Description
Product Technical Parameters
| Feature | Specification |
|---|---|
| Brand | JRC (Japan Radio Co., Ltd.) |
| Model | CQD-1250 |
| Part Number | CQD-1250 |
| Device Category | Connection / Terminal Interface Board |
| Application | Marine GMDSS / Inmarsat-C Systems |
| Terminal Type | Screw-down / Spring-clamp terminals |
| Signaling | RS-232 / RS-422 / NMEA 0183 |
| Construction | Corrosion-resistant marine-grade PCB |
Product Datasheet
| Attribute | Details |
|---|---|
| Dimensions | 16.5 cm x 11.0 cm x 2.1 cm |
| Weight | 0.38 kg (approx. 0.84 lbs) |
| Country of Origin | Japan |
| Operating Temperature | -15°C to +55°C |
| Storage Humidity | Up to 95% non-condensing |
| Mounting | Internal chassis / Bracket mount |
| Compliance | IMO, MED, and GMDSS Standards |
Application Fields
The CQD-1250 is a specialized interconnection board used within Japan Radio Co. maritime equipment. Major applications include:
- Inmarsat-C Mobile Earth Stations (e.g., JUE-85 series)
- GMDSS Radio Consoles
- Marine Data Terminal Displays
- Shipborne Communication Control Units
- Interfacing bridge equipment with peripheral sensors
Product Instructions
- Installation: Ensure the main power to the communication terminal is switched off. Mount the CQD-1250 onto the internal chassis standoffs, ensuring all grounding points are properly making contact with the frame.
- Wiring: Connect the multi-core communication cables to the terminal blocks according to the wiring diagram provided in the JRC equipment manual. Use ferrule terminals for stranded wire to ensure long-term vibration resistance.
- Signal Verification: Check the NMEA or RS-232 data lines for correct polarity. Incorrect wiring of data (+) and (-) lines may result in communication failure between the terminal and the transceiver.
- Maintenance: Inspect the terminal screws periodically for tightness, especially after vessel transit in heavy seas. Check for any signs of salt-air corrosion on the copper traces.
Product Q&A
Q: What is the primary role of the CQD-1250 in an Inmarsat-C system? A: It acts as the central wiring hub, connecting the data terminal (DTE) to the transceiver, power supply, and peripheral devices like GPS sensors or distress buttons.
Q: Is this board compatible with modern JRC JUE-87 systems? A: The CQD-1250 is typically associated with legacy series like the JUE-85. While some terminal boards look similar, you must verify the specific pinout configuration before attempting to use it in newer JUE-87 hardware.
Q: How do I troubleshoot a “Terminal Communication Error” related to this board? A: First, check the continuity of the cables connected to the CQD-1250. Ensure the board’s internal fuses (if present) are intact and that there is no oxidation on the connection pins.
Q: Can the CQD-1250 be used for external NMEA 0183 distribution? A: Yes, it often serves as the physical interface for NMEA 0183 signals, allowing the terminal to receive GPS coordinates from the ship’s master clock or gyrocompass.
Similar Models Recommendation
- JRC CQD-1251
- JRC CQD-1022
- JRC CMN-252
- JRC CMC-1250
- JRC CFQ-5917
