panel ENT/RST key, external reset terminal, communication command

Application scenarios

Temperature control of pure metal/non-metal heaters

Primary side power regulation of transformer

Multi unit network: up to 8 units connected to EJ1 temperature controllers, RS-485 networking

Key questions and answers

Question 1: What is the core difference between G3PW standard type and constant current type?

Answer: The core difference lies in detection and communication capabilities:

Constant current built-in CT current transformer, supporting constant current control, load current limitation, and heater wire breakage detection; The standard model does not have this function.

Constant current standard RS-485 (CompoWay/F) communication, can be connected to EJ1 temperature controller/PLC network; Standard type without communication interface.

Constant current mode can monitor real-time load current, while standard mode only monitors output percentage.

Question 2: What are the core safety points for the installation and wiring of G3PW?

Answer: There are three core security requirements:

Heat dissipation: A space of * * ≥ 100mm * * must be left above and below, and vertical installation should ensure natural convection.

Wiring: Load T1 is connected to the N phase of the power supply, L1 is connected to the L phase, and matched in phase; The load side must be connected in series with a fast fuse.

Grounding: Grounding resistance * * ≤ 100 Ω * *, grounded with radiator screws; Do not use live wires or touch terminals.

Question 3: What is the setting and troubleshooting process for the heater wire breakage detection (E40)?

answer:

Setting: Set the constant current P14 as alarm 1/2; Adjust the HBR (threshold=90/number of heaters) and HBL (lower detection limit); Perform TPC/TCC demonstration after stable operation.

Troubleshooting: First check if the heater is open circuited; Confirm again whether the demonstration was successful; If there is a small output false alarm, increase the lower limit of HBL; If there is a large fluctuation, increase the number of P09 detection cycles.

Reset: Use ENT/RST keys, external reset, or communication commands to clear the alarm.