GE-FanucIC693CPU331-CESeries 90-30 Single-Slot CPU Module, 80188 at 10 MHz, 16K User Memory, 512 In / 512 Out

Product Description

What this part is

GE Fanuc IC693CPU331, the CPU331 processor for the Series 90-30 programmable controller. It is the brain of the rack: it executes the ladder program, scans the I/O modules and drives backplane communication. This is a single-slot CPU module — a card that plugs into the dedicated CPU slot of a Series 90-30 baseplate. It is not a baseplate and it is not a rack; some resellers describe CPU331 as “integrating a 10-slot baseplate”, which conflates the CPU with the IC693CHS391 baseplate it usually sits in. Those are two separate purchases.

Decoding the order code

IC693 – GE Fanuc Series 90-30 product familyCPU – central processing unit module331 – the model within the 90-30 CPU range: 80188 processor, 16K bytes of user program memory, single slot-CE – the CE-marked build for European conformity; functionally the same processor

Published specifications

CPU type: single slot CPU moduleProcessor: 80188, 16-bitProcessor speed: 10 MHzTypical scan rate: 0.4 ms per 1K of boolean contact logicUser program memory: 16K bytes maximum — fixed, not expandableDiscrete input points (%I): 512Discrete output points (%Q): 512Discrete global memory (%G): 1280 bitsInternal coils (%M): 1024 bitsOutput (temporary) coils (%T): 256 bitsSystem status references (%S, %SA, %SB, %SC): 128 bits, 32 bits eachRegister memory (%R): 2048 wordsAnalog inputs (%AI): 128 wordsAnalog outputs (%AQ): 64 wordsMaths: integer operations; no floating-point hardwareTotal baseplates per system: 5 — one CPU baseplate plus up to four expansion and/or remoteLoad required from the rack power supply: 350 mA from the +5 V DC supplyOperating temperature: 0 to 60 °C (32 to 140 °F) ambientApproximate dimensions: 18 x 6 x 18 cm; weight about 0.3 kg

What these specs mean in practice

CPU331 sits in the lower-middle of the 90-30 range and is a sound choice for small to mid-sized sequential control: conveyor lines, machine sequencing, packaging, simple process skids. The 0.4 ms per 1K scan figure means a few thousand rungs still scans in single-digit milliseconds, which is fast enough for essentially all relay-replacement duty.

Two limits decide whether this is the right CPU for you. First, the 16K bytes of user program memory is fixed — there is no memory expansion option, so a program that does not fit needs a higher CPU such as the CPU341, which supports substantially more. Second, there is no floating-point hardware: the 80188 does integer maths only. Scaling, PID-style arithmetic and unit conversion all have to be written in integer form, which is normal practice for this platform but worth knowing before you port logic down from a newer controller.

The 512 discrete inputs and 512 discrete outputs, with 128 analog input words and 64 analog output words, is a generous envelope for a four-expansion-baseplate system, so I/O count is rarely the binding constraint on a CPU331 — program memory usually is.

What is included

CPU module only, as pictured. This listing does not include a baseplate or backplane — the CPU needs a Series 90-30 CPU baseplate such as the 10-slot IC693CHS391 or a 5-slot equivalent, and there is only ever one CPU baseplate per system. Also not included: a rack power supply (the CPU draws 350 mA from it but does not contain one); any I/O or option modules; expansion baseplates or the expansion cable; a memory cartridge or backup battery; a programming cable; Logicmaster 90-30, VersaPro or Proficy Machine Edition software; or documentation. Communications option modules — Ethernet, Genius, Profibus — are separate purchases.

Installation and setup notes

The CPU goes in Slot 1 of a modular CPU baseplate, which is labelled CPU/1 and is a unique connector size that accepts only a CPU or a designated special option module such as the IC693BEM330 FIP Remote I/O Scanner. It will not seat in a numbered I/O slot. The power supply occupies the unnumbered leftmost slot, which likewise takes nothing else. A modular CPU baseplate is always Rack 0 by default. If you are running expansion baseplates, remember the CPU331 supports a maximum of four, and total interconnecting cable must not exceed 50 ft (15 m). Verify the program in the CPU is the one you want before running the machine; treat any resident program on a surplus CPU as unknown and reload from your own archive. Handle as static-sensitive.

Interchange guidance

IC693CPU331-CE and IC693CPU331 are the same processor, the CE suffix denoting the CE-marked build. Other 90-30 CPU numbers are different processors, not equivalents: CPU340 and CPU341 offer more program memory, and CPU350 and above raise the expansion-baseplate limit from four to seven, so moving up is an upgrade rather than a swap and may require a configuration change. Going the other way, a program written for a CPU341 may not fit in this CPU’s 16K. Related items sold separately include the IC693CHS391 10-slot CPU baseplate, IC693CHS392 10-slot expansion baseplate, IC693CHS398 5-slot expansion baseplate, and IC693 series discrete and analog I/O modules. Also searched as IC693-CPU-331-CE, IC693 CPU 331, CPU331, IC693CPU331CE, and GE 90-30 CPU module.