Terasaki ECA-804, EMI-501, EIH-222 & ESZ-205 Marine Control PCB Cards

Terasaki ECA-804, EMI-501, EIH-222 & ESZ-205 Marine Control PCB Cards – New

Product Information

Product Introduction

SM MARINE SERVICE™ (https://www.smmarineservice.com/) supplies this set of new Terasaki ECA-804, EMI-501, EIH-222 and ESZ-205 plug-in PCB cards. These Japanese-made boards belong to the Terasaki card-rack family of marine electronic control cards installed in ship switchboards and engine-room control systems. Each card slides into a card rack and connects through a gold-plated edge connector, with a white front panel, ejector knobs and indicators on the front.

Ship owners, superintendents and electrical officers often search for a single failed card by its model or assembly number. This page lists every code visible on the four boards so you can match your spare quickly and request a quotation.

What Is This Equipment?

These are rack-mounted electronic control cards made by Terasaki. The front-panel labels show their individual roles:

• ECA-804 – "TM Master Unit" printed on the PCB; front panel shows UNIT No. LEDs (1, 2, 4, 8, 16, 32, 64), ABNOR. L / C / U LEDs, NOR. LED and an ABNOR. RESET button.
• EMI-501 – "TM-TMPLC Interface 1" card.
• EIH-222 – "Speed Matcher" card with UP / DOWN LEDs and a GOV. CHARACT. adjustment (scale marked 2 – 18 S/Hz).
• ESZ-205 – card with a "SENS. FAIL ALM. INH." (sensor fail alarm inhibit) toggle switch. The front panel print reads like "E8Z-205" while the PCB is printed ESZ-205.

The exact system in which these cards are installed (for example a generator control, power management or engine monitoring rack) is not stated on the boards and is not verified. Please compare the model and assembly number with your existing card.

Main Features

• Genuine Terasaki plug-in card design with gold-plated edge connector
• Front panel with ejector knobs for easy rack insertion and removal
• Status LEDs and operator controls on ECA-804, EIH-222 and ESZ-205
• Japanese CMOS logic ICs (Toshiba TC40xx series, NEC) on ECA-804 and EMI-501
• Board and assembly numbers printed on the PCB for exact identification
• Supplied as a set or individually – subject to confirmation

Terasaki ECA-804, EMI-501, EIH-222 and ESZ-205 card front panels

Main Technical Specifications

Supply voltage, power rating and serial numbers: Not clearly visible in the supplied photograph.

Inside the Unit: PCBs, Modules & Part Numbers

Terasaki ECA-804 – TM Master Unit PCB (K/765/71-001C)

Master/logic card printed "TM MASTER UNIT". It carries Toshiba TC4040BP, TC4013BAP, TC4510BP, TC4071BP, Motorola MC14076B and NEC ICs, plus a reset push button and unit/abnormal indication LEDs on the front.

Terasaki EMI-501 – TM-TMPLC Interface 1 PCB (K47874/7-001A)

Interface card with opto-couplers, NEC D4001BC, Toshiba TC4082BP, TC4073BP, TC4071BP, TC4528BP, TC4510BP and TC4013BAP logic ICs. Some market listings show the number as K/787/17-001A – not verified; please match the number printed on your board.

Terasaki EIH-222 – Speed Matcher PCB (K/762/622-001A)

Analogue/logic card with metal-can transistors, NEC and Toshiba ICs, an adjustable trimmer (VR1) and a front-panel governor characteristic setting. A related card is EIH-221 (K/762/621-001A).

Terasaki ESZ-205 – Sensor Fail Alarm Inhibit PCB (K/804/3-001)

Simple jumper/resistor card with J1–J5 jumper positions and a front toggle switch used to inhibit the sensor-fail alarm.

Main Components & Related Units

Other Terasaki plug-in cards from the same card family that are often requested together (not part of this set): ECA-105, ECB-121, ECB-131, ECB-901, ECD-531, EIH-221, EMI-103, EMI-201, ERB-112, ERB-324, ERB-454, ERC-232, ERC-233, ESM-103K, EMV-2651, EMW-1101A and EMW-1301C. Availability of these cards is subject to confirmation.

Marine & Industrial Applications

• Ship main switchboard and generator control card racks
• Engine-room control and monitoring card racks
• Bulk carriers, tankers, container vessels, LNG/LPG carriers and offshore vessels with Terasaki equipment
• Shore power plants and industrial installations using Terasaki rack cards

Terasaki ECA-804 TM Master Unit PCB

Terasaki EMI-501 TM-TMPLC Interface 1 PCB

Terasaki EIH-222 Speed Matcher PCB

Terasaki ESZ-205 PCB

Common Problems & Troubleshooting

• Card not responding / no LED: check rack supply voltage and edge connector seating; clean gold contacts with a suitable contact cleaner.
• Abnormal LED on ECA-804: note which L / C / U LED is lit, check related field signals and wiring, then try ABNOR. RESET.
• Speed matching not working (EIH-222): check UP/DOWN LED response, governor signal wiring and GOV. CHARACT. setting against the ship's records.
• Repeated sensor fail alarm: check the sensor and its wiring before using the inhibit switch on ESZ-205.
• Intermittent faults: look for dry solder joints, aged capacitors or loose connectors.

Safety note: isolate power before removing or inserting cards, use ESD protection, and follow the ship's switchboard safety procedures. Do not change settings without checking the original setting values.

Maintenance Tips

• Keep spare cards in anti-static packing in a dry place.
• Record jumper and trimmer settings before replacement and copy them to the new card.
• Keep card racks clean and check rack ventilation.
• Test spare cards periodically during planned maintenance.

Spare Parts & Replacement Availability

SM MARINE SERVICE™ can supply the Terasaki ECA-804, EMI-501, EIH-222 and ESZ-205 cards and help source related Terasaki PCBs. For a fast quotation, please send:

• Card model (e.g. ECA-804) and assembly number (e.g. K/765/71-001C)
• Photos of the board and front panel
• Quantity required and vessel name / IMO number (optional)
• Delivery port or address

We ship worldwide by courier and air freight.

Why This Equipment Is Still Used

Many vessels still run Terasaki card-rack control systems because they are reliable and deeply integrated in the switchboard. Replacing a single failed card is far cheaper and faster than replacing a full system, so exact-match spare cards remain in high demand.

FAQ

Q: Who manufactures the ECA-804, EMI-501, EIH-222 and ESZ-205 cards?
A: Terasaki Electric Co., Ltd. of Japan (marked "TERASAKI" on each PCB).

Q: What is the assembly number of the ECA-804?
A: The board shows K4765471-001C; it is commonly listed as K/765/71-001C.

Q: What is the EIH-222 part number?
A: K/762/622-001A (printed K7762/622-001A).

Q: What is the EMI-501 part number?
A: The board shows K47874/7-001A. Some listings show K/787/17-001A (not verified).

Q: What is the ESZ-205 part number?
A: K/804/3-001.

Q: Is ESZ-205 the same as E8Z-205?
A: The front panel print looks like "E8Z-205" while the PCB reads ESZ-205; it is the same card in these photos.

Q: Are these cards new?
A: Yes, the cards shown are new. Availability is subject to confirmation.

Q: Can I buy one card instead of the full set?
A: Yes, please ask for individual cards in your quotation request.

Q: Do you supply other Terasaki PCB cards?
A: Yes, we can help source cards such as EIH-221, EMI-103, ECB-121 and ERB-112 – subject to confirmation.

Q: Do you ship worldwide?
A: Yes, SM MARINE SERVICE™ ships to ports and addresses worldwide.

Short Product Description

New Terasaki ECA-804 (TM Master Unit, K/765/71-001C), EMI-501 (TM-TMPLC Interface 1, K47874/7-001A), EIH-222 (Speed Matcher, K/762/622-001A) and ESZ-205 (Sensor Fail Alarm Inhibit, K/804/3-001) plug-in PCB cards from Japan. These rack-type control cards are used in Terasaki marine switchboard and engine-room control systems. SM MARINE SERVICE™ supplies the full set or individual cards, with worldwide shipping and technical support. Send us your card model, assembly number and photos for a fast quotation.

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/

Contact SM MARINE SERVICE™ today for a quotation on Terasaki ECA-804, EMI-501, EIH-222 and ESZ-205 PCB cards.