Appearance
One end of the cable has a DB15 female connector, and the other end has eight cord end terminals,
as shown in Figure 2-19.
NOTE
If the cord end terminals of the cable do no match the ports on the external devices, cut off the cord end
terminals and make proper terminals on site.
Figure 2-19 Boolean/RS485 input cable
Pin Assignment
The cable can transmit 2-channel Boolean alarm signals and 1-channel RS485 signals. Table
2-21 describes the pin assignment for the wires of the Boolean/RS485 input cable.
Table 2-21 Pin assignment for the wires of the Boolean/RS485 input cable
X1 End
Cord End
Terminal
Wire Color Wire Type Label
X1.2 X2 White/blue Twisted pair SWITCH_INPUT0+
X1.3 X3 Blue GND
X1.6 X4 White/orange Twisted pair SWITCH_INPUT1+
X1.7 X5 Orange GND
X1.10 X6 White/green Twisted pair RS485_TX-
X1.11 X7 Green RS485_TX+
X1.13 X8 White/brown Twisted pair RS485_RX-
X1.14 X9 Brown RS485_RX+
Installation Position
The DB15 male connector is linked to the RS485/EXT_ALM port on the cabling cavity of the
RRU3804, and the other end of the cable is connected to the ports for Boolean alarm signals on
the external device.
2 RRU3804 and SRXU Hardware
RRU3804
User Guide
2-26 Huawei Technologies Proprietary Issue 01 (2007-11-29)
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