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.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
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- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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