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2
2.3 Setting the Baud Rate (ONLY USED for BACnet MS/TP and Modbus RTU)
•
ET9500 uses the "B" bank of DIP switches (B0 – B3) to set the baud rate of the ET9500
to match the baud rate required by the BEMS for BACnet MS/TP or Modbus RTU.
•
The default configuration is 38400 baud (B0,B1,B3 on and B2 off).
•
If you have a different baud rate remove the white label (A0-7, B0-3, S0-3) to access
DIP switches.
NOTE: When setting DIP Switches, please ensure that power to the board is OFF.
•
See Figure 4 for the switch settings to select 9600, 19200, 38400, 57600, 76800.
•
Set the DIP switches to the positions that match the baud rate required.
B0
B1
B2
B3
B0 - B3 DIP
Switches
OFF ON
Baud
9600
19200
38400
57600
76800
Figure 4: Switch Configuration for Baud Rate
B Bank DIP Switch Location
B0
B1
B2
B3
On
On
On
Off
Off
Off
Off
On
On
On
Off
On
Off
Off
On
On
On
Off
On
On
— 7 —
COMMUNICATION PROTOCOL SETUP
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