Garmin GLADIATOR TR-1 Installation Setup Manual

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Garmin GLADIATOR TR-1 Installation Setup Manual Manual pdf 21 page image

21The TR-1 Autopilot is designed in conformance with the NMEA 0183 standard. The TR-1 willcommunicate reliably and safely when connected to other devices that meet this standard with thenormal wire connections. Some manufacturers imply that they conform to the standard when in factthey do not. Any device that requires a signal connection to ships ground is not in compliancewith the standard. The installer needs to confirm that connections to non-compliant devices are wiredin a fashion to ensure a safe and effective connection. In these cases the following procedure shall befollowed.An indication that a device may be a non-compliant device is that the GPS signal is accepted by theTR-1, but the RADAR shows no heading data, or has an intermittent heading input signal.When connecting the NMEA heading output to a non-compliant NMEA device, the NMEA positivesignal from the TR-1 shall be connected to the receiver NMEA positive signal. The connection shouldthen be tested to see if communications have been established, that is to say, does the intended receiverindicate that valid heading data is being received from the TR-1. If so then no other connections needto be made.If the data is not being received by the receiving device, try to connect the receiving device powerground to the same power ground as the TR-1.If this cannot be done, a last resort is to connect the power ground of the receiver to the green wireground connection of the TR-1 NMEA interface wires through a 125mA inline fuse. It is VERYimportant that the grounds never be connected without the fuse as this can create a fire hazardin the boat. Please contact TR-1 Autopilots technical support at 1-866-559-0229 for assistance.When connecting the TR-1 NMEA input to a non-compliant device there should be no problem asthe NMEA standard allows this connection to be made safely, although in this case ground noise mayshow up on the signal and cause intermittent problems. If these problems are experienced, a possiblesolution is to be certain that the “signal ground” and the power ground are connected at the samepoint.Non-Compliant NMEA 0183 Devices