The GE Fanuc Emerson IC694MDL940 is a 16-point Form A relay output module for the PACSystems RX3i series. It provides 2 Amp switching per channel across four isolated groups, offering high-performance control for motor starters and solenoids with 1500 VAC signal protection.
The IC694MDL940 serves as a high-density 16-point relay output module within the Emerson PACSystems RX3i platform. This module actively interfaces the PLC processor with external field equipment, allowing for the precise control of high-power devices such as motor starters, solenoids, and industrial indicators. By utilizing 16 normally open (Form A) relay contacts, the hardware provides mechanical switching capabilities that bridge the gap between low-voltage logic and high-voltage field loads. Because it occupies only a single slot on the RX3i backplane, it offers a space-efficient solution for scaling I/O density in complex automation environments.
The engineering behind the IC694MDL940 prioritizes electrical safety and system longevity. Specifically, the module organizes its 16 channels into four isolated groups of four, providing a high degree of electrical separation between different circuit types. Each individual channel supports a maximum continuous load of 2 Amps, while each four-channel group manages a total current capacity of 4 Amps. Furthermore, the internal relay architecture accommodates inrush currents up to 5 Amps, which allows the system to handle the initial surge typical of inductive loads. To safeguard the backplane from field transients, the module maintains a robust isolation barrier of 1500 VAC for one minute, effectively decoupling field-side disturbances from the sensitive controller logic.
Technicians benefit from enhanced visibility through 16 individual status LEDs located on the front faceplate. These indicators actively display the “On/Off” state of each relay channel, which significantly accelerates the troubleshooting process during commissioning or maintenance. In terms of power consumption, the module draws 135 mA from the 24V DC relay bus and a minimal 7 mA from the 5V DC backplane bus. While the module provides exceptional switching performance with a response time of 15 ms, it does not include internal fuses. Consequently, users must install external circuit protection to prevent thermal damage from overcurrent conditions in the field.
Because it belongs to the PACSystems RX3i family, the IC694MDL940 integrates seamlessly with current RX3i CPUs and backplanes. This compatibility ensures that the module can be hot-swapped or installed in any available I/O slot without disrupting universal backplane communication. Its rugged construction and high isolation ratings make it an ideal choice for heavy industries such as power generation, wastewater treatment, and petrochemical processing. Ultimately, the IC694MDL940 delivers a reliable mechanical interface that combines the traditional benefits of relay switching with the advanced diagnostics of modern PLC systems.
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