User manual OMRON G3ZA

[. . . ] Multi-channel Power Controller G3ZA Optimum Cycle Control for High-precision Control with Low Noise · Smaller than a Normal Power Controller. · Enables low-noise power control in combination with zero-cross SSRs. (See note. ) · One Controller can control up to 8 SSRs. · RS-485 communications to set manipulated variables and heater burnout detection. [. . . ] Do not install the product near devices generating strong highfrequency fields or surges. When using a noise filter, check the voltage and current and install it as close to the product as possible. 11. For a safety disconnection of the power-line in the application, the equipment must be provided with disconnecting devices suitable for isolation. (e. g. , circuit breakers defined in IEC60947-2, power switches defined in IEC60947-3, power plugs, etc. ) !CAUTION Do not allow pieces of metal, wire clippings, or fine metallic chips or filings from installation to enter the product. Doing so may occasionally result in electric shock, fire, or malfunction. Do not use the product in locations of flammable or explosive gases. Doing so may occasionally result in minor or moderate explosion, causing minor or moderate injury, or property damage. Do not attempt to disassemble, repair, or modify the product. Doing so may occasionally result in minor or moderate injury due to electric shock. Perform correct setting of the product according to the application. Failure to do so may occasionally cause unexpected operation, resulting in minor or moderate injury, or damage to the equipment. Ensure safety in the event of product failure by taking safety measures, such as installing a separate monitoring system to provide alarms for preventing excessive temperature rise. Product failure may occasionally prevent control operation, resulting in damage to the connected facilities and equipment. Tighten the terminal screws securely using a tightening torque within the following ranges. Loose screws may occasionally cause fire, resulting in minor or moderate injury, or damage to the equipment. Terminal screws: 0. 40 to 0. 56 N·m Version 1. 0 Usage Precautions Version 1. 0 is for single-phase loads only. Do not connect a three-phase SSR, or to an SSR that is not magnet relay or zero-cross. Version 2. 0 Usage Precautions · Check the G3ZA settings and select the correct SSR from the following when wiring an SSR. · SSR with zero-cross function for single-phase heaters · SSR without zero-cross function for single-phase heaters · Three-phase SSR Do not connect a magnet relay. · Check the G3ZA settings and select the correct CT from the following when wiring a CT. · E54-CT1 · E54-CT3 · G3ZA-CT150L Precautions for Safe Use 1. Do not use the product in the following locations. · Locations subject to direct radiant heat from heating equipment · Locations where the product may come into contact with water or oil · Locations subject to direct sunlight · Locations where dust or corrosive gases (in particular, sulfuric or ammonia gas) are present · Locations subject to extreme temperature changes · Locations where icing or condensation may occur · Locations subject to excessive shocks or vibration 2. [. . . ] To restrict heating, attach a fan to the ventilation outlet or air inlet of the control panel to ventilate the panel. This will reduce the ambient temperature of the SSRs and thus increase reliability. (Generally, each 10°C reduction in temperature will double the expected life. ) SSR rated current (A) 10 A 20 A 0. 31 30 A 0. 47 40 A 0. 62 60 A 0. 93 SSR 60 mm min. Vertical direction Required number of fans 0. 16 per SSR 80 mm min. 30 mm min. Example: For 10 SSRs with load currents of 20 A, 0. 31 × 10 = 3. 1 Thus, 4 fans would be required. Size of fans: 92 mm2, Air volume: 0. 7 m3/min, Ambient temperature of control panel: 30°C min. If there are other instruments that generate heat in the control panel other than SSRs, additional ventilation will be required. Relationship between SSRs and Ducts Duct Height Countermeasure (1) 50 mm max. Duct or airflow obstruction (A height of no more than half the SSR's height is recommended. ) SSR EMC Directive Compliance The G3PA complies with EMC Directives under the following conditions. Input cable length Load Countermeasure (2) Mounting surface SSR Mounting surface Airflow Input G3PA Output SSR Vertical direction Mounting surface Film capacitor · 1 µF, 250 VAC (G3PA-2 [. . . ]