Recirculating cooler
（
Chiller
）
19
More details for alarms information please refer to Appendix II.
3.5 Hardware interface (Optional)
The hardware port provides normally open contact signal of the relay to
user’s instrument, whose load capacity is 0.3A/125VAC or 0.3A/110VDC or
1A/30VDC. In which water level alarm signal, water flow alarm signal and
temperature alarm signal can be output. This port on the back of the chiller
output signals via 12-pin or 7 pin aviation plug.
The definition of the 12 pins of the
aviation plug:
Pin 1&2: water flow signal output,which
function with normal water flow and
disconnect with abnormal water flow..
Pin 3&4: water level signal output,which
function with normal water level and
disconnect with abnormal water level.
Pin 5&6: Temperature signal output 1,it is customized.
Pin 7&8: Temperature signal output 2,it is customized.
Pin 9: Control input (+) port for receiving of contact signals or level signals
(15 mA/the resistance provided by the client side).Start the unit with high
level or when connected,stop the unit with low level or when disconnected.
Pin 10: Control input (+) port.
Pin11 &12: Reservation.
