3.
System installation
1. Extension coding (take one extension as an example)
Connect a pair of white and black wires of the extension or waterproof switch onto the two-core bus corresponding
to the mainframe 1 and COM terminals according to the illustration (please pay attention to the polarity).
Connect a pair of white and black wires of the extension or waterproof switch onto the two-core bus corresponding
to the mainframe 1 and COM terminals on the mainframe according to the illustration, connect a pair of yellow and
black wires on the rear of the extension to the two-core wire in serial, and then connect to the negative and positive
poles of the external power supply (please pay attention to the polarity), plug the transfusion alarm device onto the
transfusion alarm port. (When the number of extensions is within 30, only one additional external power supply is
required, when the number of the extensions goes beyond 30, two additional power supplies are required).
A. If broadcast and transfusion alarm functions are not required for the extension, only a two-core bus is required
for connection between the extension and the mainframe. For specific wiring method, please refer to the following.
B. If broadcast and transfusion alarm functions are required for the extension, a four-core bus is required for
connection between the extension and the mainframe. For specific wiring method, please refer to the following.
Preparation for extension online coding: Connect one pair of white and black wires on the extension or the
waterproof switch respectively onto the two-core bus corresponding to 1 and COM terminals of the mainframe.
For the specific wiring, please refer to the 'Wiring mode for extensions, waterproof switches and mainframes'
of article 2 below (for details, please refer to P6).
Extension online coding setup: Connect the extension with the mainframe according to the above-mentioned
method, press down the mainframe's power switch for about two seconds, and the mainframe starts up and enters
the self check status. After self check, press the function key on the mainframe for about two seconds, and enter
the system setup options. For specific procedures of online coding setup, please refer to the 'Online coding setup'
of article 11 in the 'System setup' in the fifth time (for details, please refer to P15).
2. Connection between extensions, waterproof switches and mainframes
Mainframe rear diagram
2P
/
2
Waterproof
switch
2P
/
Connected to a pair of yellow and black
wires on the extension (note the polarity)
2
P /
External power
supply(14V 2.5A)
Negative pole
Positive pole
2
P /
6
Mainframe rear diagram
External power
supply(14V 2.5A)
Negative pole
Positive pole
Connected to a pair of yellow and black
wires on the extension (note the polarity)
Waterproof
switch 4
Waterproof
switch 60
Extension 1
Extension 3
Extension 59
2
Waterproof
switch
Waterproof
switch 4
Waterproof
switch 60
Extension 1
Extension 3
Extension 59
