Terasaki EIH-221, EMI-301 & EMI-502 Marine PCB Cards

Terasaki EIH-221, EMI-301 & EMI-502 Marine PCB Cards

SM MARINE SERVICE™ offers three new Terasaki plug-in PCB models for marine electrical control spare-part enquiries. The EIH-221 is a synchronism detector, the EMI-301 is an output interface, and the EMI-502 is identified as TM-TMPLC Interface 2. Each board has its own model and printed PCB marking. Quote both when requesting a replacement.

Manufacturer and brand origin

Terasaki Electric Co., Ltd. is a Japanese manufacturer headquartered in Osaka. Its marine portfolio includes shipboard power distribution, switchgear, and control and monitoring systems. Japan identifies the brand's home country. The manufacturing country of a specific unit should be confirmed from its own label or documentation.

Model and PCB identification

EIH-221 Synchro Detect PCB

The EIH-221 is identified as a synchro detector. In a generator paralleling system, synchronism detection checks whether the electrical conditions are suitable for connecting an incoming generator to an energized bus. Voltage difference is one factor in that decision. The EIH-221 faceplate has CLOSE and VOLT DIFFER. indicators, plus VOLT DIFFER. and ZERO ADJ. adjustments. Use the installed panel drawings to verify how the card's close signal is wired and which settings apply to that installation.

EIH-221 component side and printed PCB marking.

EMI-301 Output Interface PCB

The EMI-301 is marked OUTPUT INTERFACE. An output interface provides a path from control logic to circuits elsewhere in a panel. The exact output assignments depend on the wiring diagram. For a replacement enquiry, compare the K/787/11-001A board marking, edge connector and card-slot designation, and provide the drawing reference for the affected output circuit if available.

EMI-301 component side, edge connector and board marking.

EMI-502 TM-TMPLC Interface 2 PCB

The EMI-502 is marked TM-TMPLC INTERFACE 2 and has a TM ABNOR. indicator on the faceplate. The designation identifies its interface role within the associated control system. Confirm the matching rack and slot, connector layout, PCB marking and any labels on socketed components when ordering. Refer to the vessel's documentation for signal assignments and the meaning of the abnormal indication in that panel.

EMI-502 component side with the model label and PCB marking.

Replacement and compatibility

These Terasaki marine PCB cards can be specified by vessel technical teams, ship management companies, shipyards and marine electrical service providers sourcing spares for installed equipment. Compare the complete board code including its final suffix, the faceplate text and the slot identification. A matching connector alone does not establish electrical compatibility. The ship's panel documentation should confirm any approved alternative board or revision.

Request a quote for new Terasaki PCB cards

Send the required model and quantity, clear photos of the existing PCB and faceplate, the panel nameplate, and the delivery city or port. For international enquiries, include the required delivery date so SM MARINE SERVICE™ can check the available shipping options.

SM MARINE SERVICE™
Chattogram, Bangladesh
www.smmarineservice.com
info@smmarineservice.com
WhatsApp +880 1818 929292