Description

The GE IC694MDL940, also cataloged as the IC694MDL940 Voltage Output module, operates as a dedicated hardware component for 16-point relay output switching within PACSystems RX3i platforms.

Hardware Specifications

Backplane Bus Communication and Firmware

The module supports integration into the RX3i backplane via standard bus communication protocols, ensuring consistent synchronization with the controller scan cycle. Firmware flash compatibility allows for system-wide updates and ensures the module maintains deterministic response times during I/O exchange. The device leverages established backplane bus communication velocity to manage state transitions across its four groups of four relay outputs. The absence of on-board fuses necessitates that users implement appropriate external protection circuits to guard against load-side faults and prevent damage to the relay contact assembly.

Frequently Asked Questions

Q: Is the IC694MDL940 module capable of supporting hot-swapping within an active RX3i rack?

A: Yes, this module supports hot-swapping, allowing for removal or insertion into the RX3i backplane without requiring a complete system power-down, provided the I/O bus is properly configured.

Q: Are the relay outputs internally fused?

A: No, the module does not include internal channel-level fusing. External fusing must be installed on the field side to protect the relay contacts from overcurrent and short-circuit conditions.

Field Installation Guidelines

• Secure the module into the RX3i rack slot by aligning the backplane connectors; ensure the retaining screws are tightened to provide a stable electrical and mechanical connection.
• Connect field wiring to the removable terminal block according to the established wiring diagrams; verify that wire sizing complies with current-carrying requirements for the specific load.
• Confirm that the 24 VDC bus supply is within operational limits before energizing the module to prevent premature contact degradation.
• Monitor channel status via the front-panel LEDs to verify correct output command execution during initial commissioning.
• Ensure adequate ventilation around the RX3i rack to maintain operating temperatures within the specified environment ratings, as relay operation generates localized thermal energy.