GE Series 90-30 IC693 Modules: IC693MDL752 Output Module —

Technical Dossier

Product Details And Specifications

GE Series 90-30 (IC693) PLC: Comprehensive Module Range and Technical Overview

The GE Series 90-30, identified by the IC693 prefix, is a modular programmable logic controller platform developed by GE Automation & Controls (now part of Emerson / Proficy portfolio). It has been deployed extensively across global heavy industry sectors including petrochemical refineries, nuclear power auxiliary systems, pulp and paper mills, water treatment facilities, and continuous manufacturing lines. Its rack-based architecture supports mixed I/O configurations, making it a standard reference platform for distributed control system (DCS) integration projects requiring deterministic scan-cycle performance.

The IC693MDL752 is a discrete output module within this family, providing 32 points of 12/24 VDC positive logic output at 0.5A per point. It occupies a single slot in any IC693 5-slot, 10-slot, or expansion rack and communicates over the Series 90-30 backplane bus.

The Evolution of IC693 Series 90-30 Architecture

The Series 90-30 platform was introduced in the late 1980s as a mid-range PLC targeting applications that required more I/O density than micro-PLCs but did not justify the cost of a full Series 90-70 mainframe. The original CPU modules (IC693CPU311, IC693CPU313) operated at 0.6–1.0 ms/K scan rates with limited memory. Successive CPU generations (IC693CPU321, IC693CPU331, IC693CPU341, IC693CPU360, IC693CPU364, IC693CPU374) progressively expanded program memory from 6 KB to 240 KB, added Ethernet ports, and introduced support for Profibus-DP and DeviceNet via plug-in communications modules.

The I/O subsystem evolved in parallel: early discrete modules supported 8 or 16 points; later generations introduced 32-point density modules (including the IC693MDL752) to reduce rack slot consumption. Analog modules transitioned from 12-bit to 16-bit resolution. The backplane bus protocol remained backward-compatible throughout, allowing IC693 racks from different production eras to coexist in the same system — a critical factor for long-lifecycle plant installations where full system replacement is not economically viable.

As of 2024, GE/Emerson has formally classified the majority of IC693 hardware as end-of-life (EOL) or last-time-buy. Installed base support now depends on third-party MRO suppliers and certified repair facilities.

IC693 Series 90-30 Full Catalog & Functionalities (SKU List)

CPU Modules

• IC693CPU311: 6 KB program memory, 0.6 ms/K, no Ethernet, base CPU for small applications.
• IC693CPU313: 12 KB program memory, enhanced instruction set, single-slot form factor.
• IC693CPU321: 32 KB memory, floating-point math, supports up to 8 expansion racks.
• IC693CPU331: 32 KB memory, built-in serial port, standard mid-range CPU.
• IC693CPU341: 240 KB memory, Ethernet TCP/IP port, SRTP protocol support.
• IC693CPU360: 240 KB memory, dual Ethernet ports, high-speed counter support.
• IC693CPU364: 240 KB memory, embedded Ethernet, web server capability.
• IC693CPU374: 512 KB memory, Motion Mate DSM support, high-performance variant.

Discrete Input Modules

• IC693MDL632: 16-point 24 VDC positive logic input module, 1 ms filter.
• IC693MDL634: 16-point 24 VDC input, isolated commons, CE-marked variant.
• IC693MDL645: 16-point 120 VAC input module, standard industrial voltage.
• IC693MDL654: 32-point 24 VDC input, high-density, single slot.

Discrete Output Modules

• IC693MDL740: 8-point relay output, 2A per point, Form A contacts.
• IC693MDL741: 16-point relay output, 2A per point, isolated commons.
• IC693MDL752: 32-point 12/24 VDC positive logic output, 0.5A per point, single slot. (Current product)
• IC693MDL753: 32-point 12/24 VDC negative logic output, 0.5A per point.
• IC693MDL760: 16-point 120 VAC output, 0.5A per point, triac-based.

Analog Modules

• IC693ALG220: 4-channel analog input, 0–10V / 4–20 mA, 12-bit resolution.
• IC693ALG390: 4-channel analog output, 0–10V / 4–20 mA, 12-bit resolution.
• IC693ALG442: 8-channel analog input, 16-bit resolution, high-accuracy variant.

Communications & Specialty Modules

• IC693CMM311: Serial communications module, RS-232/RS-485, SNP/SNPX protocol.
• IC693CMM321: Ethernet interface module, 10 Mbps, SRTP/Modbus TCP.
• IC693PBS301: Profibus-DP slave adapter, up to 244 bytes I/O.

Power Supply Modules

• IC693PWR321: 120/240 VAC input power supply, 30W output, standard rack PSU.
• IC693PWR322: 24 VDC input power supply, 30W, for DC-powered panel installations.
• IC693PWR330: High-capacity 120/240 VAC supply, 40W, for fully loaded 10-slot racks.

Sourcing Hard-to-Find & Obsolete IC693 Parts

With GE/Emerson having issued EOL notices across the IC693 product line, procurement of replacement modules through OEM channels is no longer reliable. DriveKNMS maintains a dedicated inventory of IC693 spare parts sourced from decommissioned plant equipment, authorized surplus channels, and long-term storage stock. All units are cataloged by part number, firmware revision where applicable, and physical condition grade.

For critical infrastructure operators — refineries, power generation facilities, water utilities — DriveKNMS provides lifecycle extension support including: same-day quotation on in-stock IC693 modules, cross-reference identification for discontinued part numbers, and coordination of repair/exchange programs for modules with repairable faults (blown output drivers, failed backplane connectors, corrupted firmware). Customers operating mixed-generation IC693 racks can request compatibility verification before purchase.

Quality Control for the IC693 Range

IC693 modules present specific test challenges due to their backplane-dependent communication architecture. DriveKNMS applies the following verification procedures to all IC693 inventory:

• Backplane Bus Integrity Test: Each module is seated in a live IC693 rack and polled by a reference CPU to confirm backplane register read/write without bus errors or timeout faults.
• I/O Point Functional Test: For discrete modules (including IC693MDL752), all 32 output points are individually energized and verified against a resistive load bank. Open-circuit and short-circuit protection behavior is confirmed.
• Analog Calibration Verification: Analog I/O modules are tested against a calibrated signal source; channel-to-channel offset and gain error are measured and documented.
• CPU Memory and Program Retention Test: CPU modules are loaded with a reference ladder program, power-cycled 10 times, and verified for program retention and fault-free startup.
• Visual and Mechanical Inspection: Connector pins, faceplate labels, LED indicators, and PCB condition are inspected under magnification. Modules with bent pins or cracked housings are rejected from saleable inventory.