Foxboro P0903CW I/A Series Annunciator Numeric Keyboard

Foxboro P0903CW Annunciator Keyboard

The Foxboro P0903CW, also cataloged as the P0903CW Annunciator Keyboard, operates as a dedicated hardware interface component for alarm status monitoring and operator-driven command execution within I/A Series control system platforms.

Hardware Specifications

I/A Series Integration and Operator Interface

The P0903CW module provides direct physical feedback through its 32 LED/switch pairs, functioning as a local hardware annunciator. Each pair is hardwired to the I/A Series backplane or communication module, allowing the controller to trigger state-based status indicators (e.g., alarm active, point normal, or trip status). The integrated numeric keypad enables synchronous command input, allowing operators to acknowledge alarms or adjust setpoints directly at the console without latency associated with network-based soft-interfaces. The unit maintains galvanic isolation between the operator tactile interface and the controller's internal logic bus, ensuring that transient signals from the panel environment do not propagate into the I/A Series processor assemblies.

Frequently Asked Questions

Q: Does the 9-pin connector support standard RS-232 serial communication?

A: The 9-pin connector is configured for specific I/A Series proprietary bus signals rather than standard RS-232 serial data protocols. Direct connectivity requires an I/A Series compatible interface port or controller card designed for this specific operator station bus.

Q: Can the LED/switch pairs be remapped via software?

A: The mapping of the 32 LED/switch pairs is typically managed within the I/A Series control configuration software. Logic changes in the controller database dictate which alarm point or system state activates a specific LED or processes an input from a specific switch.

Field Installation Guidelines

• Panel Cutout Integrity: Ensure the control panel cutout matches the specified chassis dimensions of the P0903CW. Use a vibration-resistant gasket to maintain the IP-rated seal of the operator station.
• Grounding and Shielding: Connect the internal chassis ground lug directly to the cabinet main earth bar. Use shielded cabling for the 9-pin interface connection to minimize induced noise in high-EMI environments.
• Mounting Torque: Tighten panel-mounting clips in a cross-pattern to ensure uniform pressure against the mounting surface, preventing deformation of the keyboard frame or internal switch matrix.
• Cable Strain Relief: Utilize cable ties to secure the 9-pin interface cable within the cabinet, preventing mechanical tension from pulling on the connector pins during maintenance or panel door movement.