Asus TS100-E6/PI4 - Manual (Page 48)

Chapter 3: Motherboard information 3-10
6. CPU, front and rear fan connectors
(4-pin CPU_FAN1, FRNT_FAN1–3, REAR_FAN1)
The fan connectors support cooling fans of 350 mA–740 mA (8.88 W max.)
or a total of 3.15 A–6.66 A (53.28 W max.) at +12V. Connect the fan cables to
the fan connectors on the motherboard, ensuring that the black wire of each
cable matches the ground pin of the connector.
• DO NOT forget to connect the fan cables to the fan connectors. Insufficient
air flow inside the system may damage the motherboard components.
• These are not jumpers! DO NOT place jumper caps on the fan connectors!
• All fans feature the ASUS Smart Fan technology.
5. Thermal sensor cable connectors (3-pin TR1)
This connector is for temperature monitoring. Connect the thermal sensor
cable to this connector and place the other end to the device, which you want
to monitor temperature.