Compatible Sensors and Wiring
Power Supply (Sensor Excitation) The GX Tank 140 itself is powered from USB and needs no external power source. It can supply power to the sensors connected in two different ways. External Power Supply (Channels 1 & 2) The connector labeled “Ext. Power” can be used to distribute power from an external source to the sensors connected on channels 1 and 2. A self-resetting fuse (20mA) in this line prevents the unit from damage even in case of a short in wire or broken sensor. Built-in 24V Power Supply (Channels 3 & 4) Channels 3 and 4 are powered by an internal supply (isolated from USB) with a voltage of 24V. The outputs are equipped with a self-resetting fuse that limits the current to a max of 20mA each. Isolation The USB port is isolated from the sensors. As such there is no risk for ground loops from the sensors to the USB socket of the controller. The GNDs of all four channels are connected internally, they are not isolated individually.
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