GDACS IO POWER SUPPLIES

GDS Notes

• Estimated value: No budget/value provided; offerors to propose pricing
• Bid bond required: No
• Mandatory site visit: Yes
• Local integrator required: No
• Construction beyond panels: No
• PLC details: The power supplies are for use on OPTO22 EB-2 A/D processors, which are components often used with PLCs or RTUs. The document does not explicitly mention PLCs or RTUs by brand or model, but refers to 'GDACS RTU 5.1VDC Power Supplies'.
• HMI details: HMI/SCADA is implied as the GDACS system is a SCADA system, but no specific HMI/SCADA software is mentioned.
• Comms details: Network infrastructure mentioned but specific media/protocols not detailed. The document refers to the GDACS SCADA system, implying a network, but doesn't specify communication details.
• Request existing site list (pump stations, wells, tanks), I/O counts, and alarm philosophy before proposing cutover.
• Confirm PLC platform, firmware, programming environment, and whether standard libraries/naming conventions are required.

Integration Checklist

• Confirm existing site inventory, I/O counts, and any required standards (tagging, alarms, naming).
• Request current drawings, network diagrams, and as-built documentation (or plan for discovery).
• Define acceptance testing: FAT/SAT steps, cutover plan, and rollback expectations.
• Confirm PLC platform, programming environment, licensing, and source code handoff requirements.
• Clarify communications path, latency constraints, polling rates, and any coverage/path study requirements.
• Align with O&M workflows: alarms, reporting, compliance needs, and on-call response expectations.

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