DC TRANSMISSION BOARD, 5621063
BAUD RATE 3
BAUD RATE 2
BAUD RATE 1
’ UNUSED
UNUSED
UNUSED
CHANNEL 2
CHANNEL 1
A DC transmission board is required for each communication channel used in the system (up to 2). Each board
has a switch package (Jl) which is used to select the baud rate and the associated channel address. Except for
the setting of switch package Jl , the transmission board for Channel 1 is identical to that for Channel 2.
When the transmission board is used for Channel 1, switch 8 of Jl will be CLOSED. When it is used for Channel
2, switch 7 of Jl will be CLOSED.
To determine the selected baud rate for your communication channel(s), refer to the 2120 CPU board, jumper
package Jl (see Figure 1). Close the corresponding switch on switch package Jl on the transmission board.
CAUTIqN: If you close more than two switches on Jl , you will destroy the CPU board’s baud rate generator!
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