EMU RS485 communication cable

The RS485 communication cable is used for the communication between the BSC and the EMU.

Appearance

Figure 1 shows the RS485 communication cable.

Figure 1 RS485 communication cable

Pin Assignment

Table 1 lists the pins of the RS485 communication cable.

**Table 1** Pins of the RS485 communication cable
RJ45	DB9
4	2
1	3
5	6
2	7

Installation Position

One end of the RS485 communication cable with a DB9 male connector is fixed to the DB9 socket on the environment monitoring device. The other end of the RS485 communication cable with an RJ45 connector is connected to the COM1 port on the BSC common power distribution box or to the J1 port on the BSC high-power distribution box. as shown inFigure 2

Figure 2 Connecting the cable between the EMU and the power distribution box of the cabinet

NOTE:

The EMU inherits all the functions of the EAC. Compared with the EAC, the EMU has a different hardware structure.
One environment monitoring instrument is delivered with one RS485 signal cable (10 m) and one RS232 signal cable (2 m). Choose one of the signal cables based on actual needs. RS485 is usually preferred. Use the Ethernet cable as a substitute if the delivered signal cable is not long enough.