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8 ThermoKing

8.1

Datalogger DAS / SR2 / CargoWatch

8.1.1

Serial RS 232 connection to CargoWatch.

Solder the TX and RX connections on the connector on the controller board or use a connector.

The 1 kohm resistor R1 secures that the CargoWatch Port is not blocked when connection in parallel

with the connector. When a connector is used R1 is not necessary.

8.1.2

Ignition Connection

The ignition input (Brown – pin 12) can be connected to the trailer 24 volt (Light). It will then show if

the trailer is connected to a truck with ignition on (Light turned on). Trailer and datalogger has

separated ground. Remember to mount the 1 kohm resistor R2. On trucks the ground is normally

common and the resistor is not needed.

Can also be connected to the ignition of the refrigeration unit and used to indicate is the cooler is

running.

If this option is not used, the brown wire must be connected to the white wire (CargoWatch 12 volt).

8.1.3

Configuration of datalogger

(Will be described later)

8.1.4

System configuration

Note the placement and names of the different temperature sensors and set-points. Needed for system

configuration.