YOKOGAWA RM81*A Relay Module
The YOKOGAWA RM81*A, also cataloged as the RM81 Relay Module, operates as a dedicated hardware component for physical module termination and backplane signal routing within CENTUM VP and CENTUM CS 3000 systems. It provides mechanical retention and trace connectivity across eight I/O slots to establish continuous power distribution and high-speed data flow between inserted cards and the main control node.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RM81*A |
| Brand | YOKOGAWA |
| Origin | Japan |
| Weight | 1.5 kg |
| Dimensions | Standard CENTUM VP / CS 3000 backplane chassis layout |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | Passive system backplane board (Power distribution loss dependent on module loading) |
| Slot Count | 8 slots |
| System Compatibility | CENTUM VP, CENTUM CS 3000 |
Channel-to-Channel Isolation & Backplane Signal Integrity
The YOKOGAWA RM81*A motherboard features channel-to-channel isolation architecture across its backplane copper traces to isolate individual card channels from adjacent operational slots. This physical galvanic boundary suppresses common-mode voltage fluctuations, crosstalk, and ground loop currents that occur during parallel signal processing. Furthermore, integrated noise-filtering trace geometries preserve analog accuracy and digital frame timing when routing 4-20 mA HART loop protocol communications through field interface units.
Frequently Asked Questions
Q: Does removing or replacing a module in an individual slot disrupt backplane communication on neighboring slots?
A: No, the board maintains isolated signal lines for each slot position. However, operators must observe Yokogawa hot-swap guidelines to prevent bus transients during live insertion or removal.
Q: How does the motherboard maintain power distribution stability across all 8 populated slots?
A: Heavy-gauge copper distribution planes embedded within the multi-layer printed circuit board minimize voltage drop and maintain balanced DC supply levels under full module load conditions.
Field Installation Guidelines
Mount the YOKOGAWA RM81*A backplane unit firmly inside the target system enclosure using specified mounting fasteners. Connect the main ground lug directly to the cabinet instrument ground (IG) bus via a short, low-impedance grounding braid to divert electrostatic discharges away from sensitive system traces. Ensure all field wiring harnesses maintain proper strain relief and remain separated from high-voltage AC cables. Confirm all module slot locking latches engage fully prior to powering up the system bus.
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|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
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| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
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