Remote Temperature Sensor Manual

Morningstar Remote Temperature Sensor
Installation and Operating Instructions
WHEN TO USE
The RTS is compatible with all Morningstar products that support a Remote Temperature Sensor (RTS) option. These
products include the ProStar™, SunKeeper™, SunSaver Duo™, SunSaver MPPT™, TriStar™, and TriStar MPPT™
solar controllers.
Use of the RTS is recommended whenever the temperature at the battery will be more than 5 °C (9 °F) different than
the temperature at the controller. The TriStar has no on-board temperature compensation; therefore the use of the RTS
is required for temperature compensated charging.
OPERATION
The RTS is encapsulated in epoxy inside a terminal lug for maximum protection. The RTS will correct for temperatures
from -30 °C (-22 °F) to +80 °C (+176 °F). The RTS is also protected from lightning surges and short circuits.
As soon as the RTS is connected, the controller will begin to use the battery temperature for charge control. The RTS
can be connected at any time during operation. Disconnecting the RTS during operation may cause the controller to
enter a fault / error condition. Refer the controller’s documentation for more information.
TESTING
If the controller has a digital meter, the RTS temperature measurement can be viewed to confi rm that the RTS is prop-
erly connected. Refer to the product meter documentation for more information.
If the controller does not have a meter or meter option, connect the RTS and then disconnect the RTS. The controller
should indicate a fault / error LED sequence. Reconnect the RTS and the fault /error should clear, indicating that the
RTS was successfully connected.
EXTENDING CABLE LENGTH
If the battery is located more than 10 meters (33 ft) from the controller, the RTS cable length can be extended up to
30 meters (100 ft.).
It is recommended that the original remote sensor cable be cut and the new cable soldered into the middle. Solder
the spliced wire connections and tape or seal the bare wires.
The new cable extension should be a shielded, twisted pair cable. The new wires should be at least 0.34 mm2 (22
AWG), and a larger size 1.0 mm2 (18 AWG) is recommended for best performance.
SPECIFICATIONS
Power lug housing: 9.5 mm ( 3/8” ) screw hole•
10 meter 2-conductor copper cable with PVC jacket•
Cable rated UL CMR•
Accuracy +/- 1.5 °C ( 2.7°F )•
ETL recognized component for use with TriStar and TriStar MPPT controllers•
CE certifi ed for use with all supported Morningstar Products•
8 Pheasant Run
Newtown, PA 19840
Email: [e-mail]
Website: www.morningstarcorp.com