Installation & Owner's Manual 
8 
Table.3-4
7) IO terminal
8) Uninterruptible power supply (UPS BK650-CH optional) 
Table.3-5 
4. SYSTEM INTRODUCTION
M-INTERFACE is a Central Air-conditioning multi-connected devices’ gateway which based on WEB, 
is an important part of Intelligent Manager system (IMM). Connect to Central Air-conditioning devices 
through the M-net terminal. It can connect the multi-connected devices through its M-net connector 
(M-net connector is XYE communication terminals and K1K2E communication terminals); under the 
auto topology mode, it can connect 4 refrigerant systems at most (can insert 256 sets indoor units and 
16 sets outdoor units); under the manual topology mode, it can connect16 refrigerant systems at most 
(can insert 256 sets indoor units and 64 sets outdoor units). The operation methods of auto topology 
and manual topology please  refer  to IMM TECHNOLOGY MANUAL. The appearance interface of 
M-INTERFACE gateway as follow displays:
Requirements Performance
Capacity 650 VA/400 Watt
Voltage 220V±8%(Battery)
Control signal 50Hz±1Hz(Battery)
Note: When cut off the power please completely close 
the computer.
Gateway 
controller Base pin name  Function denition
Pin1 Gateway controller error output; 
Pin2
When the device operates normally, break off Pin1 and 
Pin2, close Pin2 and Pin3; when it is error, close Pin1 and 
Pin2, break off Pin2 and Pin3. 
Pin3 When it’s powered off, the device still output error. 
Pin4
Emergency stop signal, this signal is input signal, and if this 
signal is high-level (12~36VDC), then means emergency 
stop;  if  this  signal  is  low-level  (0~0.7VDC),  then  means 
normal.
Pin5 Reserve function
Pin6 Ground wire with emergency signal 
1 2 3
IN1 IN2 E
4 5 6