IC694MDL350 Digital Output Modules GE Fanuc PACSystems RX3i

The GE Fanuc IC694MDL350, also cataloged as the IC694MDL350 AC Voltage Output Module, operates as a dedicated hardware component for discrete state execution within PACSystems RX3i platforms. It translates internal logic state registers into physical control actions by switching independent 120 VAC load circuits connected across the system backplane structure.

Hardware Specifications

Backplane Bus Communication Velocity and Density Scaling

This module utilizes the high-speed RX3i PCI backplane bus structure to maximize backplane bus communication velocity during discrete output channel sweeps. The 16 solid-state switches are distributed across 4 isolated groups, supporting complex I/O density scaling profiles without exceeding standard backplane load limits. Each group functions under an independent common pin, enabling the integration of distinct power branches on a single module. Onboard memory configurations achieve instantaneous synchronization via firmware flash compatibility protocols with the host CPU, suppressing phase jitter during continuous multi-channel toggling operations.

Frequently Asked Questions

Q: Does the IC694MDL350 module support hot-swap insertion and extraction within the RX3i rack assembly?

A: Yes. The PACSystems RX3i backplane infrastructure permits hot-swap operations for this module. The technician must engage the upper and lower chassis latches firmly during removal or insertion to prevent momentary interruption of adjacent communication channels on the active bus.

Q: Why do external AC loads remain partially energized when the module logic states are commanded off?

A: The internal solid-state Triac switches incorporate RC snubber networks that introduce a maximum output leakage current of 3.1 mA at 120 VAC. If the attached field device exhibits a current consumption footprint below the 50 mA minimum load threshold, this leakage will sustain a residual voltage across the terminals.

Q: How is individual channel safety managed during external overcurrent faults?

A: The module does not integrate internal electronic short-circuit protection or fusing. Each isolated group requires the installation of external fast-acting fuses sized appropriately for the branch wire diameter and the 2.0 A common group current limit to prevent circuit board destruction.

Field Installation Guidelines

• Chassis Slot Mechanical Retention: Press the module firmly into the designated RX3i universal backplane slot until the rear connector seats completely. Ensure the top and bottom plastic tabs click into the chassis frame to verify mechanical locking engagement.
• Terminal Wiring and Separation: Secure field wiring into the detachable terminal block terminal pins using wire sizes between 14 AWG and 22 AWG. Run the 120 VAC power distribution lines in physical wire trays separate from high-density DC signal cables.
• Torque Specifications: Tighten all terminal terminal block screws to a limit of 0.5 Nm. Loose connections will provoke high local contact resistance and cause inaccurate thermal readings.
• Shield Ground Continuity: Ground the overall enclosure frame to the main facility earth plane. Ensure the module faceplate maintains low-impedance metallic contact with the grounded rack rail assembly.