Raymarine A06028 SeaTalkNG T-Piece Connector

Raymarine A06028 SeaTalkNG T-Piece Connector

The Raymarine A06028 is a SeaTalkNG T-piece connector that creates a single spur (device) connection point on a SeaTalkNG backbone while allowing the backbone to continue in both directions. Each T-piece adds one branch where a SeaTalkNG-compatible display, instrument, sensor, or power cable can be connected — one T-piece per device attachment point. Multiple T-pieces are daisy-chained along the backbone to build out a full multi-device network.

SeaTalkNG is Raymarine’s NMEA 2000-compatible marine networking standard. The A06028 T-piece is the fundamental building block of any SeaTalkNG network expansion beyond what is included in a starter or backbone kit.

Key Features

• Adds one spur (device drop) connection point to a SeaTalkNG backbone
• Two blue backbone ports allow the network backbone to pass through to additional locations
• One white spur port for connecting a SeaTalkNG-compatible device or spur cable
• Daisy-chain multiple T-pieces to support multi-device SeaTalkNG installations
• Locking SeaTalkNG connector design — secure, waterproof connection at each port
• Compatible with NMEA 2000 devices via SeaTalkNG to DeviceNet adapter cable

Specifications

• Part Number: A06028
• Type: SeaTalkNG T-piece connector (backbone spur branch)
• Backbone Ports: 2× blue SeaTalkNG backbone connections (pass-through)
• Spur Port: 1× white SeaTalkNG spur connection (device attachment)
• Network Standard: SeaTalkNG / NMEA 2000
• Weight: approx. 70 g (2.5 oz)

How SeaTalkNG T-Pieces Work

A SeaTalkNG network consists of a backbone cable running through the vessel, with T-piece connectors inserted at each point where a device needs to connect. The two blue ports on the T-piece pass the backbone signal through to the next T-piece or to a terminator at each end. The white spur port branches off the backbone to connect one device via a spur cable. Every powered SeaTalkNG backbone must have a terminator plug at each open end — without terminators, the network will produce errors and devices may disconnect intermittently.

Compatible Applications

• Adding device connection points to an existing SeaTalkNG backbone
• Expanding a Raymarine A25062 or E22158 SeaTalkNG backbone kit installation
• Connecting Raymarine Axiom, Axiom+, and Axiom 2 Pro MFDs to a SeaTalkNG network
• Connecting Raymarine Evolution autopilot components via SeaTalkNG
• Connecting Raymarine i70s instruments, wind sensors, and speed/depth transducers
• Connecting the Raystar RS150 GPS/GNSS Receiver spur cable to the backbone
• Connecting NMEA 2000 devices via a SeaTalkNG to DeviceNet adapter cable
• Any SeaTalkNG installation requiring additional spur drop points beyond those included in a starter or backbone kit

SeaTalkNG Network Topology Notes

• One T-piece per device: Each device connected to the network requires its own T-piece spur port. Plan T-piece count based on the number of devices to be connected.
• Terminators required: Both ends of the backbone must have a terminator plug installed. See the A06031 SeaTalkNG Backbone Terminator.
• Backbone cable between T-pieces: T-pieces are connected to each other by backbone cable segments — see the A06033 SeaTalkNG Backbone Cable (400 mm) for short runs between adjacent T-pieces.
• Spur cables to devices: The spur port on each T-piece connects to the device via a spur cable of appropriate length — see the A06040 SeaTalkNG Spur Cable (3 m).
• Network power: The SeaTalkNG backbone requires a dedicated power cable (included in backbone kits). Devices draw power from the backbone via their spur connection.

Technical FAQ

• How many T-pieces do I need? One T-piece per device being connected to the network. Count every device that will have a spur connection — chartplotter, autopilot, GPS receiver, instruments, wind sensor, depth transducer — and order one A06028 per device, plus additional backbone cable to span between them.
• Do I need backbone cable between T-pieces? Yes. T-pieces connect to each other via backbone cable segments. The A06028 T-piece itself does not include backbone cable. Short inter-T-piece runs typically use the A06033 (400 mm); longer runs between locations use longer backbone cable from the A25062 backbone kit.
• Is this compatible with NMEA 2000 devices? Yes, via a SeaTalkNG to DeviceNet adapter cable. SeaTalkNG uses the same electrical standard as NMEA 2000 but with Raymarine’s proprietary connector format. The adapter cable bridges the two connector types.
• Can I use this with an Ancor or Garmin NMEA 2000 backbone? The A06028 T-piece uses SeaTalkNG connectors and is designed for SeaTalkNG backbones. For connection to a Micro-C NMEA 2000 backbone, the A06045 DeviceNet-to-SeaTalkNG spur adaptor may be the more direct approach.

Related SeaTalkNG Components

• Raymarine A06031 — SeaTalkNG Backbone Terminator — required at both ends of the backbone
• Raymarine A06033 — SeaTalkNG Backbone Cable, 400 mm — short inter-T-piece runs
• Raymarine A06040 — SeaTalkNG Spur Cable, 3 m — device-to-T-piece spur cable
• Raymarine A25062 — SeaTalkNG Backbone Kit — complete starter with backbone cable, T-pieces, terminators, and power cable
• Raymarine E22158 — SeaTalkNG Backbone Kit
• Raymarine T70134 — SeaTalkNG Starter Kit
• Raymarine A06076 — SeaTalkNG to DeviceNet (Male) Adaptor Cable, 1 m
• Raymarine A06045 — NMEA 2000 (DeviceNet Female) to SeaTalkNG Spur Adaptor Cable, 400 mm

Parts Desk Insights

Best Use Case: The A06028 is the go-to part when a customer is expanding an existing SeaTalkNG backbone and needs to add one or more additional device connection points — most commonly when adding a new instrument, GPS receiver, or autopilot component to a network that was originally built with the minimum number of T-pieces for the initial installation. Order one per device being added, plus matching backbone cable and spur cables to complete each connection.

Common Issues: The most frequent network problem after adding T-pieces is forgetting to re-terminate the backbone. Any time the backbone is reconfigured — T-pieces added, backbone cable extended, or the network layout changed — both ends must have terminator plugs installed. A missing or misplaced terminator is the leading cause of intermittent device dropouts and NMEA network errors after an expansion. Also confirm device-to-T-piece spur cable lengths before ordering — spur cables are not included with the T-piece and must be ordered separately based on the distance from the T-piece to each device.