GE IC697ALG321 Analog Input Module

Technical Dossier

Product Details And Specifications

GE Series 90-70 (IC697) Series Technical Notes

The GE Series 90-70 — identified by the IC697 prefix — is one of the most widely deployed rack-based PLC platforms in global heavy industry. Installed across petrochemical complexes, nuclear power stations, oil refineries, pulp and paper mills, and large-scale water treatment facilities, the Series 90-70 architecture established the benchmark for high-density, high-availability programmable control in the 1990s and 2000s. Its 9-slot and 16-slot VME-based backplane supports mixed I/O configurations, redundant CPU arrangements, and high-speed communications — making it a platform of record for facilities with 20–30 year operational lifecycles.

The IC697ALG321 is a 16-channel analog input module within this family, designed for precision voltage and current signal acquisition in process control environments. It interfaces directly with the Series 90-70 backplane bus and is configurable via the GE Proficy Machine Edition (formerly Logicmaster 90) programming environment.

The Evolution of IC697 (Series 90-70) Architecture

The Series 90-70 platform was introduced by GE Fanuc Automation in the early 1990s as a successor to the Series Six and Series Five PLC families. Its VMEbus-derived backplane provided a significant leap in data throughput and module density compared to proprietary bus architectures of the era.

Generation 1 (1991–1997): Initial CPU modules (IC697CPU731, IC697CPU771) with limited memory and no embedded Ethernet. Programming via serial RS-422 using Logicmaster 90-70 software on DOS platforms.

Generation 2 (1997–2004): Introduction of high-performance CPUs (IC697CPU781, IC697CPU782) with expanded memory maps, floating-point coprocessors, and support for the Genius Bus Controller (IC697BEM731). Ethernet NIU modules (IC697CMM742) enabled network integration.

Generation 3 (2004–2012): CPE010/CPE020/CPE030 series CPUs introduced with embedded Ethernet ports, replacing the need for separate NIC modules. Compatibility with Proficy HMI/SCADA and OPC-DA servers established.

Compatibility note: IC697 modules are not electrically or mechanically interchangeable with the Series 90-30 (IC693) or PACSystems RX7i (IC698) families, despite sharing programming software lineage.

IC697 Full Catalog & Functionalities (SKU List)

Analog Input Modules

• IC697ALG321: 16-channel analog voltage/current input, ±10V / 4–20mA, 12-bit resolution
• IC697ALG320: 8-channel analog input module, voltage/current configurable per channel
• IC697ALG440: 4-channel analog input, high-speed, for fast process loops
• IC697ALG441: 4-channel analog input with isolated channels, thermocouple/RTD compatible

Analog Output Modules

• IC697ALG320: 8-channel analog output, 0–10V / 4–20mA selectable
• IC697ALG432: 4-channel analog output, 12-bit, voltage and current output
• IC697ALG442: 4-channel isolated analog output module

Digital Input Modules

• IC697MDL340: 32-point 24VDC positive logic discrete input module
• IC697MDL341: 32-point 24VDC negative logic discrete input module
• IC697MDL653: 16-point 120VAC isolated discrete input module
• IC697MDL654: 32-point 120VAC discrete input module

Digital Output Modules

• IC697MDL752: 32-point 24VDC positive logic discrete output, 0.5A per point
• IC697MDL753: 32-point 24VDC negative logic discrete output module
• IC697MDL940: 16-point relay output module, Form C contacts

CPU & Controller Modules

• IC697CPU771: Series 90-70 CPU, 512KB user memory, standard performance
• IC697CPU781: High-performance CPU, 1MB user memory, floating-point support
• IC697CPU782: Dual-port memory CPU for redundancy configurations
• IC697CPE010: Enhanced CPU with embedded 10/100 Ethernet port
• IC697CPE030: High-capacity CPU, 10MB user memory, embedded Ethernet

Communications & Network Modules

• IC697BEM731: Genius Bus Controller, master/slave Genius network interface
• IC697CMM742: Ethernet NIC module, 10BaseT, TCP/IP and SRTP protocol support
• IC697CMM711: Serial communications module, RS-232/RS-422/RS-485

Power Supply Modules

• IC697PWR710: 120/240VAC input power supply, 30W output for 9-slot rack
• IC697PWR711: 24VDC input power supply, 30W, for DC-powered installations
• IC697PWR724: High-capacity power supply, 55W, for fully populated 16-slot racks

Sourcing Hard-to-Find & Obsolete IC697 Parts

• Functional testing against GE's original I/O accuracy specifications (±0.1% full scale)
• Firmware version verification and documentation
• Traceability records for each unit shipped
• Emergency urgent RFQ handling for critical plant shutdowns

Quality Control for the IC697 Range

The IC697 backplane operates on a proprietary parallel bus at 5V logic levels. Module testing requires a live Series 90-70 rack environment or a dedicated backplane simulator — standard bench testers used for IC693 or IC698 modules are not compatible.

DriveKNMS quality control procedures for IC697 modules include:

• Backplane bus integrity test: Each module is seated in a powered IC697 rack and polled by a reference CPU to confirm correct slot addressing and data exchange.
• Analog channel calibration (for ALG-series): All 16 channels of the IC697ALG321 are verified against a calibrated signal source at 0%, 25%, 50%, 75%, and 100% of input range. Results are logged and shipped with each unit.
• Thermal cycling: Modules are cycled between 0°C and 60°C operating range to identify latent component failures before dispatch review.
• Visual and component inspection: PCB inspection for corrosion, capacitor bulge, cold solder joints, and counterfeit IC markings.
• Firmware and configuration reset: All modules are returned to factory default configuration state prior to shipment.