Heatmaster 2
9
ALWAYS ensure correct connection to the pins! If incorrect connections are made or pins are
shorted out, damage may be caused to the Alphacool Heatmaster and / or the connected hardware.
Pay special attention to the correct connection of the USB cable. If the cable is connected improperly
damage may be caused to the Alphacool Heatmaster 2 or the connected hardware. Never remove the
USB connection cable when the system is switched on. The Heatmaster 2 is not hot-plug capable.
HM BUS
Heatmaster 2 BUS-utilization inquiry.
Emergency shutdown
Output for switching of a relay. Via this feature the hardware can be switched off immediately in case of an
emergency. The switching current must not exceed 100mA.
Data corruption cannot be ruled out if the
emergency shutdown is activated.
PC shut down
This output can be connected to the Mainboard. When the shut-down signal is sent, the output works like the
power switch of the system.
NTC 1 -6 temperature sensors
Here the temperature sensors can be connected. Use only sensors with a resistance of 5k Ohm or 10k Oh.
The Heatmaster 2 detects these after a reset. The setting can also be made manually.
Water level
To this input an analogue coolant level sensor can be connected. With this sensor the Heatmaster is able to
give a warning if the coolant level is too low.
LED 1 silent alarm
Status LED. This connector is active when the silent alarm is activated. The switching current must not
exceed 2mA.
LED 2 alarm
Status LED. Is active when the alarm is activated. The switching current must not exceed 2mA.
LED 3 warning
Status LED. Is active when a warning is activated. The switching current must not exceed 2mA.
Relay 1-3
With the outputs relays can be controlled, the switching current must not exceed 80mA.
Button 1-3
Inputs for 3 buttons. The buttons must be equipped with a make contact to allow the Heatmaster 2 to
interpret the signal correctly.
Heatmaster reset
With the Jumper the Heatmaster can be restarted. To restart remove the jumper for a short period of time
and plug it in again.
When conducting a hardware reset it is necessary to disconnect the Heatmaster 2 in the software if
the software is started.
IMPORTANT: A reset switches off all outputs!
5V Standby
Power supply for stand-by operation. The PSU must be able to supply at least 1A of current at 5V.
12V and 5V output
Power supply for external devices.
