Product Details
The Honeywell 51301877-100, also cataloged as the 51301877 RTD Relay Multiplexer Board, operates as a dedicated hardware component for switching temperature sensor inputs within Honeywell Process Interface Unit (PIU) systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 51301877-100 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 20 lbs (9.07 kg) |
| Dimensions | Standard Honeywell High-Density Rack Assembly |
| Operating Temp | 0 deg C to 60 deg C |
| Power Consumption | System backplane powered via LEPIU CCFA chassis |
| Sensor Type | 100-ohm Platinum RTD |
| Channel Capacity | Up to 16 input channels |
| Target Integration | Low Energy PIU (LEPIU) CCFA assembly |
| Terminal Board Compatibility | Honeywell 51301882-100 Terminal Board |
Channel Isolation and Resistance Signal Conditioning
The 51301877-100 employs relay switching logic to multiplex up to 16 separate 100-ohm platinum RTD sensor loops into a single Low Energy PIU CCFA measurement interface. The board provides channel-to-channel isolation and three-wire lead resistance compensation across all input channels. This suppresses common-mode voltage spikes and crosstalk across field wiring, maintaining accurate resistance-to-temperature signal conditioning before analog conversion by downstream system electronics.
Frequently Asked Questions
Q: What specific terminal board must be paired with the 51301877-100 module?
A: The 51301877-100 is designed to mate directly with the Honeywell 51301882-100 terminal board for field wiring termination.
Q: Can the 51301877-100 multiplex sensor inputs other than 100-ohm platinum RTDs?
A: The signal multiplexing paths and lead resistance balancing circuits are optimized for 100-ohm platinum RTD characteristics; non-matching sensors can introduce calibration errors.
Q: Is hot-swapping supported for this multiplexer board during system operation?
A: Removal or insertion of the board should only occur when the associated PIU slot or chassis power is de-energized to prevent contact arcing across the relay contacts.
Field Installation Guidelines
- Verify that backplane power to the target LEPIU chassis is isolated before inserting the multiplexer assembly.
- Ensure proper mechanical alignment with the 51301882-100 terminal board connectors to prevent bending backplane contacts.
- Connect all RTD field cable shields to the dedicated cabinet system ground bus to minimize noise interference on low-level resistance signals.
- Route RTD input wiring in separated, grounded metallic conduits away from AC power distribution lines and high-current switching devices.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
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- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
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- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Comprehensive Guide to Instrumentation and Control (I&C) Design Basis
Instrumentation and Control (I&C) Design Basis serves as the foundational technical document for modern plant engineering. Project teams rely on this master specification to govern engineering deliverables across front-end engineering design (FEED) and detailed execution phases. A well-constructed I&C design basis ensures seamless integration among field instrumentation, safety systems, and main control systems. Furthermore, establishing clear technical standards early mitigates execution risks and prevents costly re-engineering during plant commissioning.
The Shift to Flexible IO Modules in Modern Industrial Automation
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DCS Commissioning Steps in Industrial Automation Projects
Commissioning a Distributed Control System (DCS) represents a crucial milestone when deploying modern process automation infrastructure. Field engineers must execute systematic verification steps to transition complex control hardware from static installation to dynamic plant control. Proper commissioning ensures that controllers, I/O modules, network switches, and HMI software operate in strict compliance with engineering design specifications before introducing live process fluids.