Honeywell TK-PRR021 | 24VDC C200 Redundancy Module

Description

The TK-PRR021 is identified as a Redundancy Module (RM) supporting C200 controller redundancy. Available technical records list approximately 90 mA current draw at 24 VDC and specify that the module occupies two chassis slots.

3. Key Technical Specifications

*Some secondary technical records publish these environmental specifications; verify the exact revision against the applicable Honeywell documentation before using them for engineering approval. The core identification and C200 redundancy function are consistently documented across available records.

4. Product Introduction (Anti-Template)

When a Honeywell C200 controller is configured for redundant operation, the redundancy module becomes part of the hardware path that allows the controller architecture to maintain availability when a primary control component encounters a fault. The TK-PRR021 is identified specifically as the C200 Redundancy Module, with the ordering number 51309288-275.

This is not a conventional I/O card. Its job is tied directly to controller redundancy, so the surrounding chassis arrangement matters. The module occupies two chassis slots, and the existing C200 redundancy configuration should be checked before replacement. Honestly, confirming the original chassis arrangement first is much safer than treating TK-PRR021 as a generic Honeywell plug-in module.

5. QC, Procurement & Logistics SOP

1. Inbound Verification
   Verify the complete identification: TK-PRR021 / 51309288-275. Check the product label, revision marking, chassis connector, housing, PCB condition, and any visible manufacturing information. Some records also identify the module as TC-PRR021, so the original nameplate should be used to establish the exact supplied configuration.
2. Live Rig Testing
   Where a compatible Honeywell C200 test environment is available, verify module initialization, redundancy status, controller recognition, diagnostic indications, and communication with the associated redundant controller hardware. A basic power test alone does not confirm correct redundancy operation.
3. QA & Anti-Static Packaging
   The module should be handled using ESD precautions. Protect the backplane connector and housing from impact, then immobilize the unit inside anti-static packaging and shock-absorbing material. This is particularly important for international air freight.
4. Global Logistics & Export Compliance
   Export documentation should identify the item as a Honeywell TK-PRR021 C200 Redundancy Module, part number 51309288-275. HS classification should be reviewed according to the actual declared function and destination customs requirements. For urgent DCS maintenance, air freight is generally the practical option; sea freight can be considered for planned shipments.

6. Technical Pitfalls & Integration Warnings

1. Controller Redundancy Configuration Mismatch
   TK-PRR021 is specifically associated with C200 redundancy. Installing it into a non-redundant configuration does not automatically create a redundant controller system. The complete chassis and controller architecture must support the required redundancy arrangement.
2. Hardware Revision Mismatch
   Legacy Honeywell systems can contain different hardware revisions. A replacement should be checked against the existing controller firmware, chassis configuration, and system release. Do not assume that every visually identical TK-PRR021 revision is interchangeable.
3. Chassis Slot Arrangement
   The module uses two chassis slots. Before replacement, document the original module position and surrounding controller arrangement. If the new installation does not reproduce the required hardware architecture, the controller may report redundancy or initialization faults.
4. ESD During Unboxing
   The redundancy module contains sensitive electronic circuitry. Keep it inside the anti-static packaging until installation, ground the technician and cabinet appropriately, and avoid touching the backplane connector contacts.

7. Frequently Asked Questions (FAQ)

Q1: “What is Honeywell TK-PRR021 used for?”

TK-PRR021 is a Redundancy Module designed to support C200 controller redundancy in Honeywell control systems. It is not a standard analog or digital I/O module.

Q2: Is 51309288-275 the same part as TK-PRR021?

Yes. Available product records identify 51309288-275 as the ordering/part number associated with TK-PRR021. For procurement, use both identifiers together.

Q3: “I found TC-PRR021 instead of TK-PRR021. Are they related?”

Yes, some technical records identify the same 51309288-275 hardware using TC-PRR021 / TK-PRR021 terminology. Because naming can vary between documentation and product records, the safest approach is to compare the complete part number, revision, and nameplate before substitution.

Q4: Can I hot-swap the TK-PRR021?

Do not assume that the redundancy function makes every replacement procedure safe under power. Although redundant C200 architectures are intended to improve availability, module replacement should follow the applicable Honeywell maintenance procedure and the site’s approved process-safety procedure.

Q5: “How much current does the module consume?”

The documented values include approximately:

• 90 mA at 24 VDC
• 1.0 A at 5 VDC
• 0.75 A at 3.3 VDC
• 0.007 A at 1.2 VDC

These values should be used together with the applicable system power-budget documentation when checking chassis loading.

Q6: How much does TK-PRR021 weigh?

Available technical records give a net weight of approximately 0.45 kg. One supplier lists approximately 0.46 kg, while other product records list 0.45 kg. The final shipping weight will be higher after anti-static packaging, cushioning, and the export carton are added.

Q7: “What information should I send before ordering a replacement?”

Please provide:

• Existing TK-PRR021 nameplate photo
• Complete part number
• Hardware revision
• C200 controller model
• Chassis model and configuration
• Existing redundancy arrangement
• Firmware/system version, if available
• Quantity required
• Destination country
• Required delivery date

For this part, the existing C200 redundancy architecture is critical. Matching only “TK-PRR021” without checking the controller and chassis configuration can lead to an incorrect replacement.

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