Product Details
Configured for field signal processing and bus data exchange in Yokogawa control systems, the Yokogawa LC81*B (LC81 Interface Module Card) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
- LC81: Base module code designating the RL-Bus interface card architecture.
- *B: Revision suffix specifying internal PCB layout and circuit component designator level.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | LC81*B |
| Brand | Yokogawa |
| Origin | Japan |
| Module Type | RL-Bus Interface Card |
| Analog Input Range | 4 to 20 mA |
| Power Supply Voltage | 12 to 36 V DC |
| Weight | 0.5 kg |
| Dimensions | Standard Yokogawa Interface Card Chassis |
| Operating Temp | -20 to +85 deg C |
| Power Consumption | Passive bus backplane load (governed by 12 to 36 V DC input) |
Yokogawa Loop Protocol & Channel Isolation
The LC81*B interface card conditions 4 to 20 mA analog input signals across its hardware channel array while executing data serialization over the RL-Bus link. Integrated galvanic isolation barriers mitigate common-mode noise propagation between field instrument circuits and internal system backplane logic. The module architecture maintains channel-to-channel isolation parameters to isolate digital 4-20 mA HART loop protocol signals from ambient high-frequency electrical interference.
Frequently Asked Questions
Q: What power supply range supports stable execution of the LC81*B interface module card?
A: The board operates across an input voltage window of 12 to 36 V DC, accommodating nominal 24 V DC field loop power configurations.
Q: Can the LC81*B process analog input signals below 4 mA without triggering signal fault conditions?
A: The input circuitry continuously digitizes the full 4 to 20 mA range; values dropping significantly below 4 mA trigger live open-circuit diagnostic flags within the controller memory map.
Field Installation Guidelines
Align the LC81*B card with the designated rack slot guide rails and push firmly until the rear connector seats into the RL-Bus backplane interface. Fasten top and bottom faceplate retention screws to ensure continuous chassis grounding and structural stability. Ensure field wiring for 4 to 20 mA analog loops uses twisted-shielded pairs, grounded at a single earth bus terminal inside the control cabinet to eliminate ground loops.
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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