Product Details
The Honeywell 51404391-375, also cataloged as the 51404391-375 Serial Interface Module, operates as a dedicated hardware component for bi-directional serial data communication and logic signal processing within Honeywell TDC 3000 and Experion PKS DCS platforms. Interfacing directly with system backplane buses, the module processes multi-rail power logic and signal current loops, drawing 1.0 Amp at 3.3 VDC, 1.3 Amp at 5.1 VDC, 4 mA at 24 VDC, and 5.6 mA at 1.2 VDC. Internal processing components execute protocol management and serial data conversion across local process controller networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 51404391-375 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 2.00 lbs (0.91 kg) |
| Dimensions | Standard DCS Rack Card Profile |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Multi-rail: 1.0 A @ 3.3 VDC, 1.3 A @ 5.1 VDC, 4 mA @ 24 VDC, 5.6 mA @ 1.2 VDC |
| Primary Interface | Serial Communication Bus |
| Module Category | Serial Interface PLC Module |
| Mounting Type | Rack Mount / Card Chassis |
Channel-to-Channel Isolation
The 51404391-375 serial interface board incorporates galvanic channel-to-channel isolation barriers between internal processor logic circuits and external serial communication loops. High-speed optical isolators decouple transmit and receive lines to prevent ground potential variations from causing data corruption. This isolated physical architecture attenuates common-mode noise surges and voltage spikes along serial lines, safeguarding sensitive backplane transceivers during high-density field data transfers.
Frequently Asked Questions
Q: Can the 51404391-375 module be hot-swapped while the DCS rack backplane is energized?
A: Hot-swapping depends on host controller chassis capabilities, but field practice requires disabling active serial communication links prior to card extraction to prevent logic bus errors.
Q: How are power rail requirements supplied to the 51404391-375 card?
A: All required operating voltages (3.3 VDC, 5.1 VDC, 24 VDC, and 1.2 VDC) are drawn directly from the system backplane power distribution bus via edge connector terminals.
Q: What indicates proper chassis ground bonding for the serial communication shield?
A: Ground continuity is achieved via metallic faceplate retention latches and card guide grounding clips contacting the grounded rack enclosure frame.
Field Installation Guidelines
- Power down the targeted rack chassis section or verify proper redundancy switchover state before inserting or removing the module.
- Align the board card edges with the plastic chassis guide tracks, pressing firmly until edge connectors seat into the backplane receptacle.
- Tighten top and bottom faceplate retention screws by hand to ensure structural stability and low-impedance grounding.
- Route serial communication cables through dedicated low-voltage wiring channels away from AC power distribution lines.
- Ground overall cable shielding to the main cabinet earth bus bar at a single point to prevent ground loop noise coupling.
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.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- 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.
Tech & Buying Guide
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