Omron G3ZA-4H203-FLK-UTU, G3ZA-4H403-FLK-UTU, G3ZA-8A203-FLK-UTU, G3ZA-8A403-FLK-UTU Brochure

Multi-channel power controller

A smart approach to fast, low-noise heater power regulation.

The G3ZA is a multi-channel power controller that provides clever
switching of up to eight solid state relays (SSRs). It is available
in four versions - either with 4 channels(with heater burnout
alarm) or 8 channels (without heater burnoutalarm), and for
high- or low-voltage power supplies.

This multi-channel power controller is designed to improve
performance of existing heater switching control components
while reducing complexity and costs. Installthe G3ZA beside
a bank of SSRs and reap the benefits of reduced wiring and
simplified programming control! The advantages of this

distributed control are immediately apparent. The small-sized
unit can control up to eight SSRs with only a single RS-485 2-wire
link to the PLC or PC. The manipulated variable control signal
(output %) from the PLC is automatically converted into a PWM
trigger signal within the G3ZA, so there is no need for an extra
conversion unit or digital output cards.

The G3ZA is designed according to Omron’sSmart Platform
concept for easy integration ofcomponents and systems.
PLC function blocks are available to significantly reduce ladder
programming time.

G3ZA

Actual

size

Advanced Industrial Automation

Product positioning

Phase angle

High speed

High resolution

Low speed

Coarse resolution

~0 0 1s 5s 10s +

G3ZA + SSRSCR SSR EM relay

Zero cross Standard SSR solutions

Features at a glance

•Compact size

•Capable of driving up to
eight SSRs

•Connects to RS-485 Compoway-F
network (ModBus in preparation)

•Better performance with
standard SSRs

•Lower noise than with Phase
Angle (SCR) control

•Lower peak current when using
offset control

Optimum Cycle Control

The G3ZA uses Optimum Cycle Control to improve
overall performance and provide more accurate temper­ature control. When used together with any zero­switching SSR (e.g. Omron’sG3NA) the G3ZA achieves
extremely low power noise levels that meet stringent
EMC standards. Power factor is significantly improved
and bulky filtering installations normally required for
phase control are not needed. In addition, the G3ZA
uses half-cycle switching and hasa resolution of 10ms,
making it ideal for applications where precise tempera­ture control is crucial.

Offset control

By using an offset control algorithm for the various
channels, the G3ZA reduces peak switching currents
and enables the downsizing of ancillary units and
cabling. At lower powers in a full production cycle (for
example MV < 40%), the benefit becomes significant
because the total current is distributed more evenlyin
time. The more heaters you use the greater the benefit!

Monitoring and control

The G3ZA uses an RS-485 communications linkto
receive MV signals from a PLC or PC and to send back
status information (like heater burnout detection).
Because it only involves a two-wire link, the G3ZA can
be located inside the power cabinet, and the cabinet
can be placed close to the heater.

Typical applications for the
G3ZA include:

Multi-zone electrical ovens

In roller hearth continuousfurnaces, where tempera­tures reach 800°C, the G3ZA’s stable, distributed
switching is ideal during critical parts of the
heating process.

Thermo-moulding

The G3ZA is suitable for the PET bottle pre-forming
process where many heaters are needed along with
lots of power and precise heating control to get the
moulded product just right.

TV industry

The treatment and coating of glass windows, especially
in the flat-panel display manufacturing process,
requires fast, accurate heating and cooling. The G3ZA’s
ability to distribute power accurately and quickly
makesitsuitable for this application.

Available product types

Number of channels Heater burnout detection Load power supply

G3ZA-4H203-FLK-UTU
G3ZA-4H403-FLK-UTU
G3ZA-8A203-FLK-UTU
G3ZA-8A403-FLK-UTU

4

8

Yes

No

100 to 240 VAC
400 to 480 VAC
100 to 240 VAC
400 to 480 VAC

Host

(e.g. PLC or PC)

G3ZA

SSR

SSR

SSR

CT

Load

Load

Load

Load power
supply

20%

50%

ch1

ch2

ch3

ch1

ch2

ch3

Tot al
current

Traditional ON/OFF control

Offset control

Tot al
current

SF2P_G3ZA_EN_INT01_0305

Although we strive for perfection, Omron Europe BV

and/or its subsidiary and affiliated companies do not

warrant or make any representations regarding the

correctness or completeness of the information

described in this document. We reserve the right to

make any changes at any time without prior notice.

OMRON EUROPE B.V.

Wegalaan 67-69, NL-2132 JD, Hoofddorp, The Netherlands. Tel: [phone] Fax: [phone] www.europe.omron.com

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