GE Fanuc Series 90-30 PLC Hardware System

CPU350-374: Based on a more powerful 80386EX or 586 processor, supports up to 8 substrates (1 CPU+7 expansion/remote), has a maximum memory of 240K bytes (configurable), and supports floating-point operations.

CPU351/352/363: In addition to the standard serial port, it also provides two additional built-in serial ports (one RS-232 and one RS-485) to improve communication performance.

CPU364/374: Built in Ethernet interface, allowing access to Ethernet networks without the need for a separate Ethernet module. CPU374 also supports dual 10/100BASE-T/TX ports.

Additional functions of CPU:

Memory: All CPUs use RAM as working memory and are backed up by lithium batteries. Some CPUs support the use of flash memory or EPROM/EEPROM as non-volatile user program storage.

Clock: Modular CPUs all have built-in real-time clocks.

Key switch: CPU350-374 is equipped with a key switch, which can be used to protect flash memory, control run/stop status, and prevent memory modification.

Serial port: All CPUs' serial ports are accessed through a 15 pin D-type connector on the power module, supporting SNPs/SNPX protocol (slave).

2.4 Input/Output Modules

I/O module is the bridge between PLC and on-site equipment. The manual divides it into two categories: discrete quantities and analog quantities.

Discrete quantity module: divided into two types: standard density (16 points or less) and high-density (32 points).

Standard density module: equipped with detachable terminal boards for easy wiring and replacement. There are usually LED indicator lights on the front cover of the module to indicate the status of each point.

High density module: The front panel has single 50 pin or double 24 pin connectors for connecting cables to terminal boards or quick connect terminal blocks (TBQC). This type of module does not have fuses, but has a higher point density.

Analog module: used to process continuously changing signals such as temperature, pressure, flow rate, etc. The manual emphasizes that the wiring of analog modules must use shielded twisted pair cables, and the shielding layer should be grounded at one end (usually at the signal source end or module end, depending on the module type) to maximize noise suppression.

2.5 Option Modules

The optional module greatly expands the application range of Series 90-30 PLC. The manual introduces various optional modules, mainly including:

Communication module:

Genius Communication Module (GCM/GCM+): Used for high-speed, peer-to-peer global data exchange with other GE Fanuc PLCs on the Genius bus.

Genius Bus Controller (GBC): Used to control Genius I/O blocks and remote I/O stations.

Ethernet interface module: allows PLC to connect to Ethernet and supports client/server communication.

FIP bus controller/remote I/O scanner: used to connect to FIP (Factory Instrument Protocol) network.

Motion control module:

Motion Mate APM: Axis positioning module, supporting single or dual axis motion control.

Motion Mate DSM302/314: Digital servo module used to control servo motors and support high-precision positioning.

Other specialized modules:

High speed counter (HSC): used to process high-speed pulse signals up to 80 kHz.

I/O LINK master/slave module: used to connect Fanuc CNC or create I/O LINK networks.

Temperature Control Module (TCM): Provides closed-loop temperature control with up to 8 channels.

Programmable Coprocessor Module (PCM): Provides additional processing capabilities for PLCs, supports MegaBasic and C programming languages, and is used to handle complex communication and computing tasks.

Part Three: Installation and Wiring Specifications

3.1 Mechanical Installation

Installation direction: The substrate must be installed vertically to facilitate heat dissipation. Horizontal installation may result in power supply derating.

Heat dissipation space: There must be sufficient space around the substrate (usually at least 4 inches at the top and bottom) to ensure air circulation.

Environmental requirements: The working temperature range is 0-60 ° C, and the humidity is below 95% (no condensation). It should be avoided to use in environments containing corrosive gases, dust, or severe vibrations.

Installation steps: usually include marking installation holes, drilling holes, installing substrates, connecting safety grounding wires, setting the rack number of remote/expansion substrates, installing modules, etc. on the panel.

3.2 Electrical Wiring

Power wiring: The terminal block of the power module is used to connect the input power supply (AC or DC) and safety grounding. The manual emphasizes that for IT systems (floating neutral point systems), the factory jumper between terminals 3 and 4 on the power module must be removed, and external surge protection devices must be installed between L1 and ground, and L2 and ground.

I/O wiring: Standard density modules use detachable 20 pin terminal boards. The manual provides wiring diagrams and recommended wire diameters for each module. For the 32 point high-density module, it is connected to the user provided terminal board or GE Fanuc's quick connect terminal block (TBQC) through a dedicated cable. The TBQC system can significantly reduce wiring time.