Features - Omron G3ZA User Manual

Features

1-1 Features
Overview
Optimum Cycle Control
Manipulated
variable: 20%
Offset Control
Manipulated Value
Calculations
Error Detection (4-channel
Controllers Only)
Number of Outputs
Connected
Alarm Output
Installation
2
The G3ZA is a Multi-channel Power Controller with externally connected
SSRs. It can receive manipulated variables from a PLC or other host via RS-
485 communications and control heater power with high precision via the
SSRs.
• Optimum cycle control is performed by driving SSRs according to load
power detection and trigger signals. (Zero-cross SSRs are used.)
• Noise is suppressed while ensure high-speed response by turning out-
puts ON and OFF each half cycle to achieve high-precision temperature
control.
1/5th ON (20%)
• The timing of turning ON the control outputs for G3ZA channels can be
offset.
• The manipulated variable can be calculated for one channel and the cal-
culated value can be output for another channel.
• The current flowing through the heater can be monitored to detect heater
burnouts, heater overcurrents, and SSR short circuits.
• Between one and four outputs can be connected to 4-channel Controllers
and between one and eight outputs can be connected to 8-channel Con-
trollers.
• An open-collector output terminal can be used to inform the host of errors
without using communications.
• RS-485 communications can be used to set and operate the G3ZA,
reducing the amount of wiring required between the G3ZA and host.
• Up to 31 Controllers can be connected to one communications line. With
4-channel Controllers, up to 124 channels can be controlled, and with 8-
channel Controllers, up to 248 channels can be controlled.
The following four models are available.
No. of channels
4 channels Supported
8 channels Not supported
Error detection
100 to 240 V
400 to 480 V
100 to 240 V
400 to 480 V
Section 1-1
Load power supply