Terasaki ECA-306 Multiplex TM Receiver PCB Card

Product Information

Manufacturer	TERASAKI (Terasaki Electric Co., Ltd.)
Model / Card Name	ECA-306
Card Type (printed on PCB)	MULTIPLEX TM RECEIVER
Part Number (K-number)	Not clearly visible in the supplied photograph (market listings show K/827/6-001 and K/827/6-001A – not verified for this card)
Numbers Printed on PCB	95082, 14
Main ICs (visible)	Toshiba TC4508BP (marked JAPAN 9522H), TC4070BP, TC4018BP, TC4015BP, TC4028BP; NEC ICs; 8 opto-couplers PC1–PC8
Serial Number	Not clearly visible in the supplied photograph
Country of Manufacture	Not clearly visible on the PCB (Toshiba IC marked JAPAN; Terasaki is a Japanese manufacturer)
Condition	New
Supplier	SM MARINE SERVICE™, Chattogram, Bangladesh

Product Introduction

The Terasaki ECA-306 Multiplex TM Receiver is a plug-in PCB card from Terasaki marine control electronics. It receives multiplexed signals and decodes them through Toshiba CMOS logic, latches and eight opto-coupler outputs. SM MARINE SERVICE™ supplies this card as a refurbished replacement for ship owners, ship managers and marine electricians worldwide. Visit https://www.smmarineservice.com/ for more marine automation and navigation spare parts.

What Is This Equipment?

ECA-306 is a rack card with a single gold-plated edge connector (pins 1R–22R). In a multiplex system, many signals are sent over a few wires by a sender card and separated again by a receiver card. ECA-306 is the receiver side: it decodes the multiplexed TM signal and drives isolated outputs through opto-couplers PC1–PC8.

The exact Terasaki system and the meaning of "TM" in this system were not verified from manufacturer documentation. Terasaki ECA-series cards are commonly found in shipboard switchboard and generator control panels.

Main Features

• Genuine Terasaki ECA-306 Multiplex TM Receiver card
• Toshiba TC4508BP dual 4-bit latch and TC4000-series CMOS logic
• Eight opto-couplers (PC1–PC8) for isolated outputs
• Diode arrays DA1/DA2 and zener diodes for protection
• On-board power resistor and 100 µF / 50 V capacitor for supply filtering
• Gold-plated edge connector for rack mounting

Terasaki ECA-306 Multiplex TM Receiver PCB card – SM MARINE SERVICE™

Main Technical Specifications

Model	ECA-306
Function	Multiplex TM signal receiver / decoder
Part Number	K/827/6-001 / K/827/6-001A (market listings) – not verified for this card
Outputs	8 opto-coupler channels (PC1–PC8)
Logic	Toshiba TC4000-series CMOS
Mounting	Plug-in rack card, edge connector 1R–22R
Supply Voltage	Not verified
Dimensions / Weight	Not verified

Inside the Unit: PCBs, Modules & Part Numbers

The following items were read from the supplied photograph:

ECA-306 – Multiplex TM Receiver Card

The main card – receives and decodes the multiplexed signal.

Toshiba TC4508BP – Dual 4-bit Latch

Holds the decoded data (marked JAPAN 9522H).

Toshiba TC4070BP, TC4018BP, TC4015BP, TC4028BP – CMOS Logic

Exclusive-OR gates, counter/divider, shift register and decoder used for signal decoding (numbers read from the photograph).

PC1–PC8 – Opto-couplers

Eight opto-couplers giving isolated outputs. Exact type numbers are not clearly visible in the supplied photograph.

PCB markings 95082 and 14

Numbers printed on the PCB; their meaning is not verified.

Main Components & Related Units

Related Terasaki cards seen in the spare-parts market (from market listings – not verified against Terasaki documentation and not confirmed to be from the same system):

• Terasaki ECA-105 – Multiplex WTM Sender, K/765/803-0010
• Terasaki ECZ-202 – PCB card K/77Y/2-001A
• Terasaki EMW-1301 – TMA & TM Interface Module K/821/3-001B

Marine & Industrial Applications

• Terasaki switchboard and generator control panels
• Multiplexed signal transmission between panels
• Offshore vessels and industrial plants using Terasaki control electronics
• Spare card for onboard stock and emergency replacement

Close-up of ECA-306 label, Toshiba TC4508BP and opto-couplers – SM MARINE SERVICE™

Common Problems & Troubleshooting

• No output on some channels: check the related opto-coupler (PC1–PC8) and its resistors; check the field wiring.
• All outputs lost: check the multiplex signal from the sender side, the supply voltage and card seating.
• Intermittent signals: clean the edge connector, check solder joints and the 100 µF capacitor.
• Overheated area: inspect the power resistor and nearby PCB for discoloration.

Safety notes: isolate the panel before removing or inserting cards, use ESD protection, follow the permit-to-work system and the Terasaki manual. Only qualified personnel should work on switchboard equipment.

Maintenance Tips

• Keep the control rack clean, dry and ventilated.
• Inspect and clean edge connectors during planned maintenance.
• Store spare cards in anti-static bags.
• Record the K-number of every card in your rack for quick ordering.
• Keep a spare receiver card onboard for critical systems.

Spare Parts & Replacement Availability

SM MARINE SERVICE™ supplies Terasaki ECA-306 and other Terasaki PCB cards in refurbished, used and new condition, subject to confirmation. For a fast quotation please send:

• Card name and K-number (e.g. ECA-306, K/827/6-001A)
• Photos of both sides of your card
• Vessel or system name and quantity
• Delivery port or country

We ship worldwide by DHL, FedEx, UPS and other couriers, and can deliver to ships through agents in major ports.

Why This Equipment Is Still Used

Many vessels still operate Terasaki switchboards with ECA-series cards. Replacing a complete panel is costly and needs class approval, so owners replace only the failed card. A reliable supply of cards such as ECA-306 keeps these systems running safely at low cost.

Frequently Asked Questions (FAQ)

Q1. What is Terasaki ECA-306?
ECA-306 is a Multiplex TM Receiver PCB card used in Terasaki marine control and switchboard equipment. It receives multiplexed signals and converts them into individual outputs for the control system.

Q2. What is the part number of ECA-306?
Market listings show K/827/6-001 and K/827/6-001A. The K-number is not clearly visible in our photograph, so please check the label on your card.

Q3. Are K/827/6-001 and K/827/6-001A interchangeable?
Not verified. Send photos of your card and we will check before supply.

Q4. What is the matching sender card?
Terasaki ECA-105 is listed in the market as a Multiplex WTM Sender (K/765/803-0010). Whether it pairs with ECA-306 in your system is not verified.

Q5. Which ICs are on the ECA-306 board?
Visible ICs include Toshiba TC4508BP, TC4070BP, TC4018BP, TC4015BP and TC4028BP CMOS logic, NEC ICs and eight opto-couplers (PC1–PC8).

Q6. What does the number 95082 on the PCB mean?
It is printed on the board; its meaning is not verified.

Q7. Is the card tested?
Refurbished cards are inspected and cleaned before supply. Testing details are confirmed with each quotation.

Q8. Can you repair my faulty ECA-306?
Send photos and a fault description; we will advise on repair or replacement.

Q9. Do you ship worldwide?
Yes, SM MARINE SERVICE™ ships worldwide from Bangladesh and China stock locations.

Q10. How do I get a price?
Send the card name, K-number and quantity to info@smmarineservice.com or WhatsApp +88 01818 929292.

Short Product Description

Terasaki ECA-306 is a Multiplex TM Receiver PCB card for Terasaki marine switchboard and control equipment. The card receives multiplexed signals and decodes them with Toshiba TC4508BP latches and TC4000-series CMOS logic, then drives eight isolated outputs through opto-couplers PC1–PC8. It plugs into the control rack through a gold-plated edge connector. Market listings show the part number K/827/6-001 / K/827/6-001A. SM MARINE SERVICE™ supplies this card in refurbished condition as a replacement spare for ships, offshore units and industrial plants worldwide. Send your card number for a fast quotation.

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SM MARINE SERVICE™ – Marine Automation & Navigation Equipment Supplier

Available Equipment Conditions: New • Used • Refurbished • Reconditioned (Specific product condition and availability are subject to confirmation.)

Stock Locations: Bangladesh • China

Services: Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing

Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh

Mobile / WhatsApp / Viber: +88 01818 929292

Email: info@smmarineservice.com

Website: https://www.smmarineservice.com/

Need a Terasaki ECA-306 or any other Terasaki PCB? Contact SM MARINE SERVICE™ today for a quick quotation.

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